Re: WTF is this?
Interesting assumptions all. I think I can narrow it down to two possibilities. 1. The boat, until just recently, was equipped with a LORAN receiver. 2. I have a switch on my fuse panel labeled "Holding Tank", but I know for certain that it does not have one and that the only pump attached to the head is a manual bilge type pump, which may, or may not, have been original. Could it have been originally equipped with a powered macerator pump, given the "Holding Tank" switch? I'll be at the boat this afternoon to try to get to the bottom of this mystery....
EDIT: Some food for thought...the PO, who owned the boat for more than 30 years, was an Electrical Engineer for the aircraft industry here in SoCal...
1969 S&S Yankee Dolphin 24 "Avri Ellis"
Last edited by ericb760; 09-30-2013 at 12:28 PM.