Appearance of Light
An exhibition of light for a given time between two darknesses.
Note 1: In Germany and some other countries, brief appearances of light are classified according to duration
- (a) Blitz - An appearance of light of duration not more than 1 second, the interval of darkness being relatively long in comparison with the appearance of light.
- (b) Blink - An appearance of light of duration at least 2 seconds, the interval of darkness being relatively long in comparison with the appearance of light.
- (c) Schein - An appearance of light between two darknesses, the duration of dark-ness being not longer than the duration of light.
Note 2: Blitz and Blink are flashes (2-5-130).
Please note that this is the term as it stands in the original IALA Dictionary edition (1970-1989)
International Association of Marine Aids to Navigation and Lighthouse Authorities - AISM