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 line of these marks can be used to mark a safe route through shallow areas. In Sydney Harbour it is used as a ‘centre line of the channel’ and vessels are required to leave it to port when navigating past Bradley’s Head in either direction. Pass this mark to port when traveling up (coming in from sea) or, down stream (going out to sea)