semi-submersible platform
ship type
Odyssey
mobile marine spacecraft launch platform operated by Sea Launch
Deepwater Horizon
former offshore oil drilling rig
Polar Pioneer
scrapped semi-submersible platform
Ocean
semi-submersible
semi-submersible production platform
semi-submersible vessel that serves as an oil production platform
Ocean Viking
semi-submersible platform
Yellow Submarine
semi-submersible vessel built in Argentina
Sea Quest
semi-submersible drilling rig
Amethyst
semi-submersible platform launched in 1987