Among the equipment included in the DEEP DRILLER lightweight are the loading hoses, derrick, traveling block in the lowest position, anchors, all machinery with liquids to normal operating level, and __________.

Correct Answer: Option B — mooring chain

Mobile offshore drilling unit stability manuals define lightweight under standard shipyard and USCG criteria to include permanently installed equipment, structure, machinery liquids at normal levels, loading hoses, derrick, traveling block, anchors, and specifically the mooring chain.