Leeway is the leeward motion of a vessel due to wind only. It may be expressed as distance, speed, or angular difference between course steered and course through the water. Normally on the Coast Guard exam it is given (as a example) "a northerly wind causes a 3° leeway." Leeway is an error that must be ADDED or SUBTRACTED depending on the kind of question you are asked. (This procedure is very seldom used in real life because its effects are incorporated into the total effects of set and drift.)
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