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Multiple Choice

Which status is the ship considered to be in when it stops operating its own plant and is receiving services from shore or other ships?

Cold ironing is the practice of a ship in port shutting down its own power plants and drawing electrical power from shore or another vessel. When this happens, the ship’s boilers and generators are off, and all onboard services—lighting, HVAC, pumps, cranes, etc.—run from external power. This status saves fuel, reduces emissions, and quiets the ship in the harbor. While “shore powered” describes the source, the standard maritime term for this condition is cold ironing. The other options don’t fit: being idle would imply the ship’s engines are still generating some power, and being docked simply means the vessel is at a berth, not that it’s off its own power plants.

Cold ironing is the practice of a ship in port shutting down its own power plants and drawing electrical power from shore or another vessel. When this happens, the ship’s boilers and generators are off, and all onboard services—lighting, HVAC, pumps, cranes, etc.—run from external power. This status saves fuel, reduces emissions, and quiets the ship in the harbor. While “shore powered” describes the source, the standard maritime term for this condition is cold ironing. The other options don’t fit: being idle would imply the ship’s engines are still generating some power, and being docked simply means the vessel is at a berth, not that it’s off its own power plants.