Those are floating tenons with pegs so, pegged floating tenon?
I don't know if they would have been drawbored, if so, probably the bottom of each tenon was pegged and the top holes on the tenon would have been offset slightly so when the peg is driven it pulls the boards tighter together. - Drawbore floating tenon?
Since it was on a boat/ship, there was probably a name for that type construction, but I don't know what it was.
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Last edited by trc65; 04-11-2014 at 02:30 AM.