Daymark
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 does the aid's light or reflector at night.[3] Standard signboard shapes are square, triangular and rectangular; and the standard colours are red, green, orange, yellow and black.[2]
Notable daymarks
- Trinity House Obelisk
- Kingswear Daymark
- Tasku beacon tower
- Keskiniemi beacon tower
- Hiidenniemi beacon tower
- Laitakari beacon tower
- Herring Tower, Langness
- Le Hocq
- La Tour Cârrée
- Scharhörnbake
Symbols used on US charts
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
| Types |
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|---|---|---|---|---|---|---|
| Fixtures | ||||||
| Maintenance | ||||||
| Locations | ||||||
| Categories | ||||||
| Global organizations | ||||||
| Authority control databases: National |
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References
- ^ "Daymark". Oxford English Dictionary (Online ed.). Oxford University Press. Retrieved 4 October 2021. (Subscription or participating institution membership required.)
- ^ a b "Nautical Terms for boating and marine industry terminology". www.marineinstitute.org. Archived from the original on 2003-12-17. Retrieved 2017-03-08.
- ^ 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.
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