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Daytime aid to navigation From Wikipedia, the free encyclopedia
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]
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 |