Key:seamark:light:1:period

seamark:light:1:period
Description
The period of light  
Group: Marine navigation
Used on these elements
Useful combination
Status: de facto

Use another number for each sector. If there is only one sector, the number is 1.

For example:

Time of the time occupied by an entire cycle of intervals of light and eclipse.

Example
seamark:light:1:period=6period in sec
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