HalcyonDaze
Contributor
According to a book I have on Calypso, they did a large restoration back in the early 80s which lead to the issue of the “Friends of Calypso” wood fragment paperweights to help finance the restoration.
Going through my copy of Jacques Cousteau: The Sea King, the 1981 refit involved replanking the bow (which had been damaged by ice in the St. Lawrence the previous winter), repainting and recaulking the hull, rebuilding the rudders, shafts, and props, and replacing the auxiliary engines. The original main engines wore out in 1985 and were replaced along with the props, shafts, and gearboxes. However, by the time Calypso was sunk in Singapore in 1996 it was in poor shape and the ensuing malpractice hasn't helped matters.