Margate Shipping Co. v. M/V JA Orgeron , 143 F.3d 976 ( 1998 )


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  •                         REVISED - JULY 1, 1998
    IN THE UNITED STATES COURT OF APPEALS
    FOR THE FIFTH CIRCUIT
    _____________________
    No. 96-30950
    _____________________
    MARGATE SHIPPING COMPANY,
    Plaintiff-Appellee,
    versus
    M/V JA ORGERON, her engines, tackle,
    apparel, etc., in rem,
    Defendant,
    UNITED STATES OF AMERICA,
    Third-Party Plaintiff-Appellant,
    versus
    CONTINENTAL UNDERWRITERS, LTD.
    Third-Party Defendant.
    *****************************************************************
    MONTCO OFFSHORE, INC., Owner and
    operator of the M/V JA ORGERON for
    exoneration from or limitation of
    liability,
    Plaintiff,
    versus
    MARGATE SHIPPING CO., ET AL.,
    Claimants,
    MARGATE SHIPPING CO.,
    Claimant-Appellee,
    versus
    UNITED STATES OF AMERICA,
    Claimant-Appellant.
    _________________________________________________________________
    Appeal from the United States District Court for the
    Eastern District of Louisiana
    _________________________________________________________________
    June 29, 1998
    Before GARWOOD, JOLLY, and HIGGINBOTHAM, Circuit Judges.
    E. GRADY JOLLY, Circuit Judge:
    This appeal arises from the grant of what appears to be the
    largest maritime salvage award in recorded history.        During a
    severe tropical storm off the Florida coast, the M/V Cherry Valley,
    an oil tanker belonging to Margate Shipping Co., rescued a barge
    containing a valuable external fuel tank for NASA’s space shuttle.
    The district court awarded Margate approximately $6.4 million in
    salvage.    The United States appeals only as to the amount of the
    award.     Based on the district court’s mistaken valuation of the
    fuel tank, we reduce the award to $4.125 million and render.
    I
    ‘Twas a dark and very stormy night, November 14-15, 1994, and
    the situation looked bleak for the barge Poseidon.   Caught in the
    clutches of Tropical Storm Gordon, Poseidon and her escort, the
    J.A. Orgeron, were without power and adrift.   Driven on the gales
    of the tempest, the flotilla was swiftly approaching the Bethel
    2
    Shoal; if they ran aground, the ships were sure to founder and be
    lost.    Acutely aware of the danger, Orgeron’s captain radioed for
    help.    Alas, the Coast Guard was not in a position to mount a
    rescue. In despair, the captain made plans to release Poseidon and
    her valuable cargo, an external fuel tank for the space shuttle.
    Although this action would result in the certain loss of Poseidon
    and the tank, the captain hoped thereby to save Orgeron and her
    crew.
    The voyage had begun some five days earlier.        On November 10,
    Orgeron left New Orleans harbor with Poseidon in tow.         Orgeron was
    an ocean-going tug being operated by Montco Offshore, Inc., under
    contract for NASA.      Under that contract, Orgeron’s principal task
    was to transport space shuttle fuel tanks from Martin Marietta’s
    assembly plant in Michoud, Louisiana, around the Florida peninsula
    to Kennedy Space Center on Cape Canaveral.         For this work, Orgeron
    used    Poseidon,   a   NASA-owned   ocean-going   barge   that   had   been
    specially fitted with a covered hangar large enough to contain a
    fuel tank.     On this trip, Poseidon was loaded with the freshly
    manufactured tank designated ET-70 and an associated transport.
    Shortly after leaving New Orleans, Orgeron’s “jockey arm,” a
    bar connecting its two rudders, broke, resulting in the complete
    disabling of the starboard rudder for the duration of the voyage.
    Rather than put in for repairs, however, Orgeron pressed on,
    relying on the still functional port rudder to see her through.
    3
    On November 13, as Orgeron and Poseidon rounded the southern
    tip of Florida, they began to encounter increasingly severe winds
    and heavy seas generated by Tropical Storm Gordon.1            Concerned by
    the rapidly worsening weather, Orgeron’s captain radioed Montco,
    asking for permission to seek refuge from the storm in Miami.
    Permission was denied, as reflected by the following notation in
    Orgeron’s Weather Log: “Recommendation to put into Miami--NASA
    requested to continue on.”
    At approximately 2:00 a.m. on November 15, Orgeron lost the
    effective use of both her engines.2         At the time, the flotilla was
    between ten and eighteen miles off Florida’s Atlantic coast,
    somewhere   between   Fort   Pierce       and   Cape   Canaveral.   Without
    Orgeron’s engines, the tug and barge were left adrift, and began to
    be blown west towards shore.3         Orgeron immediately notified the
    Coast Guard of her predicament, and requested assistance.           Because
    1
    The winds ranged from thirty-four to sixty knots, and the
    seas from fifteen to twenty feet.
    2
    The port engine’s gear box failed, rendering it completely
    inoperable. The starboard engine, which Orgeron had apparently not
    been using since the problem with the rudder arose, caught fire
    when it was started and quickly became completely disabled as well.
    3
    Orgeron did, of course, have an anchor, which she deployed.
    This anchor was apparently not even remotely sufficient to hold the
    flotilla’s position in the severe winds and heavy seas generated by
    the storm, however, and it was simply dragged across the seabed as
    the whims of the tempest dictated. There was an additional anchor
    on Poseidon that might have helped, but, unfortunately, it could
    only be deployed from Poseidon itself, and no one was on the barge
    at the time the engines failed, nor could anyone be transferred in
    the storm.
    4
    of the storm’s ferocity, however, the Coast Guard was unable to
    help.
    Without hope of rescue, Orgeron’s captain considered his
    options.    He surmised that the flotilla was being blown toward
    shore chiefly because of the sail effect of Poseidon’s tall hangar.
    He concluded that Orgeron and her crew might be able to stave off
    grounding in the storm by releasing Poseidon and delivering the
    barge to her fate.       Preparations were made, but before this
    contingency became necessary, the captain received word that help
    was on the way after all.
    Orgeron’s distress call had been picked up by the M/V Cherry
    Valley.    Cherry Valley was a 688-foot oil tanker owned by Margate
    with a crew of 25 and a value of $7.5 million.   On November 15, the
    ship was fully laden with nine million gallons of heavy fuel oil
    and had a draft of about 35 feet.     She was pursuing a course in
    deep water somewhat south of Orgeron’s position when she picked up
    the distress call.   Although under no obligation to assist, Cherry
    Valley’s master, the suitably named Captain Strong,4 immediately
    altered course to rendezvous with the tug.    In so doing, he took
    4
    Captain Prentice Strong III was a graduate of the Maine
    Maritime Academy, and had been going to sea for over ten years at
    the time of the events in this case. It is a substantial testament
    to his ability that he reached the pinnacle of his profession,
    master of a large ocean-going tanker, at the remarkably youthful
    age of 32. Given this record, we are not surprised that Captain
    Strong displayed exemplary seamanship throughout this incident.
    5
    his relatively unmaneuverable craft into perilous shoal waters in
    direct violation of standing orders.
    Cherry Valley arrived on the scene shortly after 4:00 a.m.,
    whereupon Captain Strong decided to try to pass a line to Orgeron
    and tow the flotilla to safety.     To do this, however, he would need
    to maneuver clumsy Cherry Valley directly alongside Orgeron in the
    churning seas.    Time was short, as the vessels were rapidly
    approaching the Bethel Shoal; the Shoal had depths of six to seven
    fathoms in   places,   far   too   shallow   for   Cherry   Valley,   which
    required at least ten fathoms for safe operation in heavy seas.
    The flotilla had almost reached this depth when Cherry Valley
    arrived.
