In the coastal marking, there is a mark to indicate that one is in deep or healthy water, that is to say without danger. There are no obstacles around this buoy. These buoys generally define the channel axes or serve as a landing buoy before entering a harbour.
| Colour | Red and white vertical stripes |
| Indicator | A red sphere |
| Fire | (If it exists) or isophase (A) blackout (B) a burst every 10 seconds (C) the letter"A" in Morse code (dash) (D) |
Definitions
Flashing light Light duration is shorter than darkness duration.
Occulting light Light duration is longer than darkness duration.
Isophase light Light duration: The light duration is equal to the darkness duration.
