Re: How can I identify the waterline from inside?
Originally Posted by Seaduction
Attach a "water level" to an underwater thru hull fitting.
A long piece of soft transparent tubing (tygon) temporarily attached to any open through hull with the end carefully held above the waterline would flood to the same height... should work!
1984 Fast/Nicholson 345 "FastForward"
".. there is much you could do at sea with common sense.. and very little you could do without it.."
Capt G E Ericson (from "The Cruel Sea" by Nicholas Monsarrat)