Device for the storing of oil

Device to observe the sea bed from the deck of a vessel

Diagonal hatch system for ships

Dinghy with mast well

Directional control mechanism for a trolling motor

Discovery boat

Distributed machinery structure for ships

Diver flotation apparatus

Diver's buoyant caddy

Dory

Double bottom hull for tank ship

Double hull ship without reinforcing transverse members between

Double hulls

Double hulls

Double sectioned tank

Double shell tank ship

Double wall cargo tank for transporting cryogenics

Double-hull ore carrying vessel conversion from single-hull...

Double-hulled vessel construction having vertical double-walled

Double-layered vessel wall construction with longitudinally stag