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US Buoyage

Preferred-channel marks

Technical visualPreferred-channel marks
Preferred-channel marksTwo red and green horizontally banded preferred-channel marks show that the uppermost color gives the lateral significance for the preferred channel.PREFERRED-CHANNEL MARKS RED ON TOP GREEN TOP
Preferred-channel marksTwo red and green horizontally banded preferred-channel marks show that the uppermost color gives the lateral significance for the preferred channel. 1231PREFERRED-CHANNEL MARKS2RED ON TOP3GREEN TOP

Treat as red for the preferred channel

Treat as green for the preferred channel

Common light characteristic: composite group flashing (2+1), in the uppermost color.

The uppermost color determines the mark's lateral significance for the preferred channel.

These are horizontally banded red and green.

The uppermost color gives the mark its lateral significance for the preferred channel.

Red on top

Treat it as a red mark for the preferred channel.

When proceeding in the conventional direction, keep it to starboard. The preferred branch is therefore on the other side of the mark.

Green on top

Treat it as a green mark for the preferred channel.

Keep it to port in the conventional direction.

Light

A common characteristic is composite group flashing (2+1) in the color of the uppermost band.

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