StianOvrevage

I agree that in general that would be something to avoid. But in my case the probability * consequence math for the usual scenarios is still fairly low.

When untying it only cuts once in a while when doing the bow lines and I'm still attached at the stern, so no risk there.

When preparing to dock it's only if I need to find and prepare extra rope from some of the most aft compartments, which I do well ahead of when I need them and not during "critical phases of operation".

If I expect to be running around a lot during docking I take the FOB off and place it on the dashboard. I don't leave the helm unless the gear is in neutral, and if I fall in the water I'm usually within 20 meters of land which I'm fairly certain I'd be able to reach :)

That's a very good suggestion actually. It's probably a very helpful, and I expect humbling, exercise.

(Have to remember to teach the buddy how to override the MOB-system so that he can actually start the engine after I go in the water though, lest it become a real situation)

I installed the Fell Marine Mob+ myself on my 23 foot day cruiser a year ago and it works very well.

The only problem I've had is false positive cut-offs when I'm on the dock untying or when I prepare to dock and I use the arm with the wireless FOB on in the rear compartments of the boat.

I could probably fix it by angling the antennae so that it was upright instead of pointing out horizontally behind the base unit, but TBH it's such a infrequent issue and only happens at no/low speed anyway that I haven't bothered.

On the plus side at least I know that it does cut the engine and probably would in a real situation as well.