Actually guys, Nauticat applied the thickest gelcoat on my prior NC33 I had ever seen, as was typical of all the boats they produced from their yard in Finland. It may be slightly less than 3/16" (.1875) but 1/8" (.125) seems right.
I still have a deck section of the solid glass (under teak overlay) I cut out while installing a new windlass, revealing evidence to this fact.
True Blue . . .
sold the Nauticat