Navigation General · AIS
A danger of relying solely on AIS for collision avoidance is that:
- AAIS shows too many targets
- BAIS measures depth, not position
- CAIS only works at night
- DNot all vessels and no fixed hazards (e.g., unmarked obstructions) transmit AIS, and the data can be wrong or absent✓ Correct
Explanation
Many small craft, naval vessels, and all unlit hazards do not appear on AIS, and transmitted data depends on correct input and a working unit. AIS must be used with radar and visual lookout, never as a sole means of avoiding collision.
Authority: Navigation Rules; AIS limitations
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