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EA:  LIGHT_PATTERN

Status: STD 2005/06/07
Code: 576

Concept definition: The type of sequence, grouping, and/or distinctive character of a <LIGHT>; light pattern.
 
Attribute value type: ENUMERATION
Reference type: IR
Reference: [FACC, Annex B: CHA]
Supplemental references:  

Enumerants (presented in a natural order)
Status Attribute label Enumerant label ▾ Concept definition Code Ref type Reference Supplemental references
STD
2005/06/07
LIGHT_PATTERN ALTERNATING Rhythmic showing, in any given <DIRECTION>, two or more colours in a regularly repeated sequence with a regular periodicity, often alternating. 1 IR [S57A, Attribute, LITCHR:28] [FACC, Annex B, CHA:1]
STD
2005/06/07
LIGHT_PATTERN COMPOSITE_GROUP_FLASH <<<GROUP_FLASHING>>>, where all of the groups occur as multiple groups within a period; composite group-flashing. 2 IR [FACC, Annex B, CHA:2]  
STD
2005/06/07
LIGHT_PATTERN COMPOSITE_GROUP_OCCULTING Rhythmic, in which the total duration of light in a period is clearly longer than the total duration of darkness, and the long duration light periods are separated by multiple short duration light periods; composite group-occulting. 3 IR [FACC, Annex B, CHA:3]  
STD
2005/06/07
LIGHT_PATTERN DIRECTIONAL Having a very narrow sector designed to signal or mark a <DIRECTION> to be followed. 4 IR [FACC, Annex B, CHA:36]  
STD
2005/06/07
LIGHT_PATTERN DIRECTIONAL_MOIRE A sodium <LIGHT> gives a yellow background to a screen on which a vertical black <LINE> will be seen by an observer on the <CENTRE_LINE>; directional moiré. This pattern is produced by a short-range (up to 2 kilometres) type of directional <LIGHT>. 5 IR [FACC, Annex B, CHA:43]  
STD
2005/06/07
LIGHT_PATTERN FIXED Shows continuously with a constant luminous intensity and colour in each <DIRECTION>; fixed. 6 PR [S57A, Attribute, LITCHR:1]  
STD
2005/06/07
LIGHT_PATTERN FIXED_ALTERNATING_FLASHING <<<FIXED_FLASHING>>> but alternating in two or more colours; fixed and alternating flashing. 7 IR [FACC, Annex B, CHA:60]  
STD
2005/06/07
LIGHT_PATTERN FIXED_FLASHING Rhythmic with a <<<FIXED>>> light over which is superimposed a <<<FLASHING>>> light; fixed and flashing. 8 PR [S57A, Attribute, LITCHR:13]  
STD
2005/06/07
LIGHT_PATTERN FIXED_GROUP_FLASHING Rhythmic with a <<<FIXED>>> light over which is superimposed a <<<GROUP_FLASHING>>> light; fixed/group-flashing. 9 IR [FACC, Annex B, CHA:7]  
STD
2005/06/07
LIGHT_PATTERN FIXED_LONG_FLASHING <<<FIXED_FLASHING>>>, in which a single flash of not less than two seconds duration is regularly repeated; fixed/long-flashing. 10 IR [S57A, Attribute, LITCHR:16]  

Group membership:

In addition to the status and date information for each entry, a colour coding scheme highlights the database holding to which an entry belongs. The following highlight colours are used:

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  • yellow - the entry has been added to the register
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  • F n - has Figures and, if more than one figure, n figures
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