Warning - Marine plywood Caribbean
If you need to use plywood or any wood acquired in the Caribbean be careful and seek some knowable advice as to what to get.
When we redid the fuel tanks in Grenada in 2013 marine plywood was supplied by the yard for the interior sidewalls covering the tanks in the engine room. To this plywood was mounted all the electrical connections, inverters, battery switches, bus bars etc. on one side, and all the fuel connections, Racors, fuel polisher, hydraulic tank etc on the other side.
Seems the yard supplied cheaper plywood which unfortunately was infested when purchased. Get conflicting stories, but the US Douglas fir plywood common for marine plywood in the US is a problem here in the Caribbean. Hardwood marine plywood costs between $180 and $280 US a 4ft x 8ft sheet here in St. Lucia. The bugs are not as attracted to this plywood.
Common US treated lumber is not used for studs either. A hard wood, don't remember the name, is used.
If you are having work done in the Caribbean, don't rely on the yard, verify all the materials and determine independently that it is the correct product to use.
All is well with Bay Pelican now. Systems put back together, my engine room bruises will heal, and the weight I lost working day after day will not be missed.