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The angle of list is the degree to which a vessel heels (leans or tilts) to either
port A port is a maritime law, maritime facility comprising one or more Wharf, wharves or loading areas, where ships load and discharge Affreightment, cargo and passengers. Although usually situated on a sea coast or estuary, ports can a ...
or
starboard Port and starboard are nautical Seamanship is the art Art is a diverse range of (products of) human activities involving creative imagination to express technical proficiency, beauty, emotional power, or conceptual ideas. There is n ...
at equilibrium—with no external forces acting upon it. Listing is caused by the off-centerline distribution of weight aboard due to uneven loading or to flooding. By contrast,
roll Roll or Rolls may refer to: Movement about the longitudinal axis * Roll (flight), motion about the longitudinal axis of an aircraft ** Roll, an aerobatic maneuver ** Roll program, an aerodynamic maneuver performed in a rocket launch * Roll (ship), ...
is the dynamic movement from side to side caused by
waves The United States Naval Reserve (Women's Reserve), better known as the WAVES (for Women Accepted for Volunteer Emergency Service), was the women's branch of the United States Naval Reserve The United States Navy Reserve (USNR), known as the Un ...
. If a listing ship goes beyond the point where a righting moment will keep it afloat, it will
capsize Capsizing or keeling over occurs when a boat A boat is a watercraft of a large range of types and sizes, but generally smaller than a ship, which is distinguished by its larger size, shape, cargo or passenger capacity, or its ability to carr ...
and potentially sink.


See also

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Angle of loll Angle of loll is the state of a ship that is unstable when upright (i.e. has a negative metacentric height) and therefore takes on an angle of heel to either port or starboard. When a vessel has negative metacentric height (GM) ''i.e.'', is in ...
*
Heeling (sailing) Sailing employs the wind Wind is the flow of gases on a large scale. On the surface of the Earth, wind consists of the bulk movement of air. Winds are commonly classified by their scale (spatial), spatial scale, their speed, the types of fo ...
*
Keeled over Capsizing or keeling over occurs when a boat A boat is a watercraft Watercraft, also known as water vessels or waterborne vessels, are vehicles used in water, including boats, ship A ship is a large watercraft that travels the worl ...
*
Metacentric height The metacentric height (GM) is a measurement of the initial static stability of a floating body. It is calculated as the distance between the centre of gravity of a ship and its metacentre. A larger metacentric height implies greater initial stab ...
*
Ship stability ''Ship stability'' is an area of naval architecture and ship design that deals with how a ship behaves at sea, both in still water and in waves, whether intact or damaged. Stability calculations focus on centers of gravity, centers of buoyancy, t ...

Ship stability
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Ship motions Ship motions are defined by the six degrees of freedom In many scientific fields, the degrees of freedom of a system is the number of parameters of the system that may vary independently. For example, a point in the plane has two degrees of freedo ...


References

{{Ship measurements Engineering concepts Naval architecture Ship measurements