List

List is a static transverse inclination of a vessel caused by an unequal distribution of mass on the port and starboard sides, resulting in one side being heavier than the other. It is distinct from loll, which results from a ship with negative initial metacentric height (GM) seeking a stable angle, and from rolling in a seaway, which is a dynamic motion. A list reduces the effective range of stability and may be mistaken by passengers and crew for a more serious condition. The chief mate is responsible for managing cargo, ballast, and consumables to keep the vessel upright or within a small acceptable angle of list as defined in the stability booklet. Under IMO stability instruments (the IS Code 2008) and SOLAS II-1, the ship must meet prescribed stability criteria at all stages of loading and discharge. A list in excess of the limit for the vessel's type and condition represents a potentially dangerous situation. Port state control officers check stability information and loading conditions during inspections, and any unexplained list may trigger additional scrutiny. In an emergency, cross-flooding or pumping ballast across the ship are the primary corrective measures.