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Overview of the Western River System: Navigation and Buoyage Basics

This document outlines the fundamentals of the Western River System, focusing on the Mississippi River and its tributaries. It details the key differences in buoyage systems from traditional U.S. navigation. Unique to the Western River System, markings are described using local terminology, with aids designated as Left or Right descending bank, characterized by specific shapes, colors, and lighting patterns. Visible are crucial navigation aids such as triangles, squares, and diamond shapes, ensuring safe passage and awareness of navigation hazards.

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Overview of the Western River System: Navigation and Buoyage Basics

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  1. WESTERN RIVERS SYSTEM THE BASICS 03APR03

  2. 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

  3. Western River System • Left Descending Bank Marks: • Shape: Triangle • Light: Red • Color: Red • Characteristic:Group- flashing Characteristics 3

  4. Western River System • Right Descending Bank Marks: • Shape: Square • Light: Green • Characteristic:Flashing Characteristics • Color: Green 4

  5. 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

  6. 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 6

  7. Right descending bank Left descending bank Upbound Traffic 7

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