mess cooks in whites sure, but blues are awfully expensive work clothes, let alone at sea... but i guess it's possibleI’m not sure. In the (really) old days, before WWII, the Navy was a lot stricter about where and when dungaree working uniforms could be worn. Yes, sailors did sometimes wear an undress version of both whites and blues at sea back then.
mess cooks in whites sure, but blues are awfully expensive work clothes, let alone at sea... but i guess it's possible