[REQ] Must maintain forward momentum or sink

[Sailor Steve]

Originally Posted by Capt Jack Harkness

Well if it handles differently at different depths, then perhaps you can have positive bouyancy at shallow depth and negative when running deep... Always wanted to see this feature, though, after seeing Run Silent, Run Deep.

Actually what I'd like to see is a randomized version. Maybe have a greater chance of the correct behaviour at the correct depths, but also have a random chance of the boat going up, down, or not at all. Reflects imperfect trim.