U.S. Supreme Court Issues Safe Berth Warranty Decision

Jeffrey S. Moller

The final decision in the ATHOS I saga has recently been issued by the U.S. Supreme Court, upholding the decision of the U. S. Court of Appeals for the Third Circuit to the effect that a plain reading of the language found in the ASBATANKVOY charter form creates a warranty of safety rather than merely a duty of due diligence.


The facts were these: the voyage charterer of the fully laden tanker ATHOS I was also the owner of the refining complex in Paulsboro, New Jersey, which the vessel was approaching when its (single skin) hull was torn open by an anchor that had been lost/abandoned by some unknown vessel. The anchor was lying on the bottom of a federally-maintained anchorage ground through which the ship had to transit on its way to the berth from the federally-maintained ship channel. The anchor, which had not been previously discovered or removed by the U.S. Army Corps of Engineers, had evidently laid on the bottom with its flukes down for at least three years, during which time many ships had passed over it without incident. But, at some time prior to the ATHOS’ arrival, the anchor was somehow flipped over so that its flukes could be in position to rake the ATHOS I’s hull and tear open a number of its cargo tanks. ATHOS I’s cargo was Venezuelan heavy crude oil, which the charterer/wharfinger was importing to use in making asphalt. Because the anchorage was maintained by the federal government, the charterer/wharfinger had never expected that the anchorage would have obstructions within it so, although passage through the anchorage en route the berth commonly involved passage through the anchorage, the charterer/wharfinger never took steps on its own to conduct sonar surveys. An estimated 263,000 gallons of Venezuelan crude oil was released into the Delaware River when ATHOS I was punctured, giving rise to enormous (U.S. $180 million+) cleanup and business interruption expenses.

The vessel was the subject of two charter parties. The first was a time charter between the vessel’s owner and a fleet operating entity under which the latter agreed to exercise “due diligence” to ensure that the vessel was only sent to “safe places.” The time charterer then subchartered the vessel under a voyage charter to the operator of the Paulsboro refinery on the ASBATANKVOY form, which contained a “safe berth” or “safe berth” warranty that was not expressly limited to the exercise of due diligence. The owner of the ship was not a direct party to this subcharter. The owner of the ship remained its operator and was therefore the responsible party for the consequences of the oil spill under the Oil Pollution Act of 1990.

The origin of the anchor being unknown, the shipowner sued the charterer/wharfinger for breaches of both the contractual “warranty of safe berth” (Charterer “shall select . . .always safely afloat”) found in the ASBATANKVOY charter party and of the maritime law duty of care to properly maintain its berth and the approach(es) thereto. The United States was a party to the suit both for recovery of funds from the national Oil Spill Liability Trust Fund, which had made partial reimbursement payments to the innocent ATHOS I and her underwriters, and as the subject of a counterclaim for having failed to properly maintain the anchorage.

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