    Captain Strong’s plan was to pass close enough to Orgeron to
    send over a messenger line on a line-throwing rocket.           This line
    could then be used to transfer larger mooring lines capable of
    sustaining the tow.    Captain Strong ordered several crewmen onto
    deck to conduct the line-passing operation. Throughout the salvage
    operation, Cherry Valley’s deck would be awash with green seas and
    extremely dangerous, even for experienced seamen.5
    On Cherry Valley’s first pass, the messenger line fell short,
    and Captain Strong was forced to bring the ship about for another
    attempt.   This time, he passed even closer to Orgeron, and the
    5
    Not terribly surprising, given that the vessels were in the
    midst of a tropical storm, a weather phenomenon only one step short
    of a hurricane.
    6
    messenger line was successfully transferred.          It parted, however,
    before the deck crew was able to transfer a mooring line, and
    Captain Strong was compelled to bring Cherry Valley about once
    more.
    Time was becoming increasingly critical. The vessels were now
    less than one mile from the Shoal, and the water was becoming quite
    shallow.    If Cherry Valley ran aground in the storm, she would
    likely break up and cause a massive oil spill.          In full awareness
    and express consideration of this danger, Captain Strong informed
    Orgeron that he would only make one more attempt.
    Fortunately, the third effort was successful. Cherry Valley’s
    deck crew managed to pass two hawsers6 to Orgeron, which were
    quickly made fast.      During the transfer, however, Cherry Valley
    passed over the tow line running between Orgeron and Poseidon.
    Captain Strong held his breath waiting to know if the line would
    foul Cherry Valley’s rudder or propeller.          It did not.    If it had,
    Cherry    Valley   likely   would   have   found   herself   in   the   same
    predicament as Orgeron and Poseidon.
    At 6:20 a.m., Cherry Valley finally was able to take the
    flotilla in tow.    By this time, her propeller was churning mud and
    the fathometer indicated that there were less than ten feet between
    her keel and the bottom.
    6
    Strong mooring or towing lines.
    7
    With Orgeron and Poseidon in tow, Cherry Valley steamed slowly
    southeast, back into deep water.       The tow put great strain on the
    hawsers and chocks, however, which required constant attention in
    the form of “slushing.”7   In addition to the inherent dangers of
    being on deck in the storm, slushing put Cherry Valley’s deck crew
    in constant danger of being struck by a parting line; a hawser that
    parts under great strain can snap like a giant rubber band, causing
    severe injury to all nearby.
    At 11:00 a.m., the tug South Bend arrived on the scene from
    Fort Pierce and attempted to assist.       Because of the extreme sea
    and weather conditions, however, South Bend was unable to pass a
    line to Orgeron, or to put a crewman aboard Poseidon to operate her
    anchor. Unable to help and now fearful for his tug’s own survival,
    South Bend’s master decided to retreat.      His fears were justified.
    While returning to port, South Bend was overcome by the seas and
    began to sink.   She issued a mayday call, but no one could assist.
    She was just able to pass within the Fort Pierce harbor jetty,
    where her captain intentionally grounded her to avoid a total loss.
    It was the district court’s undisputed finding that the actions of
    South Bend would have had no effect on the outcome for Orgeron and
    Poseidon in the absence of Cherry Valley, both because she would
    have arrived too late and because she would have been unable to
    render effective assistance in the storm.
    7
    Basically, lubrication.
    8
    At this point, the tempest began to overcome even Cherry
    Valley.    Because of the strain on the hawsers, she was not able to
    steam directly into the wind.            As the storm worsened, she was
    pushed westward, back into the shallows.         Out of options, Captain
    Strong decided to anchor and ride out the rest of the storm.
    Although this operation exposed the deck crew to additional risks,
    it was accomplished without incident at 5:00 p.m.
    While anchored, one of the mooring lines parted.               Cherry
    Valley’s deck crew was able to replace and supplement it, and the
    flotilla remained intact.
    The   vessels   remained   at   anchor    throughout   the   night   of
    November 15 and the following day, with Cherry Valley’s deck crew
    constantly tending the lines.        During that day, NASA was able to
    contract with the tug Dorothy Moran to relieve Orgeron and bring
    Poseidon into port.     On the evening of November 16, Dorothy Moran
    arrived on the scene.    Like South Bend, however, she was unable to
    pass a line to Orgeron or Poseidon, or to put a crewman aboard the
    barge. After several unsuccessful attempts, Dorothy Moran returned
    to Fort Pierce to await daybreak and better weather.
    By midmorning of November 17, the storm had finally passed and
    Dorothy Moran and another tug were able to relieve Cherry Valley.
    Orgeron was towed to Fort Pierce, while Dorothy Moran completed
    Orgeron’s contract and towed Poseidon to Port Canaveral. ET-70 was
    9
    delivered intact and completely unharmed, and was later used in a
    successful space shuttle launch.
    ET-70 itself had been manufactured under a long-term contract
    between NASA and Martin Marietta.         The contract provided for the
    production of sixty fuel tanks for a total price of $3.4 billion,
    with the last tank to be delivered on September 29, 2000.             Every
    tank was needed for NASA’s planned series of missions.                 Under
    NASA’s plan, however, a minimum of four tanks were slotted to be
    complete and available (“in circulation”) at all times relevant to
    this case.
    As part of NASA’s standard procurement procedure, each tank
    produced   under   the   contract   was    accompanied    by   a   “Material
    Inspection and Receiving Report,” otherwise known as a “DD-250.”
    Among other things, the DD-250 contained an estimated production
    cost of the particular tank being delivered.       In the case of ET-70,
    the DD-250 cost was $53,834,000.         The next tank in the production
    cycle, ET-71, had a DD-250 cost of $51,387,000.          The difference in
    price is basically attributable to the fact that, as the contract
    progressed, various overhead items declined in cost.           There is no
    dispute that, had ET-70 been lost, ET-71 would likely have taken
    its place on the designated mission.
    On December 21, 1992, acting on NASA’s specific request,
    Martin Marietta gave the government an “option” on up to four
    additional tanks to be produced during the course of the contract
    10
    for a total additional cost of $19,014,479 per tank.    The option
    provided for a thirty-six month minimum lead time for the order of
    an additional tank, and although NASA provided no consideration for
    the option, Martin Marietta declared that its terms constituted a
    “firm price” offer.    The government never accepted this offer,
    however, and it was eventually withdrawn, again at NASA’s specific
    request, approximately six months before the events in this case.
    II
    On December 12, 1994, Margate filed an action for salvage
    against the J.A. Orgeron in the Federal District Court for the
    Eastern District of Louisiana. Montco answered, and then filed its
    own claim for limitation of liability.   The United States, fearing
    an eventual salvage action against itself, filed a claim in the
    limitation action seeking indemnification from Montco.     Margate
    then filed a cross-claim for salvage against the United States.
    Eventually, everything was settled except for Margate’s cross-claim
    against the United States, which went to trial in July 1996 before
    District Judge Stanwood Duval.
    On July 9, after a brief bench trial, Judge Duval read his
    findings of fact and conclusions of law into the record.      In a
    reasoned oral ruling, he found that, based on the entirety of the
    evidence, Margate was entitled to a salvage award equal to 12.5% of
    the value of the salved property, Poseidon and ET-70.
    11
    In   reaching   this   figure,    Judge   Duval   relied   on   the   six
    traditional salvage factors first announced8 in The Blackwall, 
    77 U.S. 1
    , 14 (1869).      He determined that the facts of the case
    pointed to the highest possible award under each of the factors,
    and chose what he considered to be a high percentage of a high
    salved value to reflect this circumstance.              Judge Duval also
    considered the application of a seventh factor, the “salvors’ skill
    and effort in preventing or minimizing damage to the environment,”
    as announced in Trico Marine Operators, Inc. v. Dow Chemical Co.,
    
    809 F. Supp. 440
    , 443 (E.D. La. 1992), but ultimately concluded
    that it was not applicable to the case.         He did consider the risk
    of environmental liability incurred by Cherry Valley under the
    rubric of the traditional factors, however.
