A pulse of duration less than the period of a recurrent phenomenon, used for scrutinizing a particular epoch of that phenomenon.
Note: In radar, a strobe pulse is sometimes made to follow automatically the echo from a moving object.
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