I remember the boat from years ago. Had a very deep hull. That's probably why you term it a "shrimper" - plenty of room for the catch. Recall that one of my professors at the UA College of Architecture built a ferro-cement boat in the early '70's, a Prof. Chadwick. Don't know if it was the same boat. Chad towed his boat to San Diego where it promptly sank straight to the bottom.
Ken Ethridge, AIA
Rincon HS: '66
UA Architecture: '72