Safe water buoys have red and white vertical stripes. They are spherical: pillar with spherical top mark. They have single red sphere on the top. The light when fitted is white. The Rhythm of the light is isophase, occulting, one long flash every 10 seconds or Morse code "A" Safe water marks - are red and white striped beacon or buoy, often an isophase or occulting white light. It is used to signify that you [are in safe waters. This sea mark implies that open, deep and safe water lies ahead, though it is sometimes used to indicate the start and end of a buoyed section of a continuous narrow channel or a…

NON-LATERAL AIDS TO NAVIGATION are used to mark fairways, mid-channels, and offshore points, and have unobstructed water on all sides. They can also be used by the vessel operator transiting offshore waters to identify the proximity of intended landfall. Lighted/unlighted buoy may show a red topmark.

Lateral Marks These show well-established channels and indicate port (left) and starboard (right) sides of the channels. Port marks are a red can shape. At night, a red flashing light may be shown. Starboard marks are a green conical shape. At night a green flashing light maybe shown. Lateral Aids to Navigation generally indicate which side of an aid to navigation a vessel should pass when channels are entered from seaward. In the absence of a route leading from seaward, the conventional direction of buoyage generally follows a clockwise direction around landmasses