Were ship's carpenters also surgeons or blacksmiths?

Was a ship's carpenter also a backup surgeon or blacksmith?

Carpenters were repair specialists who could do occasional smithing and needed enough ironworking skill for their work.

A ship's carpenter was not a backup surgeon. Carpenters did sometimes perform smithing and needed enough ironworking knowledge for their own jobs. Their broad technical responsibilities remained part of the maintenance system aboard ship. Medical work belonged to a separate specialization.