The Nimrod fleet providing we still have one.
Best job for a Nav in the RAF.
If you have the ability, Captaincy is within reach. If you are now ex-FJ you must have become used to Pilots referring to "my navigator" In maritime you can refer to "my pilots".
Of course, in maritime we have a better breed of Pilots so there is none of that, instead everything is for the benefit of "The Crew"