Key:seamark:light:1:character
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 seamark:light:1:character
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| Description |
|---|
Rhythm of light. 
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| 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:
Rhythm of light
Values
| Character (LITCHR) | seamark:light:character | Pattern | Description |
|---|---|---|---|
| Fixed | F | 
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A signal light that shows continuously, in any given direction, with constant luminous intensity and colour. |
| Flashing | Fl | 
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A rhythmic light in which the total duration of light in a period is clearly shorter than the total duration of darkness and all the appearances of light are of equal duration. |
| Long-flashing | LFl | 
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A flashing light in which a single flash of not less than two seconds duration is regularly repeated. |
| Quick-flashing | Q | 
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A light exhibiting without interruption very rapid regular alternations of light and darkness. |
| Very-quick-flashing | VQ | 
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A flashing light in which flashes are repeated at a rate of not less than 80 flashes per minute but less than 160 flashes per minute. |
| Ultra-quick-flashing | UQ | 
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A flashing light in which flashes are repeated at a rate of not less than 160 flashes per minute. |
| Isophased | Iso | 
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A light with all durations of light and darkness equal. |
| Occulting | Oc | 
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A rhythmic light in which the total duration of light in a period is clearly longer than the total duration of darkness and all the eclipses are of equal duration. |
| Interrupted quick-flashing | IQ | 
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A quick light in which the sequence of flashes is interrupted by regularly repeated eclipses of constant and long duration. |
| Interrupted very quick flashing | IVQ | 
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A light in which the very rapid alterations of light and darkness are interrupted at regular intervals by eclipses of long duration. |
| Interrupted ultra quick flashing | IUQ | 
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A light in which the ultra quick flashes (160 or more per minute) are interrupted at regular intervals by eclipses of long duration. |
| Morse | Mo | 
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A rhythmic light in which appearances of light of two clearly different durations are grouped to represent a character or characters in the Morse code. |
| Fixed/flash | FFl | 
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| Flash/long-flash | FlLFl | 
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| Occulting/flash | OcFl | 
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| Fixed/long-flash | FLFl | 
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| Occulting alternating | Al.Oc | 
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| Long-flash alternating | Al.LFl | 
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| Flash alternating | Al.Fl | 
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| Group alternating | Al.Gr | 
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| Quick-flash plus long-flash | Q+LFl | 
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| Very-quick-flash plus long-flash | VQ+LFl | 
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| Ultra-quick-flash plus long-flash | UQ+LFl | 
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| Alternating | Al | 
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| Fixed and alternating flashing | Al.FFl | 
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