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These are called preferred channel markers. Which means you can pass on either side, however whatever color the topmost color is is the preferred passing side. Topmost Green prefer to pass on Starboard (right) Topmost Red prefer to past on Port (left). There are sometimes lit, sometimes lettered, never numbered.

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Q: What is alternating red and green bands on a buoy mean?
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Related questions

What does a buoy with red and green bands mean?

Preferred channel markers are buoys showing red and green bands.


What does a White buoy with orange bands and an orange diamond mean?

A white buoy with orange bands and an orange diamond is a hazard buoy. Watch out for shoals, rocks, fallen trees, construction, or other hazards.


What does a buoy number 5 and flashing green light mean?

lp


What does a alternating red and green light mean on the runway mean?

warning- use caution


What does a green can shaped buoy mean?

In Region B a "green can shaped buoy" stands for the edge of a channel on a boaters left side when entering from open sea or heading upstream, the opposite applies in Region A.


What is true about buoy?

A boat should cruise between a green and red buoy. The red buoy will always be located on the right side of your boat. Red buoys will always mean , returning, red, and right. There will be a number on a red buoy that will give the chart location. The numbers will always be even.


What does a green buoy mean?

If it's "red right returning", it's green left returning and green right (starboard) going. That is to say, you pass it to the left (port) as you return to port.


What does a canned shaped buoy mean?

In Region B a "green can shaped buoy" stands for the edge of a channel on a boaters left side when entering from open sea or heading upstream, the opposite applies in Region A.


What does a red buoy mean if you were boating?

Do not pass between the buoy and the shore


What does a diamond on a buoy mean?

Danger.


What does a buoy with a number 5 and flashing green light mean when going upstream?

When going upstream, a buoy with a number 5 and flashing green light indicates the presence of a dam ahead. The dam may be used to generate hydroelectric power or to provide water for irrigation, and can pose a danger to boats and other vessels.


What does yellow buoy mean?

A yellow buoy in the water means caution. They can mean there is danger of pipes, dredge lines or other dangers.