"Capt. JG" wrote in
easolutions:

either someone has been
deliberately turning off the A/C (not necessarily maliciously) or
something in the box is tripping the switch

When a breaker trips from overcurrent, it needs to be "reset" by pushing it
into the off position, or pushing a popout button on some breakers.

You talk as if the breaker has just been switched off as you said nothing
about having to reset the breaker before turning it on.

So, I'm thinking deliberately turning it off...saving the marina $$$, a
motivation unto itself.

To turn the breaker off requires a finger to push on one side of the
breaker toggle handle. Coat that side with greasepencil lightly so it's
not very evident. Make the coat smooth so we can see that fingerprint of
the SOB that's flipping the breaker on you. That will let use at least see
"SOMEONE" is flipping it off.

Office supply places also have a permanent staining red ink that won't wash
off. It's available in non-drying printer's ink like they put on a press
with a roller. It takes months to "dry". You could coat the toggle with
that then casually watch marina people's fingers for the indelible red
stain....