Re: looking for past or present owners of 1970 through 73 cal 27s
Most depth transducers are made by the same company (Airmar) anyway regardless of who 'sold' them with which head. It's usually a simple two wire w/ shield connection, only so many combos.
Don't know about Faria other than having heard of them. I'd look for a used signet head, people are updating this stuff all the time, if it's a 200kHz transducer it will probably 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)