Seven
More Navigation Aids: ATON Informational i.e. fuel dock.
Danger Text on these aids is black. Will appear inside or around the shape.
Displays nature of hazard.
Exclusions
Restricted Operation
i.e. swimmers only
i.e. Speed limit or no wake.
Preferred Channel Green on top means preferred channel is to port if heading to open water. Red is secondary.
Preferred Channel Red on top means preferred channel is to starboard if returning from open water. Green is secondary.
Nautical Charts and Navigation Aids Diamond shape indicates the color of the buoy. An open circle at the base means there is no light on the buoy.
This buoy is multi-colored, red over green. It has a red light on it.
In this example, the red circle means this red buoy also displays a red light.
Lighted beacon or lighthouse. Other information regarding a lighthouse may appear on the chart with the symbol.
Cracking the Code! What do those numbers and letters mean?
FL G 4S
This information, found along with a beacon symbol on nautical charts, tells you a lot. In our example at left, the beacon has a flashing (FL) light. It flashes every 4 seconds (4S). The light is green (G). At right, we have a beacon that gives 2 longer flashes followed by 1 short one (2+1). The pattern repeats every 8 seconds. The light is red.
FL (2 + 1 ) R 8S
