Flybridge construction Taiwanese trawler
I drilled a new hole above the lower helm position using a hole saw. And, what to my wondering eyes should appear as I lay on the flybridge deck with my head and shoulders stuck through the louvered doors? The deck, which appears to be gel-coated plywood is actually striated or wood-grained gelcoat, on fiberglass, on 3/4" Balsa core, on fiberglass. And then a 3/8" gap. And then a smooth gelcoat surface, on fiberglass, on 3/4" plywood, on fiberglass.
Huh? Why two decks? And, looking up at the bottom of the deck that's visible above the helm, the plywood appears to be in chunks, and looks like Balsa.
I coated out the raw wood and epoxied in a fiberglass tube for passing wire up to the flybridge enclosure. The original tube is full of hydraulic tubing, engine control cables, and the original wiring. A newer tube was put in for Radar and is maxed out.
Pics are the two cores in edge view, then from the top and again from the bottom.