Aids to Navigation (ATON)

Structures or markers (e.g., lighthouses, range lights) guiding boaters through safe channels or hazards; a broader category than just buoys.

The “rules of the road” for waterways, dictating right-of-way, overtaking procedures, and collisi...

Buoys and signs that provide navigation guidance (e.g., regulatory markers, channel markers, haza...

The arrangement of lateral or non-lateral buoys indicating safe channels, hazards, or controlled ...

The skill of interpreting nautical charts, including water depth (soundings), contours, and navig...

Detailed measurements of water depths, bottom contours, and hazards; updates from agencies like N...

Non-governmental markers (e.g., placed by yacht clubs or marinas) that must be approved by the Co...