    With regard to ET-70, Judge Duval determined that it was
    specialized property without a market value, and therefore most
    appropriately appraised at its “replacement cost.”          This value, he
    found, was the production cost of ET-71, $51,387,000, because ET-71
    was the likely “replacement” of ET-70.           In making this finding,
    Judge Duval explicitly rejected the government’s argument for a $19
    million replacement cost based on the withdrawn 1992 option,
    8
    And, interestingly, last announced as well. The Blackwall
    contains the most recent bit of guidance that the Supreme Court has
    deigned to give on the subject of the calculation of salvage
    awards.
    12
    calling it “much too speculative.”      He also rejected Margate’s
    argument for a $92 million “cost-accounting” valuation.
    Combining this $51 million value for ET-70 with the $2 million
    stipulated value of Poseidon, Judge Duval declared a total award of
    $6,406,440 based on the 12.5% figure.   He noted in the alternative
    that, even if the value of ET-70 were only $19 million as the
    United States claimed, the award would be the same as he would
    adjust the percentage accordingly.   On July 12, final judgment was
    entered for Margate in the amount of $6,406,440.   The United States
    appeals the amount of this award.
    III
    Because of the fact-specific nature of the calculation of a
    salvage award, “the amount allowed is to be decided by the district
    court in its sound discretion.”      Allseas Maritime, S.A. v. M/V
    Mimosa, 
    812 F.2d 243
    , 246 (5th Cir. 1987).     “[A]n award will be
    altered only if it was based upon incorrect principles of law or
    misapprehension of the facts or it is either so excessive or so
    inadequate as to indicate an abuse of discretion.”        
    Id. This standard
    of appellate review is a time-honored and integral part of
    American maritime law, and has changed little since its infancy.
    See, e.g., Hobart v. Drogan, 35 U.S. (10 Pet.) 108, 119 (1836)
    (Story, J.) (“[T]his court is not in the habit of revising such
    decrees as to the amount of salvage, unless upon some clear and
    palpable mistake or gross over-allowance of the court below.”);
    13
    Oelwerke Teutonia v. Erlanger & Galniger, 
    248 U.S. 521
    , 524 (1919)
    (Holmes, J.) (“Unless there has been some violation of principle or
    clear mistake, appeals to this Court concerning the amount of the
    allowance are not encouraged.”); 3A Martin J. Norris, Benedict on
    Admiralty § 311 (7th ed. 1997) (“An appellate court is, generally
    speaking, loath to change a salvage award.”).         We keep this well-
    hewn principle firmly in mind as we embark upon the somewhat more
    intensive investigations necessitated by the instant case.
    IV
    An award of salvage is generally appropriate when property is
    successfully and voluntarily rescued from marine peril.                 The
    Sabine, 
    101 U.S. 384
    (1880).       As Justice Marshall noted long ago,
    this rule is peculiar to maritime law, and utterly at variance with
    terrene common law.    Mason v. The Blaireau, 
    6 U.S. 240
    , 266 (1804)
    (Marshall, J.) (although it is true that, when property on land
    exposed to grave peril is saved by a volunteer, no remuneration is
    given, “[l]et precisely the same service, at precisely the same
    hazard, [b]e rendered at sea, and a very ample reward will be
    bestowed in the courts of justice”).           Because of the peculiar
    dangers of sea travel, public policy has long been held to favor a
    legally   enforced   reward   in   this   limited   setting,   to   promote
    commerce and encourage the preservation of valuable resources for
    the good of society.    See B.V. Bureau Wijsmuller v. United States,
    
    702 F.2d 333
    , 337 (2d Cir. 1983) (“The law of salvage originated to
    14
    preserve    property    and   promote    commerce.”)     (citing   Seven    Coal
    Barges, 
    21 F. Cas. 1096
    , 1097 (C.C.D. Ind. 1870) (No. 12,677) (“The
    very object of the law of salvage is to promote commerce and trade,
    and the     general    interests   of   the   country,    by   preventing   the
    destruction of property.”)).
    In this case, there can obviously be no dispute that the basic
    elements supporting a salvage award are present, and the United
    States has expressly conceded that Margate is entitled to some
    award.     As noted, the question for this court is simply how high
    that award should be.
    The district court traditionally determines the amount of a
    salvage award according to the six Blackwall factors.9               
    Allseas, 812 F.2d at 246
    & n.2.        They are (in order of original listing):
    1.     The labor expended by the salvors in rendering the
    salvage service.
    2.     The promptitude, skill, and energy displayed in rendering
    the service and saving the property.
    3.     The value of the property employed by the salvors in
    rendering the service, and the danger to which such
    property was exposed.
    4.     The risk incurred by the salvors in securing the property
    from the impending peril.
    5.     The value of the property saved.
    6.     The degree of danger from which the property was rescued.
    9
    At least in theory. Some commentators have said that the
    district court traditionally “pull[s] an arbitrary figure out of
    the air.”   Grant Gilmore & Charles L. Black, Jr., The Law of
    Admiralty 563 (Foundation 2d ed. 1975).
    15
    The Blackwall, 
    77 U.S. 1
    , 14 (1869) (Clifford, J.).     Although old,
    “[t]hese guidelines have weathered the storms of the past century.”
    St. Paul Marine Transport Corp. v. Cerro Sales Corp., 
    505 F.2d 1115
    , 1120 (9th Cir. 1974).
    In this case, the district court made the following findings
    under the factors, listed here in order of the court’s assessment
    of their importance to the calculation of an award:
    1. (Blackwall 6.)      Poseidon and ET-70 were in imminent
    danger of complete loss.
    2. (Blackwall 5.)      The combined value of Poseidon and ET-70
    was $53,387,000.
    3. (Blackwall 4.)      The salvors incurred extremely high risk
    in securing Poseidon and ET-70, both as
    to loss of their ship and lives and as to
    the creation of substantial environmental
    liability in the event of an oil spill.
    4. (Blackwall 2.)      The salvors displayed extremely high
    promptitude,   skill,   and  energy   in
    rescuing Poseidon and ET-70 by virtue of
    their daring and successful seamanship
    under very difficult conditions.
    5. (Blackwall 3.)      The value   of   Cherry   Valley was $7.5
    million.
    6. (Blackwall 1.)      The salvors expended two and one-third
    days of labor in rendering the salvage
    service.
    As noted, the district court determined that each factor indicated
    the highest possible award, and it chose 12.5% of the salved value
    as an appropriate figure.
    16
    The United States makes three basic challenges to the district
    court’s analysis.    First, it argues that the court erred in its
    general application of the Blackwall factors, by giving too much
    weight to the value of the salved property, by counting the
    potential for environmental liability as risk to the salvors, and
    by using a percentage of the salved value to fix ultimately the
    award.    Second, even assuming that the district court made a
    correct legal interpretation of the factors, the United States
    argues that the district court clearly erred in its valuation of
    ET-70.    Finally, even assuming that the district court made a
    correct legal interpretation of the Blackwall factors and properly
    valued ET-70, the United States argues that the court nonetheless
    abused its    discretion   in   picking   such   a   high   percentage   and
    generally making such a large award in this case.           We address each
    argument in turn.
    A
    To address properly the United States’s first contention, it
    is necessary to excavate the somewhat obscure foundations of the
    Blackwall rule.     As many commentators have noted, the sense and
    contours of the factors are less than plainly engraved upon their
    face.10   In this case, however, the United States squarely asks us
    10
    See, e.g., Gilmore & Black at 559 (noting that the
    traditional “recitation of Justice Clifford’s six ‘ingredients’
    [really just] serves the useful purpose of indicating that the
    variables are so many and so incapable of exact measurement that it
    will probably be fruitless for either party to take an appeal
    17
    to decide whether the particular interpretation and application
    adopted by the district court comports with the factors’ essential
    meaning.   In order for us to answer this question, we must first
    ascertain what purpose the factors serve.
    1
    Maritime salvage is as old and hoary a doctrine as may be
    found in the Anglo-American law.      Since time immemorial, the
    mariner who acted voluntarily to save property from peril on the
    high seas has been entitled to a reward.   This simple rule has been
    an integral part of maritime commerce in the western world since
    the western world was civilized.11
    merely on the ground that the award was incorrectly computed”). As
    we shall see, we ultimately take a somewhat more sanguine view of
    the rationality of the factors as a legal rule.
