PostHeaderIcon Offset Mark

a mark set 6 to 10 boat lengths from a primary mark in the same direction that the primary mark is to be rounded. An offset mark is set between 80 and 90 degrees to the wind direction and must be rounded in the same fashion as the primary mark. Most often used at weather marks, but may be used at leeward marks. For example, an offset mark is used to keep boats in the process of hoisting spinnakers and turning downwind away from those approaching the windward mark on a beat. Known as a hitch mark, spacer mark or spreader mark to British and Commonwealth sailors.

off-set mark

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