Yup, ditto that. I found a "spot" that we ended up cutting out and redoing. The boat had an ultrasound, about 120 "spots" were checked, one within inches of "this" spot.
Ultrasounds are OK. Finding a really good steel surveyor
is hard. If he it to do a really, really good job then you will be looking at probably two days.
Steel rusts from the inside out. Get yourself inside, crawl around, look at every spot that could have had some long term drip. From the sink, from a through hull
, from a stanchion fitting, from a bow light. Pull up every floor board, look for newly painted areas.
I developed a good bit of rust on my Murray 33 because of a radar mast
came down the wire, into the base of the mast
, there it dripped down the wire into the hull
. Since I leave the boat in a remote
area it took me 6 years to find the source of the leak. One year it damn near filled the hull to the floor boards. After that I had a bung hole cut in her for insurance