I would expect the
electrical outlets would be wired to 110
shore power, while the
cabin lights, fans,
water pumps, etc would be on the 12v circuit. You should spend some time getting to know your electrical
panels. Also, some of the
wiring on the older boats did not stand the test of time. We had to replace all our 110
wiring with properly tinned wire. A definite fire hazard - especially if you plan to run a space
heater.
Enjoy your
Catalina - with just a little care, she will reward you handsomely!