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seakeeping
Sign in to savethumb|upright=1.35| refueling in heavy seas Seakeeping ability or seaworthiness is a measure of how well-suited a watercraft is to conditions when underway. A ship or boat which has good seakeeping ability is said to be very seaworthy and is able to operate effectively even in high sea states.
Article
9 sectionsContents
- Measure
- Background
- Factors
- See also
- Related subjects
- References
- Bibliography
- Further reading
- External links
thumb|upright=1.35| refueling in heavy seas Seakeeping ability or seaworthiness is a measure of how well-suited a watercraft is to conditions when underway. A ship or boat which has good seakeeping ability is said to be very seaworthy and is able to operate effectively even in high sea states.
==Measure== In 1976, St. Denis suggested four principal terms needed to describe a seakeeping performance. These are: Mission: what the ship is intended to accomplish. The role of the ship while at sea. Environment: the conditions under which the ship is operating. This can be described as sea state, wind speed, geographic region or some combination thereof. Ship responses: the response of the ship to the environmental conditions. The responses are a function of the environment and the vessel characteristics. Seakeeping performance criteria: the established limits for the ship's responses. These are based on the ship motions and the accelerations experienced, and include comfort criteria such as noise, vibration and sea sickness, performance based values such as involuntary speed reduction, and observable phenomena such as bow immersion.