Lateral marks

Lateral marks:
As stated, lateral marks indicate the port and starboard boundaries of a route to be followed e.g. channel.
Lateral marks differ between buoyage system A and buoyage system B.
Lateral marks are usually positioned to indicate port and starboard boundaries in well-established channels.
When entering a port, the green mark (the starboard hand buoy) should be seen on your vessel’s starboard side, and the red mark (the port hand buoy) should be seen on your vessel’s port side.
When you are departing the port, the green mark should be seen on your vessel’s port side, and the red mark should be seen on your vessel’s starboard side.
The port hand mark has the shape of a can or a spar, and is colored red with a single red can as a top mark (if there is any).
By night a port hand mark shows a flashing red light.
The starboard hand mark has the shape of a cone or a spar, and is colored green, with a single green cone point upwards as a top mark (if there is any).
By night a starboard hand mark shows a flashing green light.