I'm with Minnewaska. When we had a 52' sailboat it made sense. It allowed backing into tight slips, maneuvering in tight spots with little or no crew. When we built a 38, we left it out, cause they take up room, need more batteries, and break. Don't ask me how I know
. Not to pick on bow thrusters exclusively, because everything on a boat breaks.
That said, when I had one tried to use it infrequently. It was noisy and people would "know" I was cheatin