Aids to Navigation (ATON)

To safely transit from one place to another we use AIDS TO NAVIGATION (ATONS)…

Objectives

  • Identify the Navigation Systems
  • U.S. Aids to Navigation
  • Uniform State Waterway Marking System
  • Identify the Types of ATONs
  • Learn the application of Regulatory Buoys

Two Types of Aids to Navigation

Buoys and Beacons; Both have various shapes, sounds and light characteristics.

Buoys float and beacons are affixed to land.

Bouys

Nun
Aids to Navigation
Can
Aids to Navigation
Bell
Aids to Navigation
Whistle
Aids to Navigation
Gong
Aids to Navigation
Spar
Aids to Navigation
Lighted buoys
Aids to Navigation
Aids to Navigation
Aids to Navigation
Aids to Navigation

Beacons

Green or red lateral aids show channel edges

International Association of Lighthouse Authorities (IALA) System A and IALA System B regulate navigational markings throughout most of the world

  • System A is generally used in the Eastern Hemisphere
  • System B is generally used in the Western Hemisphere (USA)

In Region B, red aids are on the right

  • RED-RIGHT-RETURNING
Aids to Navigation

US Aids to Navigation (US ATONS)

Navigation aids in this lateral system are determined by their position with respect to the navigable channel, as the channels are entered and followed from seaward toward the head of navigation

Green Aids
Odd Numbered
Red Aids
Even Numbered
Red Right
Returning applies

Aids to Navigation

Regulatory

Information
Aids to Navigation
Controlled
Aids to Navigation
Danger
Aids to Navigation
Exclusion
Aids to Navigation
Aids to Navigation