    11
    The earliest incarnation of the doctrine can be found in the
    celebrated maritime code of the island of Rhodes, from about 900
    B.C. The Rhodian law is thought to have provided that “if a ship
    be surprised at sea with whirlwinds, or be shipwrecked, any person
    saving anything of the wreck, shall have one-fifth of what he
    saves.” Norris § 5. Similarly, “[i]f the ropes break, and the
    boat goes adrift . . . [a]nd if any person finds the boat, and
    preserves it safe, he shall restore everything as he found it, and
    receive one-fifth part as a reward.” 
    Id. The Rhodian
    law was adopted en masse by the Romans, who first
    enunciated the tradition that the law of the sea belonged to the
    ius gentium, and was thus outside of the legislative jurisdiction
    of any one people. Dig. 14.2.9 (Volusius Mæcianus, Ex Lege Rodia)
    (citing adoptions by Augustus and Antoninus).
    Even after the Romans and Rhodians had become a faint memory
    on the italic peninsula, their doctrine of salvage remained. The
    Marine Ordinances of Trani, promulgated in 1063 A.D., provided that
    the finder of goods cast upon the sea was entitled to retain half
    of them if the owner came forward within thirty days, and to the
    entirety if he did not.       Ordinances and Custom of the Sea,
    Published by the Consuls of the City of Trani art. XIX (1063),
    18
    Simple in principle, in the many centuries of its existence,
    the law of salvage has become encrusted with a multitude of court-
    created doctrinal complexities; the Blackwall factors are merely
    the    most   prominent   example   of    this   phenomenon.       As   modern
    scholarship has taught us, these legal barnacles are the natural
    and desirable results of the common law process.            Court by court
    and case by case, the law of salvage has been steadily honed to
    ever   greater   levels   of   efficiency    over   the   years,    with   the
    resultant rules serving as a convenient shorthand for the complex
    calculations of compiled experience.         In examining the underlying
    logic of the Blackwall factors, we do not take lightly their role
    in summarizing this most succinct and practical of legal processes.
    reprinted with English translation in 4 Black Book of the Admiralty
    522, 536-37 (Twiss ed. 1876).
    Inspired by Trani and other like-minded port towns of the
    Mediterranean, the French dukedom of Guienne adopted a similar law
    some two centuries later:
    If a vessel departing with her lading from Bordeaux, or
    any other place, happens in the course of her voyage, to
    be rendered unfit to proceed therein . . . [and] if the
    master can readily repair the vessel, he may do it . . .
    and if he has promised the people who helped him to save
    the ship the third, or the half part of the goods for the
    danger they ran, the judicatures of the country should
    consider the pains and trouble they have been at, and
    reward them accordingly, without any regard to the
    promises made them.
    Roll d’Oleron art. IV, reprinted in English translation with
    commentary in 
    30 F. Cas. 1171
    , 1172.    When Richard I inherited
    Guienne from his mother, Duchess Eleanor, he introduced the
    doctrine of salvage (and the rest of the Laws of Oleron, as they
    came to be known) into the English 
    law. 30 F. Cas. at 1171
    .
    19
    Still, in the light of the United States’s challenge in the instant
    case, we think that this is an appropriate time for the underlying
    rationale of Justice Clifford’s venerable factors to be formally
    recognized.
    2
    Fortunately, the principles underlying the Blackwall factors
    have not     escaped      the   attention     of   our   most      prominent   modern
    scholars.     See William M. Landes & Richard A. Posner, Salvors,
    Finders, Good Samaritans, and Other Rescuers: An Economic Study of
    Law and Altruism, 7 J. Leg. Stud. 83 (1978).                    Beginning with our
    first principle that the law of salvage seeks to preserve society’s
    resources,    they     explain    that   “the      purpose    of    [court-granted]
    salvage    awards    is    to   encourage      rescues   in     settings   of   high
    transaction costs by simulating the conditions and outcomes of a
    competitive market.”        
    Id. at 100.
          In an ideal world, every meeting
    of salvor and salvee would result in a freely negotiated contract
    for salvage services priced at a competitive level.12                    
    Id. at 89.
    In the real world, however, most meetings of salvor and salvee
    cannot be resolved in this fashion.
    To accommodate this reality, the law of salvage aims to create
    a post-hoc solution that will induce the parties to save the ship
    12
    Provided, of course, that it makes sense for a salvage to
    happen at all. As explained in greater detail below, if the costs
    of performing a salvage are too high or the benefits to be derived
    too low, the parties might well agree to call it a day and let the
    sea claim its prize.
    20
    without first agreeing on terms.        
    Id. at 100.
      As Justice Clifford
    himself noted, “[c]ompensation as salvage is . . . viewed by the
    admiralty courts . . . as a reward given for perilous services,
    voluntarily rendered, and as an inducement to seamen and others to
    embark in such undertakings to save life and property.”              The
    
    Blackwall, 77 U.S. at 14
    (emphasis added).
    In order properly to induce the salvor (and salvee) to act,
    however, the law must provide for a proper and reasonable salvage
    award, one that gives neither the salvor too little incentive to do
    the salvage properly, nor the salvee too little reason to care if
    his property is saved.      Landes & Posner, 7 J. Leg. Stud. at 102.
    By definition, this “efficient” fee is the one that would have been
    reached by the parties through voluntary negotiation in an open and
    competitive market, and its value will depend on a number of
    factual considerations.        
    Id. By far
    the most important of these
    considerations, however, will be the cost13 to potential salvors of
    performing the service and the benefit to the salvee of it being
    performed; obviously, no voluntary salvor would be willing to
    perform a salvage for less than it would cost him to do it, just as
    no salvee would agree to pay more for a salvage than the loss he
    could thereby avoid.     
    Id. In a
    voluntary agreement between salvor
    and salvee, therefore, as in any agreement between arm’s-length
    13
    Including risk-based costs.
    21
    parties in any context, the twin considerations of cost and benefit
    will form the poles of negotiation between which any fair bargain
    must be struck.   Should the gap between cost and benefit prove
    illusory, as when the costs of the service outweigh the benefits to
    be derived, then no agreement will be possible, and the parties
    must go their separate ways.
    With this background in mind, it becomes immediately apparent
    that the Blackwall factors represent an explicit guide for the
    court to use in measuring these two most significant considerations
    for voluntary negotiation in the salvage context.   
    Id. at 101-04;
    see also 
    Allseas, 812 F.2d at 246
    (“the[] factors guide the trial
    court in fulfilling the public policy behind salvage awards”).
    Labor expended by the salvors (1.), their promptitude and skill
    (2.), value of the salving property (3.), risk to the salvors (4.),
    and risk to the salved property (6.)14 are all direct or indirect
    measures of the actual cost to the salvor of performing the salvage
    in question, which should in turn be at least indicative of the
    costs that would have prevailed.     Correspondingly, value of the
    14
    Because the salvor gets nothing for an unsuccessful rescue,
    see The 
    Sabine, 101 U.S. at 384
    , one of his legitimate costs is
    that risk. To even things out, the salvor will want to receive a
    premium in the instances where he is successful.      See Landes &
    Posner, 7 J. Leg. Stud. at 101.       Although not of particular
    relevance to this case, this circumstance is reflected in Justice
    Clifford’s well known statement that salvage is not to be
    calculated “merely as pay, on the principle of a quantum meruit, or
    as a remuneration pro opere et labore.” The 
    Blackwall, 77 U.S. at 14
    .
    22
    salved property (5.) and risk to the salved property (6.) are
    measures of the benefit that the salvage has conferred on the
    salvee.    By giving the court a framework in which to analyze cost
    and benefit in the salvage context, the Blackwall factors plainly
    intend to guide it in a rational process of determining and
    weighing the costs and benefits of the particular transaction so
    that the award chosen will give the proper inducement to the saving
    of life and property.
