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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]  
STD
2005/06/07
LIGHT_PATTERN FLASHING Rhythmic, in which the total duration of light in a period is clearly shorter than the total duration of darkness and all of the appearances of light are of equal duration; flashing. 12 PR [S57A, Attribute, LITCHR:2]  
STD
2005/06/07
LIGHT_PATTERN FLASHING_LONG_FLASH <<<FLASHING>>> excepting the final appearance of the light, which is longer; flashing/long-flash. 13 IR [S57A, Attribute, LITCHR:14] [FACC, Annex B, CHA:46]
STD
2005/06/07
LIGHT_PATTERN FLASH_ALTERNATING <<<FLASHING>>> but alternating in two or more colours; flash alternating. 11 PR [S57A, Attribute, LITCHR:19]  
STD
2005/06/07
LIGHT_PATTERN GROUP_ALTERNATING <<<GROUP_FLASHING>>> but alternating in two or more colours; group alternating. 14 PR [S57A, Attribute, LITCHR:20]  
STD
2005/06/07
LIGHT_PATTERN GROUP_FLASHING <<<FLASHING>>> and occurring in groups; group-flashing. 15 IR [FACC, Annex B, CHA:9]  
STD
2005/06/07
LIGHT_PATTERN 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 a single short duration light period; group-occulting. 16 IR [FACC, Annex B, CHA:10]  
STD
2005/06/07
LIGHT_PATTERN GROUP_QUICK_FLASH Rhythmic, exhibiting very rapid regular alternations of light and darkness, with a repetition rate of not less than 50 flashes per minute but less than 80 flashes per minute, is interrupted by regularly repeated eclipses of constant and short duration; group quick-flash. 17 IR [FACC, Annex B, CHA:28]  
STD
2005/06/07
LIGHT_PATTERN GROUP_VERY_QUICK Rhythmic, exhibiting very rapid regular alternations of light and darkness, with a repetition rate of not less than 80 flashes per minute but less than 160 flashes per minute, is interrupted by regularly repeated eclipses of constant and short duration; group very quick-flash. 18 IR [FACC, Annex B, CHA:29]  
STD
2005/06/07
LIGHT_PATTERN INTENSIFIED Intensified. 19 IR [FACC, Annex B, CHA:33]  
STD
2005/06/07
LIGHT_PATTERN INTERRUPTED_QUICK_FLASH Rhythmic, in which the sequence of flashes, with a repetition rate of not less than 50 flashes per minute but less than 80 flashes per minute, is interrupted by regularly repeated eclipses of constant and long duration; interrupted quick-flash. 20 PR [S57A, Attribute, LITCHR:9]  
STD
2005/06/07
LIGHT_PATTERN INTERRUPTED_ULTRA_QUICK Rhythmic, in which the ultra quick flashes (160 or more per minute) are interrupted at regular intervals by eclipses of long duration; interrupted ultra quick-flash. 21 PR [S57A, Attribute, LITCHR:11]  
STD
2005/06/07
LIGHT_PATTERN INTERRUPTED_VERY_QUICK Rhythmic, in which the very rapid alterations of light and darkness are interrupted at regular intervals by eclipses of long duration; interrupted very quick-flash. 22 PR [S57A, Attribute, LITCHR:10]  
STD
2005/06/07
LIGHT_PATTERN ISOPHASE Rhythmic, with all durations of light and darkness equal; isophase. 23 PR [S57A, Attribute, LITCHR:7]  
STD
2005/06/07
LIGHT_PATTERN LIGHTED Lighted. 24 IR [FACC, Annex B, CHA:21]  
STD
2005/06/07
LIGHT_PATTERN LONG_FLASHING Rhythmic, in which a single flash of not less than two seconds duration is regularly repeated; long-flashing. 25 PR [S57A, Attribute, LITCHR:3]  
