Environmental Data Coding Specifcation        ISO IEC LogosRight Title Graphic
Home Browse Search Download Submissions FAQs Contact
 

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]  
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:

  • white - the entry is in the standard
  • yellow - the entry has been added to the register
  • pink - the entry has been submitted for inclusion in the register, but it is not approved
  • cyan - a deprecated entry that was originally either in the standard or was added to the register, but has since been deprecated

The following icons are used to identify items that have figures, modifications and/or clarification notes:

  • F n - has Figures and, if more than one figure, n figures
  • M - has Modifications
  • C - has Clarifications

Bottom Bar Graphic
 Send mail to webmaster with questions or comments about this web site.