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Figure 9-12.IALA Maritime Buoyage System lateral marks, region A
Buoy Numbering

Signalman 1 & C - Aviation theories and other practices
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Figure 9-13.—IALA Maritime Buoyage System lateral marks, region B. 5. Special marks—call attention to an area or specific feature. Explanation of special marks may be found on the chart or in Sailing Ditrections or Coast Pilots. Distinguishing Marks The meaning of distinguishing marks depends upon one or more of the following features: By day—color, shape, and topmark By night—light color and phase characteristics Buoy Shape There are five basic buoy shapes (fig. 9-14): the can, nun, spherical, pillar, and spar. With the exception of the pillar and the spar buoys, the shape of the buoys indicates the correct side on which to pass. Can buoys Figure 9-14.—Types of buoys. are sometimes referred to as cylindrical buoys and nun buoys are referred to as conical buoys. The term pillar 9-14







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