LIGHTS AND SHAPES REGULATIONS COLREGS -Easy to understand

#Light and Shapes #COLREG
Day shapes are mast head signals visually indicating the status of a vessel to other vessels on LIGHTS AND SHAPES REGULATIONS COLREGS-navigable waters during daylight hours whether making-way, anchored, or aground. These signals consist of a set of simple geometric shapes-ball, cylinder, cone, and diamond-that are displayed, hung from a mast, in a prescribed manner to indicate a vessel's operational status; some of these signals may be somewhat involved.[1] The meanings of the shapes are defined by the International Regulations for Preventing Collisions at Sea (ColRegs).
Day shapes from ColRegs
Day shapes are black in color and their sizes are determined by the ColRegs; for example, the size of the ball is not less than 0.6 metres (2.0 ft). The vertical distance between shapes is at least 1.5 metres (4.9 ft). Vessels of less than 20 metres (66 ft) length may use shapes of smaller size commensurate with the size of the vessel.[2] Day shapes of standard and reduced sizes are both commercially available. Day shapes are commonly constructed from a light weight frame covered with fabric and are designed to be collapsible for ease of storage.
A US Navy seaman lowers day shapes "ball, diamond, ball", signaling the end of restricted maneuvering
Day shapes are designed to correspond to the various navigation lights required to be shown at night, and are required to be complied with by day from sunrise to sunset. The appropriate lights may also be displayed during the day at times of restricted visibility or other necessary circumstances.[3] Vessels under 7 meters are generally not required to display day shapes even if they are required to display lights at night.[4]
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