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The United States System of Aids to Navigation
Information
The system of ATONs used in the United States consists of buoys,
lights, and daybeacons conforming to the IALA region B guidelines as
well as certain variations which are used exclusively in this country.
Figures 4-14 through 4-16 graphically display the variations that exist in
the U.S. system.
Figure 4-14 shows the U.S. ATONs system as seen entering from
seaward.
Figure 4-15 represents a visual buoyage guide for IALA region B.
Figure 4-16 shows how the visual guide would appear on a nautical
chart.
Figure 4-17 shows ATONs as they appear on the western rivers of the
United States.
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