jack-up barge and semi-submersible drilling rig

anchor anchorage and arabia arabian barge behind boat boats boom bottom bow cargo clouds cloudy crane crude deck derrik draught drilling energy environment fog fourlegs gas handling haze horizon installation jack jackup kingdom leg legs light load maritime mark move ocean of offshore oil operation platform power propeller rig saudi sea seamanship selfpropellered semi semisubmersible sky submersible superstructure supply three threelegs tool towing tug vessel water waters wave