Among the equipment included in the DEEP DRILLER lightweight are the derrick, traveling block in the lowest position, anchors, mooring chain, all machinery with liquids to normal operating level, and __________.
• Lightweight condition definition for MODUs (Mobile Offshore Drilling Units) such as DEEP DRILLER • What is normally permanently on board versus variable load (consumables, stores, cargo) • Which listed items would typically change significantly during normal operations and are therefore NOT part of lightweight
• Which items from the list are consumed or used up during normal operations, and which are more or less constant? • For stability calculations, why is it important that lightweight only includes items whose weight does not normally vary? • Look at each option and ask: is this something that gets added/removed regularly, or is it part of the unit’s fixed, operating condition?
• Be clear on the formal idea of lightweight vs variable load in stability and trim calculations • Identify which of the choices would be considered stores/consumables and so should NOT be in lightweight • Verify which items are normally treated as part of the unit’s fixed equipment or structure rather than changeable payload
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