Daymark
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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
- 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
Chart symbols used by the US National Oceanic and Atmospheric Administration Department, 2013.[4]
| Paper chart | Simplified | Simplified symbol name |
|---|---|---|
| File:Square or rectangular daymark - Paper Chart.PNG | File:Square or rectangular daymark - Simplified chart.PNG | Square or rectangular daymark |
| File:Triangular daymark point up - Paper Chart.PNG | File:Triangular daymark point up - Simplified Chart.PNG | Triangular daymark, point up |
| File:Triangular daymark, point down - Paper Chart.PNG | File:Triangular daymark point down - Simplified Chart.PNG | Triangular daymark, point down |
| File:Retro reflector - Paper and Simplified Chart.PNG | File:Retro reflector - Paper and Simplified Chart.PNG | Retro reflector |
