- Joined
- Nov 25, 2015
- Messages
- 8,372
so, I'm going to assume that the ship may have lost power long enough that it was travelling the speed of the river, in that case, a rudder maybe useless. The rudder would not have any directional control at 0 water speed.Correct me if I am wrong here, but my understanding was that any ship over a certain weight/size had to have mandatory MANUAL primary (rudder) control ability in cases of power loss as well as backup power to any/all secondary manouvering control systems (thrusters) should the use of such systems be required?
While a plane will drop out of the sky, imagine it still flying, if it travels at 0 air speed, the rudder is useless. it needs air flowing over it, the same for water.. fluid dynamics at play.