I have not lost steering on a boat before. With two engines, that is nice because you can power them differently to cause turning, but for a boat that may only have one engine that uses a rudder to steer that loses the ability to use the rudder, i would imagine that would be much more difficult to handle. the only think i could think of is if your motor is still working, and if you have a paddle on board, you could stick the paddle in the water on either the port or starboard sides to help steer (obviously the motor would be at a slow probably no wake speed)... but yeah other than that, i'm not really sure... I don't own a boat and only been on them a handful of times and they were all outboard motor boats...