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Roger

There is a wiring race molded into the fiberglass subfloor that runs from ~ the starboard fwd corner of the mast to under the chart table. All of the wires are encased in flexible conduit, which is clipped down at 8 inch intervals. There isn't a whole lot of room to work with as you've noted, but it is possible to reach the underside of the wiring race, by sticking your arm in through the little door at the aft end of the pullman.

To access the top of the wiring race, you will have to remove the sole of the forward cabin, the threshold strip between the cabin and the salon, and the starboard cabin sole panel in the main salon. You'll wonder if the Catalina folks ever intended for the large starboard sole panel to be removed, but it does come out with a little bit of twisting and turning. Just make sure you've removed all of the screws, including a couple that are in the middle of the panel, and remove the metal knob on the windlass breaker before you start.

FWIW, when I upgraded my instruments to ST60's I just reused the exisitng ST 50 transducers, They seem to work fine, except the depth sounder seems to quit around 350 feet.

Good luck
Addison

It has been over a year since I've pulled it up, but on TPO, you will see the wiring race if you lift the floorboards. If you have the wiring schematics for your boat, you'll see both the forward and aft race illustrated as diagonal lines with the forward race running from port forward to starboard aft, and the aft race running more or less athwarship from just forward of the head to just forward of the galley.

Most of the forward race is actually in the salon, so if you tip the starboard panel in salon, you'll see it. I may be mistaken about the starting point in the forward cabin, because I had lifted all of my floor boards for refinishing over last winter. I used the opportunity to run the sensor wires for the Accugauge tank monitor sensors from the fwd tanks.

Addison