    3
    With this rationale in mind, we turn to the specifics of the
    United States’s initial argument.                There are three parts, all
    revolving around a core contention that the district court erred in
    its general assessment and application of the Blackwall factors.
    Essentially, the United States argues that the court erred: (a) by
    giving too much weight to the value of the salved property; (b) by
    counting the potential for environmental liability as risk to the
    salvors;    and   (c)    by   using   a    percentage    of    the    salved   value
    ultimately to fix the award.           We address each point in turn.
    (a)
    The United States first complains that the district court gave
    too much weight to the fifth factor--value of the salved property--
    by ranking it second in its assessment of the considerations
    bearing    upon   an    award.    In      the   light   of    our    just-concluded
    23
    explication of the function of that factor, this contention is
    readily seen to be wholly lacking in merit.
    As the principal measure of the benefit of the salvage to the
    salvee, the fifth is clearly one of the most important of the
    Blackwall factors, and must be accorded substantial deference in
    the calculation of any award.            As our above discussion begins to
    clarify, salvage awards are not based on the altruistic principle
    of good samaritanism--that virtue is its own inducement and its own
    reward.        To   paraphrase     and   distill    its    many   distinguished
    commentators, the very object of the law of salvage is to provide
    an economic inducement to seamen and others to save property for
    the good of society by bestowing a fitting reward for their
    services in the courts of justice.            It is profit, not principle,
    that is the driving force behind the law of salvage, and the
    question for the court is simply what amount of profit is fitting
    in the case before it.            The general economic reality is simply
    that, the greater the value of the threatened property, the greater
    the potential loss, and, consequently, the more the salvee would be
    willing   to    pay   to   save   that   property   from    destruction.     To
    approximate properly the incentive that the salvee himself would
    offer, it follows that the law of salvage must generally grant its
    highest awards where the property has highest value (assuming the
    24
    other factors remain constant).15    See Landes & Posner, 7 J. Leg.
    Stud. at 103-04.16
    In setting the price for the salvage service, therefore, the
    court must consider--and consider primarily--the benefit that the
    service conferred on the recipient.   In a case like the one before
    us, where the benefits of the salvage are numerically so far in
    excess of the costs--that is, the value of the property so high and
    the risk of loss so great--this primary consideration becomes
    dispositive.   We are therefore confident that the district court
    did not overly emphasize the fifth factor in its analysis in this
    case, and are skeptical that an overemphasis would have been
    possible.   See also Platoro Ltd. v. The Unidentified Remains of a
    Vessel, Her Cargo, Tackle, and Furniture, in Cause of Salvage,
    15
    Indeed, the only one of the factors that can arguably be said
    to carry greater weight in this analysis is, as the district court
    correctly concluded, the sixth--risk to the salved property--for it
    is the other component of benefit conferred (i.e., the greater or
    lesser the threat of loss, the greater or lesser the benefit, and,
    consequently, the greater or lesser the price for the salvage
    service). Where, as here, the risk is essentially conceded to have
    been a 100 percent chance of total loss, the value of the salved
    property obviously takes on added significance in measuring
    benefit.
    16
    To those who would generally emphasize the cost factors over
    benefit, we can only respond that no seller truly operates on the
    principle of selling at cost; a seller is induced to provide his
    goods or services by the opportunity for profit.       The strong
    influence of benefit (as determined by the value of the property
    and the risk of loss) will often allow the salvor to extract a
    significant amount of profit in a voluntary transaction, and the
    law of salvage must reflect this circumstance, because it serves
    the very purpose of the law of salvage to provide the correct
    amount of incentive for the saving of property in every instance.
    25
    Civil and Maritime, 
    965 F.2d 893
    , 904 n.16 (5th Cir. 1983); Norris
    § 237; Gilmore & Black at 560 (all ranking the factors as the
    district court did here, with the sixth and fifth factors being the
    first and second most important, respectively).
    (b)
    The United States next argues that the district court erred by
    counting the risk of environmental liability as risk to the salvors
    under the fourth factor, when it should more properly have counted
    against them in some way.    There is no merit to this contention
    either.
    As just discussed, the fourth factor is intended to provide a
    direct measure of some of the salvor’s actual salvage costs.     In
    this context, there is no principled reason to distinguish between
    the costs imposed by the risk of injury or death, and those costs
    imposed by the risk of negligence liability or strict environmental
    damage liability.   All are actual costs to the salvor, and he would
    presumably be unwilling to perform the salvage service without
    their recompense.    For this reason, the risk of environmental
    liability was properly counted under the rubric of the fourth
    factor.17
    17
    To the extent the United States is actually arguing that
    maritime law be altered to reduce the incentive for overeager
    salvors to wreck environmental havoc in pursuit of their prize, we
    note that there is no need for such a change in the law. As the
    United States itself admits, applicable law already made Margate
    strictly and completely liable for any oil spill that might have
    resulted from the salvage operation.       See, e.g., 33 U.S.C.
    26
    This analysis is not altered by the fact that the district
    court   did   briefly     consider   the      extra-Blackwall     environmental
    protection factor announced in Trico.               That case announced an
    additional factor, general protection of the environment by the
    salvors, 
    see 809 F. Supp. at 443
    , which has never been endorsed by
    this court.      In this case, the district court concluded that the
    salvors    did     not   achieve   any    significant    protection     of    the
    environment, and therefore it did not apply the factor.                      That
    decision did not preclude the court from properly considering all
    of   the   legal    risks   that   Margate      incurred,   environmental      or
    otherwise, under the rubric of the traditional factors.
    (c)
    Finally,     and   most   significantly,     the   United    States    also
    complains that the district court erred by using a percentage of
    the salved value in its ultimate calculation of the salvage award.
    There is no merit to this contention either.
    § 2702(a) (“Notwithstanding any other provision or rule of
    law . . ., each responsible party for a vessel or a facility from
    which oil is discharged . . . into or upon the navigable waters or
    adjoining shorelines . . . is liable for the removal costs and
    damages . . . that result from such incident.”); see also 33 U.S.C.
    § 2718(c).     As such, the environment was and is adequately
    protected, and there is no need to conscript admiralty law for that
    purpose. Putting this concern to one side, Margate was entitled to
    the benefit of all the calculated risks it ran in the determination
    of its award. This is not to say, of course, that any amount of
    environmental risk could justify an award for more than the value
    of the salved property.      The maximum limitations and general
    principles of salvage apply regardless.
    27
    We note at the outset that this court itself applied a
    percentage-based calculation in modifying an award in our most
    recent salvage case.             See 
    Allseas, 812 F.2d at 247
    .               Furthermore,
    and   as     we   just    stated       above,     our    analysis      of   the     economic
    foundations of the Blackwall rule indicates that the value of the
    salved property is one of the most important of the factors.                               The
    most natural way to effectuate its salient character is simply to
    make the award a function of that value.                   See Landes & Posner, 7 J.
    Leg. Stud. at 103-04 (concluding that this is what courts have
    correctly done); accord Gilmore & Black at 563.                        Indeed, since the
    era of the Rhodian law itself,18 courts have applied percentages of
    salved value in calculating awards.                     Although Justice Clifford’s
    opinion in The Blackwall itself heralded an end to the earlier
    practice of       using     a    fixed    percentage       or    “moiety”         across   all
    situations, see Gilmore & Black at 563; Jones v. Sea Tow Services
    Freeport NY Inc., 
    30 F.3d 360
    , 364 (2d Cir. 1994); The Kia Ora, 
    252 F. 507
    , 511 (4th Cir. 1918), we see no reason why the district
    court may not use the other five factors to set a customized
    percentage to be applied to the salved value for purposes of
    calculating       an     award    in   the   case       before   it.        See    Compagnie
    Commerciale de Transport à Vapeur Francaise v. Charente Steamship
    Co., 
    60 F. 921
    (5th Cir. 1893) (acknowledging the incorrectness of
    the fixed percentage method, yet upholding a customized percentage
    18
    See note 11.
