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WESTERN RIVERS SYSTEM. THE BASICS 03APR03. Western River System. The Mississippi River and it’s tributaries Western Rivers differ from the U.S. Marking system as follows :

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western rivers system

WESTERN RIVERS SYSTEM

THE BASICS

03APR03

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Western River System

  • The Mississippi River and it’s tributaries
  • Western Rivers differ from the U.S. Marking system as follows:

1. The conventional direction of buoyage is from themouthto head of navigation. Local terminology describes aids as Right or Leftdescending bank

    • 2. Aids are notnumberedorlettered
    • 3. Safe water & Isolated danger marksare not used

2

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Western River System

  • Left Descending Bank Marks:
  • Shape: Triangle
  • Light: Red
  • Color: Red
  • Characteristic:Group- flashing Characteristics

3

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Western River System

  • Right Descending Bank Marks:
  • Shape: Square
  • Light: Green
  • Characteristic:Flashing Characteristics
  • Color: Green

4

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Western River System

  • Crossing Marks:
    • Color: Red or Green
    • Shape: Diamond
    • Light: White(Changed to Red or Green when damaged or worn)
    • Characteristic:
      • Right descending bank - single flash - Green or White
      • Left descending bank - group flashing two - Red or White

5

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Western River System

  • Crossing Marks:
    • By June 1999 solid-colored boards should be changed to Non-lateral Red & Green.
    • Non-lateral means they don’t mark the edges of the channel.

Western River System

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Right descending bank

Left descending bank

Upbound Traffic

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