The vessel is probably at the bottom. They likely left the companion hatch open when they abandoned her, full in the knowledge that the North Atlantic in winter would have done the rest to remove her as a hazard to navigation.

Alternatively, one of the rescuing merchant vessel's crew might have alerted a comrade on another merchant vessel, which could have come along and hoisted the "salvage" aboard, whence it would have quietly disappeared into some officer's "retirement plans."