1. A light exhibiting very rapid regular alternations of light and darkness.
2. More specifically, a quick-flashing light (in sense 1) in which the rapid alternations are repeated without interruption. (Fig. 43a)
Note 1: In most countries, the maximum period of a quick-flashing light is 1 second
Note 2: For quick-flashing lights, there is no restriction on the ratio of durations of light and darkness.
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
Level (technician training - WWA)
Latitude (in degrees)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM