In the early 60s worked in a yard here in Bermuda
that maintained the Royal navy
pinnaces. 52 ft LOD, plumb stem, deep wine glass transom, double diagonal teak
, nailed and rooves.
Bottoms coppered with 4 ft square sheets
, can't remember the guage, fastened with 1" bronze ring nails on a 6" grid IIRC. Lots of pin punch holes done in place so that the dimpled copper gave a bite into the planking.
I seem to recall
coating some plaking with hot bitumen.
We worked from stern forward, and from deadwood up.
These boats didn't have a sacrificial shoe, which was the reason we got to replace the cladding regularly. ( Royal navy
liberty launches and shoals don't work together
We would form up a "U" shaped piece to cover the underside, and up the sides of the deadwood.
The upper edges of this keel cap were finished into a shallow 'V" shaped rebate cut into a suitable plank 2 or 3 above the garboard.
The sheeting was them worked with various wooden mallets and dollies as we proceeded upward and forward.
I worked under a true craftsmen, retired RN "chippie" who built lightships, and incidentally, was on HMS Amythest, the gunboat in the Yangste River incident.