STD
2005/06/07
LIGHT_PATTERN LONG_FLASHING_ALTERNATING <<<LONG_FLASHING>>> but alternating in two or more colours; long-flashing alternating. 26 PR [S57A, Attribute, LITCHR:17]  
STD
2005/06/07
LIGHT_PATTERN MORSE_CODE Rhythmic, in which appearances of light of two clearly different durations are grouped to represent a character or characters in the Morse code. 27 PR [S57A, Attribute, LITCHR:12]  
STD
2005/06/07
LIGHT_PATTERN OCCULTING Rhythmic, 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; occulting. 28 PR [S57A, Attribute, LITCHR:8]  
STD
2005/06/07
LIGHT_PATTERN OCCULTING_ALTERNATING <<<OCCULTING>>> but alternating in two or more colours; occulting alternating. 29 PR [S57A, Attribute, LITCHR:17]  
STD
2005/06/07
LIGHT_PATTERN OCCULTING_FLASH <<<OCCULTING>>>, superimposed on which is a <<<FLASHING>>> light; occulting/flash. 30 IR [S57A, Attribute, LITCHR:15] [FACC, Annex B, CHA:47]
STD
2005/06/07
LIGHT_PATTERN QUICK_FLASH Rhythmic, exhibiting without interruption, very rapid regular alternations of light and darkness with a repetition rate of not less than 50 flashes per minute but less than 80 flashes per minute; quick flash. 31 PR [S57A, Attribute, LITCHR:4]  
STD
2005/06/07
LIGHT_PATTERN QUICK_PLUS_LONG_FLASH Rhythmic, exhibiting without interruption, very rapid regular alternations of light and darkness with a repetition rate of not less than 50 flashes per minute but less than 80 flashes per minute, and all of the appearances of light are of equal duration excepting the final one, which is longer; quick-flash plus long-flash. 32 PR [S57A, Attribute, LITCHR:25]  
STD
2005/06/07
LIGHT_PATTERN THREE_FIXED_HORIZONTAL Three fixed in a horizontal arrangement. 33 PR [S57A, Attribute, LITCHR:24]  
STD
2005/06/07
LIGHT_PATTERN THREE_FIXED_VERTICAL Three fixed in a vertical arrangement. 34 PR [S57A, Attribute, LITCHR:23]  
STD
2005/06/07
LIGHT_PATTERN TWO_FIXED_HORIZONTAL Two fixed in a horizontal arrangement. 35 PR [S57A, Attribute, LITCHR:22]  
STD
2005/06/07
LIGHT_PATTERN TWO_FIXED_VERTICAL Two fixed in a vertical arrangement. 36 PR [S57A, Attribute, LITCHR:21]  
STD
2005/06/07
LIGHT_PATTERN ULTRA_PLUS_LONG_FLASH <<<ULTRA_QUICK_FLASH>>>, and all of the appearances of light are of equal duration excepting the final one, which is longer; ultra quick-flash plus long-flash. 37 PR [S57A, Attribute, LITCHR:27]  
STD
2005/06/07
LIGHT_PATTERN ULTRA_QUICK_FLASH Rhythmic, in which flashes are repeated at a rate of not less than 160 flashes per minute; ultra quick flash. 38 PR [S57A, Attribute, LITCHR:6]  
STD
2005/06/07
LIGHT_PATTERN UNLIGHTED Unlighted. 39 IR [FACC, Annex B, CHA:23]  
STD
2005/06/07
LIGHT_PATTERN VERY_QUICK_FLASH Rhythmic, in which flashes are repeated at a rate of not less than 80 flashes per minute but less than 160 flashes per minute; very quick flash. 40 PR [S57A, Attribute, LITCHR:5]  
STD
2005/06/07
LIGHT_PATTERN VERY_QUICK_PLUS_LONG-
_FLASH
<<<VERY_QUICK_FLASH>>>, and all of the appearances of light are of equal duration excepting the final one, which is longer; very quick-flash plus long-flash. 41 PR [S57A, Attribute, LITCHR:25]  

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