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A boat passes a fixed buoy at 9am. Another boat passes the same buoy at 10 AM heading due north at 5 miles per hour. You will usually see both flags in use. Ace Fixed Mooring Buoy Hardware Kit 18 Inch Buoy Holder.

Rigid Alpha Flag is flown by a vessel engaged in diving operations. This helps the other operator understand your intentions. A mooring is any permanent structure to which a vessel may be secured.

Ocean Data Acquisition Systems buoy means a buoy intended for the collection of data on properties of the ocean. The flashes are rapid. The buoy indicates the presence of danger such as rocks and shoals.

Ace Round Mooring Buoy Hardware Kit Fixed System for 32 - 42 inch Buoys. These cone-shaped buoys are always marked with red markings and even numbers. If in any case the buoy has no light it is spar-shaped.

2 A boat passes a fixed buoy at 9 AM heading due west at 3 mph. On a chart they are normally shown as a star with a flash. When meeting another boat make early and substantial changes to your course.

Some have a light affixed to the top. Aid to Navigation AtoN or Navigational aid NAVAID. Many states have specific distance-away requirements from 100 to 300 feet.