I have a 37' Newburyport 1987 trawler that I just bought.
My question is last night while filling the water tank, I opened the inspection hatch in the aft stateroom to check for leaks at the deck fill. I noticed that on top of the hull was a bed of sand-like substance. It appeared to have been laid in and around the seems of the cabin sole and walls. Does anyone know if this is common in these types of trawelers and if so, what was this used for? Stability, insulation or what?