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 | 
| Tools for this tag | 
| 
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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.
| seamark:light:1:period=6 | period in sec | 
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