A name beside a moving dot
AIS shares vessel information, but a screen is only as good as the information reaching it.
In 30 seconds
- Identity, position, course and speed help build traffic awareness.
- Missing or incorrect data can create an incomplete picture.
- Compare information with other available observations and approved bridge procedures.
Make it concrete
In a classroom sketch, remove one vessel’s AIS label. The vessel still exists. A missing symbol is not proof of empty water.
- 01Vessel data
- 02AIS message
- 03Traffic picture
Check your understanding
Can an AIS display alone guarantee that every nearby vessel is shown?
- Identity, position, course and speed help build traffic awareness.
- Missing or incorrect data can create an incomplete picture.
- Compare information with other available observations and approved bridge procedures.
Go to the source
Sources reviewed: 13.09.2026