    28
    award).    Based    on   our   interpretation    of   the   purpose   of    the
    Blackwall factors, we can indeed think of no more appropriate way
    to effectuate their goals.
    Consistent with our earlier analysis of the factors, we
    therefore expressly state (to the extent that the issue may have
    been in doubt) that an approved method for calculating salvage
    awards is to use the first, second, third, fourth, and sixth
    factors to arrive at a percentage to be applied to the fifth
    factor, salved value, for purposes of establishing the award.               In
    setting the percentage, some care should of course be taken to stay
    within the bounds of historical practice, see Section 
    C, supra
    , and
    to account for all of the relevant circumstances of the specific
    salvage at issue.    The predominant consideration, however, should
    always be to arrive at an award that reasonably reflects the price
    upon which the parties would have agreed.          To the extent that the
    district   court    merely     applied    this   formula    and   adopted    a
    calculation based upon a percentage of salved value, it committed
    no abuse of discretion in this case.
    (d)
    Although none of the United States’s own arguments with regard
    to interpretation of the factors bears any fruit, we feel compelled
    to raise one additional concern that has been fairly implicated,
    even if not squarely addressed.
    29
    For what the district court did in this case goes just a bit
    beyond the approach that we have outlined and approved.            The court
    first held that the Blackwall factors indicated an award of 12.5%
    of the salved value in this case.             So far, so good.19      After
    determining that the salved value was $53 million, however, the
    court also noted that, even if the value were actually lower, as
    the United States argued, the dollar amount of the award would
    remain    the   same,   as   the   court   would   adjust   the   percentage
    accordingly.
    Based on our above interpretation of the Blackwall factors, we
    cannot approve this alternate holding.         To do so would completely
    vitiate the effect of the fifth factor, and it is clear that such
    a holding would exceed the district court’s discretion.            Under our
    longstanding precedent, the district court is bound to apply all of
    the factors.     
    Allseas, 812 F.2d at 246
    ; 
    Platoro, 695 F.2d at 903
    .
    Furthermore, as the often critical measure of the arm’s-length
    salvage price that the Blackwall rule attempts to ascertain, it is
    clear that value of the salved property is one of the most
    important of the factors, and the one that truly cannot be ignored.
    To the extent that the district court attempted to evade the fifth
    factor by tying the percentage to a fixed dollar amount, we reverse
    that portion of its ruling.        For the remainder of this opinion, we
    19
    At least as to general approach. With regard to the specific
    percentage and overall amount, see Section C, infra.
    30
    may therefore restrict our discussion to the district court’s
    primary holding that an award of 12.5% of the salved value was
    appropriate, and that this figure was approximately $6.4 million.
    To determine whether that holding may be allowed to stand, we
    must consider the United States’s two remaining major complaints,
    i.e., that the value assigned to ET-70 was a clear error, and that
    the overall award was excessive both as to percentage and total
    dollar value.   We address each in turn.
    B
    The United States’s second major contention is that the
    district court clearly erred in its valuation of ET-70.      In this
    complaint, we must agree.
    1
    At the outset, we note that “[i]n reviewing a district court’s
    valuation . . . in a bench trial, we must accept all factual
    findings unless clearly erroneous.”      E.I. DuPont de Nemours & Co.
    v. Robin Hood Shifting & Fleeting Service, Inc., 
    899 F.2d 377
    , 379
    (5th Cir. 1990).   Nonetheless, where valuation is concerned, the
    district court’s methodology must be based upon principles that
    reflect sound reasoning.    See, e.g., Compagnie 
    Commerciale, 60 F. at 923-25
    .   In this case, it was not.
    Generally, the value of property for salvage purposes is its
    market value as salved.     See Norris § 263; Gilmore & Black at 561
    n.89a; Nolan v. A.H. Basse Rederiaktieselskab, 
    267 F.2d 584
    , 588
    31
    (3d Cir. 1959).    In the case of a unique good like a space shuttle
    fuel tank, however, this measure is clearly inapposite; as there is
    no market of any kind for space shuttle fuel tanks, there can be no
    market value.
    In this situation, and bearing in mind that ET-70 remained in
    perfect condition despite the trials of the storm, the parties now
    agree that the most appropriate measure of value is “replacement
    cost.”   This conclusion accords with this circuit’s decisions in
    other areas of maritime law.    See, e.g., E.I. DuPont de Nemours &
    
    Co., 899 F.2d at 380
    (in maritime tort context, “[w]hen no market
    value exists for a vessel, ‘other evidence such as replacement cost
    . . . can also be considered’”) (quoting King Fisher Marine
    Service, Inc. v. NP Sunbonnet, 
    724 F.2d 1181
    , 1185 (5th Cir.
    1984)); cf. The F.I. Robinson, 
    2 F. Supp. 644
    , 645 (E.D.N.Y. 1933)
    (market value preeminent, but reproduction cost may be considered
    in its absence).    The question becomes how replacement cost is to
    be determined.
    The United States argues that the district court erred by
    using the DD-250 cost of ET-71 to measure the replacement cost of
    ET-70.   It contends that the court should have based its valuation
    on what it would actually have cost NASA to purchase a replacement
    tank, and that this figure was conclusively established to be $19
    million by the 1992 option.
    2
    32
    Based on our earlier discussion of the purposes of salvage
    law, we are convinced that the United States is quite correct, at
    least in part.   The purpose of establishing the value of the salved
    property is to ascertain what benefit the salvage service conferred
    on the salvee; what we wish to know, in the end, is what the salvee
    was saved from so that we may establish what he reasonably would
    have paid for the benefit of the saving.        Where the benefit to the
    salvee must be measured by the replacement cost of the salved
    property, that figure should reflect the contemporary price to the
    salvee of actual replacement.          In this case, that price would
    simply be the amount that NASA would actually have had to pay
    Martin Marietta for them to make a new ET-70.
    The district court made no effort to ascertain this figure,
    despite ample evidence in the record.          Instead, it engaged in a
    semantic analysis of the literal meaning of the word “replacement,”
    an   analysis   that   failed   to   capture   the   economic   reality   of
    determining actual replacement costs.          If a party has several of
    something, and one is destroyed, his substitution of a second thing
    from his inventory simply does not constitute a “replacement” of
    the destroyed item for valuation purposes, since the party owned
    the “replacement” all along.         In this case, NASA would not have
    replaced ET-70 by using ET-71 on its designated mission; in the
    end, NASA would still have had one less tank in its inventory than
    it had before the storm.        The question the district court should
    33
    have asked is what it would have cost NASA to get Martin Marietta
    to build another tank.         This, in the end, was the replacement
    expense that NASA was saved from by Captain Strong’s decisive
    action.
    On this point, the evidence was absolutely undisputed that
    NASA could have purchased an additional tank for approximately $19
    million20 in out of pocket expense at the time of the salvage.
    Martin Marietta had made a binding offer to produce up to four
    additional tanks for this price, and although the offer had been
    recently withdrawn, there was no evidence to suggest that it no
    longer accurately reflected what Martin Marietta would charge.
    True,     the   district    court    held   that    the   “option”   was   too
    “speculative”     to   be   relied   on.     This    finding,   however,   was
    completely at odds with the record.                In the light of all the
    evidence, we are convinced that it was in clear error.
    We find this to be the case principally because the “option”
    was not really an option at all, but simply a firm offer.                  It
    represented Martin Marietta’s unilateral offer to produce up to
    four additional tanks for a price certain, and was not in any
    20
    This lower price was the natural result of increased
    economies of scale and fixed overhead items that had already been
    paid for.    It represented Martin Marietta’s marginal cost of
    producing an additional tank, which was substantially lowered by
    the existence of NASA’s ongoing contract for the original sixty
    tanks. Because NASA had already committed to that contract at the
    time of the salvage, the United States is well justified in
    claiming its benefits in this context, and we reject Margate’s
    argument that this would somehow be unfair.
