Range marker

From International Dictionary of Marine Aids to Navigation
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A visual indication on a radar display for measuring the range or for calibrating the time-base. Note: Range markers may be either fixed or continuously variable.

Reference: B.S. (modified)

Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)

Centre of buoyancy


International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM