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From Wikipedia, the free encyclopedia

Scharhörn daymark as an illustration on a 1721 map
Scharhörn daymark as an illustration on a 1721 map

A daymark or a day marker is the daytime identifier (attached signboard) of an aid to navigation (ATON) or day beacon.[1]

Generally, the daymark conveys to the mariner during daylight hours the same significance as does the aid's light or reflector at night.[2]

Daymark chart symbols

[3][further explanation needed]

Paper chart Simplified Simplified symbol name
Square or rectangular daymark - Paper Chart.PNG
Square or rectangular daymark - Simplified chart.PNG
Square or rectangular daymark
Triangular daymark point up - Paper Chart.PNG
Triangular daymark point up - Simplified Chart.PNG
Triangular daymark, point up
Triangular daymark, point down - Paper Chart.PNG
Triangular daymark point down - Simplified Chart.PNG
Triangular daymark, point down
Retro reflector - Paper and Simplified Chart.PNG
Retro reflector - Paper and Simplified Chart.PNG
Retro reflector


In 1864, the Dart Harbour Commissioners erected a daymark at Froward Point near Kingswear in Devon. Often mistaken for a folly it is 80 ft high, octagonal, hollow, tapers gradually from the base to the top, has no roof and no staircase. The base has eight 30ft high pointed arches.[4]

See also


  1. ^ "Nautical Terms for boating and marine industry terminology". Archived from the original on 2003-12-17. Retrieved 2017-03-08.
  2. ^ Light List, Volume II, Atlantic Coast. Washington, DC: US Government Printing Office. 2015. pp. ix.
  3. ^ 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.
  4. ^ Headly, Gwyn (1986). Follies. Johnathan Cape. p. 19. ISBN 9780224027908.

This page was last edited on 17 May 2020, at 06:32
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