This admiralty action arises out of the collision in the Puget Sound between the Bowfin, owned by Western Pioneer, and the barge Lucky Buck, owned by Claimant Signature Seafoods. Western Pioneer initiated this Limitation of Liability Act1 proceeding following the collision. The district court held that Western Pioneer was entitled to limit its liability under the Act. We affirm.

The Limitation of Liability Act limits shipowner liability arising from the unseaworthiness of the shipowner’s vessel or the negligence of the vessel’s crew unless the condition of unseaworthiness or the act of negligence was within the shipowner’s “privity or knowledge.”2 The shipowner has the burden of proving that the act or condition was outside its privity or knowledge after the claimant first establishes what act or condition caused the loss.3 In this case, the district court found that the sole proximate cause of the collision was “spontaneous negligent navigational errors” of the master of the tug and not the master’s fatigue (for which the Claimants urged Western Pioneer was responsible). That finding is not clearly erroneous.4

We reject the Claimants’ contention that, by admitting that its master was at fault, Western Pioneer assumed the burden of negating its privity or knowledge of other acts by its master. The claimant retains the burden of proving what act caused the loss even if the shipowner concedes that its crew was negligent.5 The district court’s finding resolved the limitation issues.

AFFIRMED.