It takes a bit of detective work
, time, good lighting
and a knack with making drawings. I have found that the small digital cameras are invaluable for being your "eyeballs".
It is dirty work
at times....a hardhat would be helpful...if you are not used to crawling around a boat
toed shoes would be a plus....if you are lifting up deck
On one tug, I was able to dig up some phone
numbers of former crew members who were happy to help out.