cored

I am reposting to make this question a bit more clear. I was wondering if anyone can tell me if the base of the lifeline stanchions on my 1990 E-28 run through a cored area or is the area beneath the stanchions solid fiberglass? I know that there is fiberglass above and below and probably a...

I am repairing a fracture/crack in the aft section of the hull, starboard side, aft of the trailing edge of the keel about halfway to the waterline. The area that was ground out is about 18" top to bottom and 3" wide. The core was wet here and the inside layer of glass was fractured as well...

i am the owner of a 74 35 II...i want to install a depth gauge. if the hull is cored then i need to install a thru hull... if its solid i can install a thru the hull transducer. my questions are: 1. is the hull solid or cored 2. if you installed a thru hull for the depth where did you...