Seakeeping

Excessive ship motions may hinder the vessel's ability to complete its mission such as the deployment and recovery of small boats or aircraft.A measure of an individual's ability to complete a specific task while on board a moving ship is the motion-induced interruptions[2] (MII).The magnitudes and accelerations of ship motions, (particularly heave, roll and pitch) have adverse effects on passengers and shipboard personnel.Sea sickness will have negative effects on the ability of crew to accomplish tasks and maintain alertness and will obviously distress passengers.Response to given sea conditions by a given hull may vary considerably depending on loading, free-surface of tanks, weight distribution, speed, and direction of travel.
USS Chemung (AO-30) refueling USS Hooper in heavy seas
USS Santa Fe (CL-60) rolling about 35 degrees to starboard as she rides out a typhoon
USS Waldron (DD-699) pitching her forefoot out of the water, while operating in heavy Atlantic seas
USS Chemung (AO-30)USS Hooperwatercraftsea statessea stateship motionssea sicknessdrillshipUSS Santa Fe (CL-60)USS Waldron (DD-699)forefoottransfer functionsresponse amplitude operatorsmotionsheave, roll and pitchDisplacementStabilityFreeboardHuman factorwave spectrumDampingDirectional stabilityHull (watercraft)Seaworthiness (law)Turtling (sailing)AirworthinessCrashworthinessCyberworthinessRailworthinessRoadworthinessSpaceworthinessBrown, David K.