    34
    respect an option contract supported by separate consideration. As
    such, the fact that it had been technically withdrawn, at NASA’s
    request, six months before the salvage is of no moment.              The only
    thing that might have cast doubt on the accuracy of the option’s
    price would have been evidence of changed circumstances in the
    intervening time period.        As there was no evidence of such changed
    circumstances,    the     district   court    was    bound   to   accept    the
    implications of the option.21
    3
    Unfortunately for the United States, this holding does not
    quite end our inquiry.           For although the “option” price was
    conclusive as to NASA’s probable out of pocket expense in obtaining
    a replacement for ET-70, it did not address all of the probable
    replacement costs.
    Any    calculation    of   replacement   cost    must   be   based    on a
    replacement that is comparable to the lost item in all material
    respects.    E.I. DuPont de Nemours & 
    Co., 899 F.2d at 382
    .          In order
    truly to replace ET-70, Martin Marietta would have had to provide
    NASA with a new tank that incorporated all of the material features
    21
    We note in passing that this holding is somewhat contrary to
    the Third Circuit’s decision in Nolan, which held that the district
    court was allowed to rely on the “invoice” cost of a unique good
    for salvage purposes in the face of conflicting evidence of
    replacement 
    cost. 267 F.2d at 588-89
    . We would suggest that the
    instant case is distinguishable in that it involves absolutely
    uncontradicted evidence of replacement cost.        We also note,
    however, that much of the reasoning behind Nolan does not seem to
    be consistent with sound economic principles.
    35
    of the old one, both physical and temporal.               Although payment of
    the option price would have been sufficient to obtain a new tank
    with all the requisite physical characteristics, that tank would
    have been somewhat faulty as a temporal matter in that it would
    only have become available for use three years after ET-70’s
    designated mission.     In a very real sense, ET-70’s value to NASA
    was enhanced by the fact that it was a completed tank, available
    for immediate use.22    Although the record is clear that no mission
    need    necessarily   have   been   postponed   by    a    delay   in   ET-70’s
    replacement, it is also clear that for three years’ time NASA would
    have had three usable tanks in circulation instead of its desired
    minimum of four. Because ET-70’s existence avoided this three-year
    shortfall, any acceptable replacement plan would have had to
    address it as well.     Because the tank available under the option
    could not have done so,23 it would have been partially defective.
    Where the available replacement is less than comparable in
    some material way, the court must take the defect into account in
    calculating the overall replacement cost.            E.I. DuPont de Nemours
    & 
    Co., 899 F.2d at 382
    (where replacement cost of large unique
    22
    An assessment that is, we note, substantially supported by
    NASA’s haste to have ET-70 delivered, as evidenced by its abject
    unwillingness to allow Orgeron to put into Miami to seek refuge
    from the storm.
    23
    We note that neither party seems to have introduced any
    evidence that there was a way to obtain a replacement tank any
    faster than under the terms of the option.
    36
    barge was partially based on multiple smaller replacement barges,
    district court should have taken the increased costs associated
    with multiple trips into account).             To complete ET-70’s valuation
    in this case, we must therefore calculate an appropriate addition
    to address NASA’s probable costs in curing the temporal defect. To
    do so, the question this court must ask is exactly how much the
    avoidance of a three-year, one-tank shortfall in NASA’s tank
    circulation plan would have been worth.
    Convenient to our decision today, the evidence on that point
    was undisputed and conclusive, as it came directly from NASA
    itself.      In setting a minimum circulation of four tanks, NASA
    determined that it was worthwhile to have four tanks in circulation
    at all times instead of three.          The reasons for this judgment no
    doubt     included   a   desire   to   allow    for   additional   defects,   a
    commitment to avoid all foreseeable delays, and a host of other
    factors irrelevant to the instant analysis. The important point is
    simply that to fulfill its goals NASA itself decided to immobilize
    approximately $50 million24 in additional capital every year to
    ensure that there were four tanks in circulation instead of three.
    In more colloquial terms, by keeping four tanks in circulation at
    all times instead of three, NASA was making a conscious choice to
    24
    I.e., the approximate amount that NASA actually paid for each
    additional tank during the relevant time period.
    37
    take $50 million from its budget and put it on a shelf instead of
    spending it on other things.
    Although the government is sometimes wont to think otherwise,25
    money is now well known to have a time value.        See Atlantic Mutual
    Ins. Co. v. Commissioner of Internal Revenue, 
    118 S. Ct. 1413
    , 1415
    (1998).    The three-year treasury bill rate on November 15, 1994,
    was 7.41%, and we are confident that the cost to the United States
    of immobilizing $50 million over the three years in question was
    approximately (1.07413 - 1) x $50 million = $12 million.        Whatever
    risks and costs NASA would have incurred by having three tanks in
    circulation instead of four, NASA itself determined that these
    risks were worth about $12 million to avoid.         By rescuing ET-70,
    Captain Strong saved NASA from this $12 million in additional risks
    and costs as well, and it must be counted towards a proper
    valuation of the tank.
    Combining this additional $12 million with the $19,014,479
    figure from the option, we arrive at a total replacement cost for
    ET-70 of approximately $31 million.       We therefore hold that the
    district   court   was   clearly   in   error   in   valuing   ET-70   at
    $51,387,000, and that the correct value was $31 million.          Adding
    the $2 million stipulated value of Poseidon, this leaves a total
    25
    See, e.g., Gore, Inc. v. Glickman, 
    137 F.3d 863
    , 869 (5th
    Cir. 1998).
    38
    value for the salved property of $33 million.26            Applying the
    district   court’s   12.5%     salvage   percentage,     see    Compagnie
    
    Commerciale, 60 F. at 924
    (applying the district court’s choice of
    customized salvage percentage to a corrected salved value in
    computing the ultimate modified award), we are left with a new
    salvage award of $4.125 million.
    C
    With this new figure in hand, we may address the United
    States’s final complaint.      Essentially, the United States argues
    that, even assuming a correct and error-free assessment of the
    Blackwall factors, any award in excess of either $2.5 million or
    10% of the salved value constitutes an abuse of discretion in this
    case. The United States made this argument originally with respect
    to the district court’s $6.4 million/12.5% award. As it is equally
    applicable to our amended $4.125 million/12.5% figure, we must
    briefly address it before we can bring this case to a close.         For
    the reasons that follow, we hold that a $4.125 million/12.5% award
    is not so excessive as to constitute an abuse of discretion in the
    context of this case.
    Consistent   with   our   earlier   analysis   of    the   economic
    principles underlying the law of salvage, the only hard numerical
    26
    In making this admittedly rough-and-ready valuation, we rely
    on the fact that the value of the salved property need not be
    determined with great precision in order to calculate an
    appropriate award, even under the customized percentage method.
    See Compagnie 
    Commerciale, 60 F. at 924
    .
    39
    limitation that this court has ever placed on salvage awards is the
    full value of the salved property.             
    Allseas, 812 F.2d at 246
    -47
    (reducing an award of 150% of the value of the salved property to
    67.5% thereof).      As we have already said, no reasonable salvee
    would ever contract for the salvage of property at a price greater
    than its value.
    For awards, like the current one, that are far below the
    absolute limit of Allseas, we have repeatedly emphasized that the
    determination of the particular amount (or percentage) is a factual
    inquiry best left to the sound discretion of the district court.
    See 
    Allseas, 812 F.2d at 246
    ; 
    Platoro, 695 F.2d at 903
    ; Compania
    Galeana, S.A. v. M/V Caribbean Mara, 
    565 F.2d 358
    , 360 (5th Cir.
    1978).      Where,   as   here,     the   district   court   has    applied   the
    Blackwall    factors      in   an    appropriate     way     with    a   correct
    understanding of their underlying purpose, the only useful review
    that this court can conduct of the ultimate award is a general
    comparison to similar decisions. Indeed, even this limited type of
    review has been criticized by some courts, see, e.g., B.V. Bureau
    
    Wijsmuller, 702 F.2d at 339
    , and we will conduct it in only the
    most deferential and general way.27
    27
    Before embarking upon it, we do note, as have many others,
    that there are essentially two ranges for percentage-based salvage
    awards, one somewhat lower one for property of high value (as
    compared to the costs of the salvor), and one somewhat higher one
    for property of comparatively low value.     See, e.g., Compagnie
    
    Commerciale, 60 F. at 924
    . Although not particularly relevant to
    this case, we note that this anomaly is not inconsistent with an
    40
    After some fairly extensive research, we have compiled a list
    of the nine largest federal salvage awards in comparable high-
    value, high-order cases since the advent of the Blackwall rule.
