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Daymark

From Wikipedia, the free encyclopedia
Daymark onSt Martin's, Isles of Scilly
Triangular daymark in themarinaofYstad,2021
Scharhörn daymarkin 1898

Adaymarkis anavigational aidforsailorsandpilots,distinctively marked to maximize itsvisibilityindaylight.[1]

The word is also used in a more specific, technical sense to refer to asignboardordaytimeidentifier that is attached to aday beaconor other aid to navigation.[2]In that sense, a daymark conveys to the mariner during daylight hours the same significance as the aid's light or reflector does at night.[3]Standard signboard shapes are square, triangular, and rectangular, while the standard colours are red, green, orange, yellow, and black.[2]

Notable daymarks

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Symbols used on US charts

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Chart symbols used by the USNational Oceanic and Atmospheric Administration Department,2013.[4]

Paper chart Simplified Simplified symbol name
Square or rectangular daymark
Triangular daymark, point up
Triangular daymark, point down
Retro reflector

See also

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References

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  1. ^"daymark".Oxford English Dictionary(Online ed.).Oxford University Press.Retrieved2021-10-04.(Subscription orparticipating institution membershiprequired.)
  2. ^ab"Nautical Terms for boating and marine industry terminology".marineinstitute.org.Archived fromthe originalon 2003-12-17.Retrieved2017-03-08.
  3. ^Light List, Volume II, Atlantic Coast.Washington, DC: US Government Printing Office. 2015. pp. ix.
  4. ^US Chart No. 1: Symbols, Abbreviations and Terms used on Paper and Electronic Navigational Charts.Department of Commerce National Oceanic and Atmospheric Administration Department of Defense National Geospatial-Intelligence Agency. 2013. p. 86.
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  • The dictionary definition ofdaymarkat Wiktionary
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