Daymark
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Daytime aid to navigation
A daymark is a navigational aid for sailors and pilots, distinctively marked to maximize its visibility in daylight.[1]
The word is also used in a more specific, technical sense to refer to a signboard or daytime identifier that is attached to a day beacon or 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
[edit ]- Trinity House Obelisk, UK
- Kingswear Daymark, UK
- Tasku beacon tower, Finland
- Keskiniemi beacon tower, Finland
- Hiidenniemi beacon tower, Finland
- Laitakari beacon tower, Finland
- Herring Tower, Langness, Isle of Man
- Le Hocq, Jersey
- La Tour Cârrée, Jersey
- Scharhörnbake, Germany
Symbols used on US charts
[edit ]Chart symbols used by the US National 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
[edit ]References
[edit ]- ^ "daymark" . Oxford English Dictionary (Online ed.). Oxford University Press. Retrieved 2021年10月04日. (Subscription or participating institution membership required.)
- ^ a b "Nautical Terms for boating and marine industry terminology". www.marineinstitute.org. Archived from the original on 2003年12月17日. Retrieved 2017年03月08日.
- ^ Light List, Volume II, Atlantic Coast. Washington, DC: US Government Printing Office. 2015. pp. ix.
- ^ 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.
External links
[edit ]- The dictionary definition of daymark at Wiktionary
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