    All amounts have been adjusted to 1994 dollars on the basis of the
    relevant U.S. Consumer Price Index deflator. See John J. McCusker,
    How Much Is That in Real Money? A Historical Price Index for Use as
    a Deflator of Money Values in the Economy of the United States
    (American Antiquarian Society 1992).
    economic theory of salvage. Where the salved value is particularly
    low compared to the costs of the salvor, the percentage of value
    awarded must be higher in order to assure that the salvor at least
    recovers his costs. For this reason, these low salved value cases
    correctly produce anomalously high percentage awards. See, e.g.,
    
    Allseas, 812 F.2d at 246
    -47 (awarding 67.5% in the case of a
    relatively run-down and low-value salved vessel). For purposes of
    this case, we may obviously constrain our analysis to cases
    involving comparatively high salved values (and low percentage
    awards).
    41
    Total   Date   General Description              Labor      Skill,   Value of   Risk to   Value of   Risk to    Award
    Award   of                                                 etc.     Salving    Salvors   Salved     Salved     as % of
    Salv                                                        Property             Property   Property   Salved
    $3.5m   1941   German merchant vessel           67 men     High     $130.2m    Avg       $22.7m     High and   15.4%
    scuttled and abandoned by        11 days                                             Imminent
    crew; U.S. Navy boarding
    party repaired scuttling
    damage and navigated her
    into port. The Omaha, 71 F.
    Supp. 314 (D. P.R. 1947).
    $2.5m   1896   Large liner aground on New       205 men    High     $7.6m      Low       $37.8m     High but   6.6%
    Jersey beach; professional       11 days                                             not
    salvors pulled her free. The                                                         Imminent
    St. Paul, 
    82 F. 104
    (S.D.N.Y.
    1897).
    $1.7m   1917   Vessel aground on remote         70 men 6   High     $5.2m      Low       $44.9m     High but   3.8%
    coral reef; professional         days                                                not
    salvors travelled 360 miles                                                          Imminent
    and pulled her free. The Kia
    Ora, 
    252 F. 507
    (4th Cir.
    1918).
    $1.2m   1977   Vessel aground on rocky          $245k      Avg      N/A        Low       $15.9m     Avg        7.5%
    ledge; professional salvors
    removed fuel, laid out
    beaching gear, and refloated
    and towed her some
    distance. B.V. Bureau
    Wijsmuller v. United States,
    
    702 F.2d 333
    (2d Cir. 1983).
    $1.1m   1942   Neutral tanker twice             Minimal    Low      N/A        N/A       $11.0m     High but   10.0%
    torpedoed and abandoned;                                                             not
    U.S. Navy picked up crew                                                             Imminent
    and replaced on board.
    Crew navigated ship to port.
    Usatorre v. Compania
    Argentina Navegacion
    Mihanovich, Ltda., 64 F.
    Supp. 370 (S.D.N.Y. 1945),
    reversed on other grounds,
    
    172 F.2d 434
    (2d Cir. 1949).
    $944k   1983   Vessel aground at remote         1 ship     High     $5.6m      High      $10.8m     High but   8.7%
    location in high winds;          2 days                                              not
    nonprofessional salvors                                                              Imminent
    pulled her free. Vessel then
    fouled her own propeller
    while retrieving mooring line;
    salvors helped to clear.
    Walter Kuhr, Sr. v. Sea-
    Alaska Products, Inc., 
    1986 A.M.C. 2299
    (W.D. Wash.
    1985).
    $825k   1968   Vessel afire and abandoned;      1 ship     High     $20.2m     Avg       $7.8m      High and   10.6%
    nonprofessional salvors          26 hours                                            Imminent
    boarded and kept her from
    sinking, then made
    unsuccessful attempt to tow.
    St. Paul Marine Trans. Corp.
    v. Cerro Sales Corp., 
    505 F.2d 1115
    (9th Cir. 1974).
    $793k   1919   Large liner holed by collision   186 men    Low      $2.1m      N/A       $12.4m     High but   6.4%
    and beached; professional        63 hours                                            not
    salvors (and others) towed,                                                          Imminent
    beached, patched, refloated,
    and navigated her into port.
    Merritt & Chapman Derrick &
    Wrecking Co. v. United
    States, 
    63 Ct. Cl. 297
    (1927).
    $750k   1880   Vessel aground on Virginia       100 men    High     N/A        Low       $3.0m      High but   25.0%
    beach; professional salvors      7 days                                              not
    pulled her free. The                                                                 Imminent
    Sandringham, 
    10 F. 556
                   (E.D. Va. 1882).
    42
    For this case, a comparable listing is:
    Total        Date   General Description         Labor   Skill,   Value of   Risk to   Value of   Risk to    Award
    Award        of                                         etc.     Salving    Salvors   Salved     Salved     as % of
    Salv                                                Property             Property   Property   Salved
    $4.125m      1994   Two vessels adrift and in   2 1/3   High     $7.5m      High      $33.0m     High and   12.5%
    imminent danger of          days                                             Imminent
    grounding in severe
    storm. Nonprofessional
    salvors ventured into
    perilous shoal waters and
    towed vessels to safety.
    In the context of these past awards, it is difficult to say
    that the reduced $4.125 million/12.5% award here is wrong, much
    less an abuse of discretion.                            The range of percentages appears to
    run from about 4% to 25%,28 and the percentage here is smack in the
    middle of that range. Furthermore, as the district court noted, it
    is rare that a salvage action would involve such high ratings on
    each of the factors as was the case here.                                          The only case in the
    list that is fairly comparable in this respect is The Omaha, and
    there        the    salvors             did      not    incur        great         risk    to     themselves.
    Furthermore, that case resulted in a higher award in percentage
    terms.        Although the dollar amount of the award in this case would
    still appear to be the highest ever, even after our modification,
    in the light of all its factors, it simply does not look out of
    place in the context of high-value, high-order salvage cases.                                                   For
    28
    Which is consistent with the judgment of most modern
    commentators, see, e.g., Gilmore & Black at 563 (finding an upper
    limit of about 20% in high-value cases), and the practice of courts
    since the time of the Rhodian law itself, see note 
    11, supra
    .
    43
    this reason, it is not so excessive as to constitute an abuse of
    discretion.
    V
    CONCLUSION
    In conclusion, we AFFIRM the district court’s interpretation
    of the Blackwall factors and choice of salvage percentage.                     In
    particular, we AFFIRM and sanction the district court’s decision to
    use   the   first,   second,   third,      fourth,     and   sixth   factors   to
    calculate a percentage to be applied to the fifth factor, salved
    value, for purposes of fixing an award, because this practice is
    inherently consistent with the underlying purpose of salvage awards
    and the Blackwall factors (i.e., to simulate the price that the
    parties would have agreed to in a competitive negotiated setting).
    We also AFFIRM the district court’s assessment of environmental
    liability as a risk properly considered under the rubric of the
    fourth factor.       Finally, we also AFFIRM the district court’s
    specific    choice   of   percentage       in   this   case,   because   it    is
    consistent with the historical pattern in cases of similar nature,
    and therefore is not so excessive as to constitute an abuse of
    discretion.    We REVERSE the judgment of the district court as to
    the value of the salved property, however, and must therefore
    MODIFY its ultimate salvage award.              For the stated reasons, we
    REDUCE Margate’s salvage award from $6,406,440 to 4,125,000 and
    direct that judgment be entered in that amount.
    44
    AFFIRMED in part, REVERSED in part, award REDUCED, and RENDERED.
    45