I use rangefinders hunting. My experience is you can't range animals figure out your shot and pick the gun up before he moves very often. I mostly use them in a stand to pre range distances to points. Identify what's too far to shoot so I will know what to pass on what to go for.
Have docked a lot of boats assistance towing many relying on the disabled vessels crew or my seaman when I can't see well. I can't imagine a range finder is going to be fast enough to give any useful information . It's just like hunting in reverse. Target is stationary you are moving, by the time he's figured it out distance has changed. They don't pick up small targets well either. Range the edge of a pier it's probably going to find the building on the pier
I asked for distances in boat lengths or widths and made it a point to have the seamen call it even when not needed. That's the way I was trained as a young seaman. New situation tow or dock best practice is to go slow real slow. Close slow less chance of trouble.