But I can give them more of a pass than someone without a nautical background, thus still gaining some benefit from their background.A sailor in a new faraway port might have some generic knowledge of wind and tides, but if all her experience was on big age-of-sail dreadnaughts and the only ships here are oar-powered biremes and triremes, her specific knowledge of the ships in this port and how they function and are crewed etc. is going to be minimal at best: you can't just give her a free pass.