We explore captain-ownership and vessel performance in eighteenth-century transatlantic shipping. Although contingent compensation often aligned incentives between captains and ship owners, one difficult-to-contract hazard was threat of capture during wartime. We exploit variation across time and routes to study the relationship between capture threat and captain-ownership. Vessels were more likely to have captain-owners when undertaking wartime voyages on routes susceptible to privateers. Captain-owned vessels were less readily captured than those with non-owner captains, but more likely to forgo voyage profits to preserve the vessel's safety. These results are consistent with multitask agency, where residual claims to asset value rather than control rights influence captain behavior. This article is among the first to empirically isolate mechanisms distinguishing among major strands of organizational economics regarding asset ownership and performance.