I'd like an answer to that also, as i don't have it checked.. and never did in other versions of GWX. I did manage to revive my career because Commander set me as retired and continued on patrol 2, sinking 3 destroyers so far that harrassed me near Scapa flow.
Almost didn't make it back to port on Patrol 1 either.. fuel tank was on fumes, and this run to AM19 will be another long haul with little gas to spare.
Tool.