First, flip that AC plugs breaker to the ON position and see if that kills the AC plugs. On some breakers it’s sometimes hard to tell which position is which.
If that doesn’t kill the feed to the AC plugs, flip all the panel breakers to the OFF position and see if any of the other breakers kills the AC plugs. If you find one, there is a labeling problem on the breaker box.
If none of the breakers kill the AC plugs, then it’s either a shorted breaker, or there is a serious wiring
problem on your boat
After safely disabling ALL sources of AC power (shore power, inverter
, generator), test the breaker by removing the breaker wires and checking the action with an ohmeter.
If the breaker is good, you should either trace out the wiring
yourself if you are skilled enough to do it safely, or employ an electrician to do it for you. Until the wiring problem is corrected, you have a serious hazard in case of a short in the AC wiring system.