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or banking, the position of an aircraft or vessel in which its plane of symmetry is deflected from the vertical to the earth’s surface.
Banking occurs during turns and other aircraft maneuvers. For a vessel, constant (static) heeling occurs with an unbalanced (unsymmetrical, relative to a longitudinal vertical plane) load, ballast intake on one side, or negative initial metacentric height; variable (dynamic) heeling occurs under the effect of variable transverse forces’for example, from waves during the rolling of a vessel, a squall or gust of wind, or transverse jerking of a towline. The heeling angle of a vessel is determined by an inclinometer; the banking (rolling) angle of an aircraft is indicated by an artificial horizon.