Flashing more than sixty times a minute.

Related Terms

GROUP QUICK LIGHT

A quick flashing light in which a specified group of flashes is regularly repeated

GROUP FLASHING LIGHT

A flashing light in which the flashes are combined in groups, each group having the same number of flashes, and in which the groups are repeated at regular intervals. The eclipses separating the flashes within each group are of equal duration and this duration is clearly shorter than the duration of the eclipse between two successive groups.

GROUP VERY QUICK LIGHT

A very quick flashing light in which a specified group of flashes is regularly repeated.

INTERRUPTED QUICK FLASHING LIGHT

A quick flashing light (50-80 flashes per minute) is interrupted at regular intervals by eclipses of long duration.

LOG LINE

1. A graduated line used to measure the speed of a vessel through the water or to measure the speed of a current, the line may be called a CURRENT LINE. 2. The line secured to a log. long flashing light. A navigation light with a duration of flash of not less than 2 seconds.

ALTERNATING GROUP FLASHING LIGHT

A group flashing light which shows periodic color change

ALTERNATING

Referring to periodic changes in color of a lighted aid to navigation. Alternating fixed and flashing light. A fixed light varied at regular intervals by a single flash of greater luminous intensity, with color variations in either the fixed light or flash, or both.

BLONDEL-REY EFFECT

The effect that the flashing of a light has on reducing its apparent intensity as compared to the intensity of the same light when operated continuously or fixed

CAUTIONARY CHARACTERISTIC

Of a light, a unique characteristic which can be recognized as imparting a special cautionary significance e.g., a quick flashing characteristic phase indicating a sharp turn in a channel.

COMPOSITE GROUP FLASHING LIGHT

A light similar to a group flashing light except that successive groups in a single period have different numbers of flashes

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