On Fri, 10 Aug 2007 18:29:15 -0400, Jeff wrote:

the
fridge, radar, and autopilot must be turned off if the engine is
running and the batteries are not fully charged?

Of course not. It is important however to get the batteries back up
to at least the 80 or 90% level in a reasonable length of time. If
the alternator belts are slipping/burning at less than the 100 amp
level, something is wrong, probably belt tension or belt type. Over
100 amps dual belts are generally necessary.