The 30 year old Deerfoot II recently had the thickness of her hull plating surveyed, and we thought the results might be of interest.
The process measures thickness on a grid, which you then compare to other nearby measurements looking for variation.
As you can tell from the attached report, she has aged gracefully. In fact, it would be interesting to compare this three decade old alloy hull to the average production sailboat of the same years built in fiberglass.
Bottom line (pun intended): if you are concerned with a metal hull, integrity is easily checked with non destructive testing.
Thanks to Erik Dolson, who allowed us to reprint the report.