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US Buoyage

Western Rivers

Technical visualWestern Rivers require local conventions
Western Rivers require local conventionsA coastal lateral buoy with an ordinary number is contrasted with a Western River fixed aid marked with a river-mile number and chart reference.COASTAL & WESTERN RIVERS: DO NOT TRANSFER ASSUMPTIONS 4 MILE248 Use the local chart and Light List.
Western Rivers require local conventionsA coastal lateral buoy with an ordinary number is contrasted with a Western River fixed aid marked with a river-mile number and chart reference. 4 248 1231COASTAL & WESTERN RIVERS: DONOT TRANSFER ASSUMPTIONS2MILE3Use the local chart and LightList.

ordinary coastal lateral aid

Western River fixed aid

Western Rivers use important local conventions. Consult the chart and Light List rather than transferring coastal numbering assumptions.

The Western Rivers system has significant differences.

Among them:

buoys generally are not numbered in the same way as coastal lateral buoys

numbers shown on fixed aids can represent river mileage rather than lateral numbering

safe-water and isolated-danger marks are not used in the same way

river current and channel geometry make local chart and Light List information particularly important

Do not transfer a coastal "red even, green odd" quiz answer blindly to Western Rivers.

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