Capt.Mooron wrote:
So Bob... what type of sound are you looking for when applying a whack with
a 28oz waffle faced framing hammer to the gelcoat??


He's looking for the sound of the seller and or broker clocking him
upside the head.


I've seen a surveyor use a rawhide mallet and a stethoscope before.....
sort of weird!


No stethoscope needed. A rawhide mallet makes sense.

I know one surveyor who has a little wooden judges gavel... that's a
classy touch. Most that I've seen use the handle of a screwdriver.

And as usual, Boobsy hasn't got a clue. Maybe he read this in a sailing
magazine, but the way to "sound" any lamination (not just cored) is tap
in a grid pattern, listening for changes in the sound which are not
accountable by structure. In other words, if you get a "pok... pok...
pok... thud" and there is a stringer or beam or some structural
difference, then it's OK. If not, then you do a tighter grid & try to
map out the problem.

It's not rocket science, and anybody trying it with a hammer is friggin
dunce who should not be allowed near a boat.

DSK