Important notice for navigation and officers of the watch

Today more and more navigational decisions are made based on electronic readouts.

Lately, our Lifeboats have become aware that some AIS targets are showing inaccurate information. Track-course, speed, CPA and position can be up to ¾ mile out. In other words, the target is not where it appears to be. Therefore, and following normal professional procedures, no collision avoidance decision must be made based solely on AIS information, but should be verified by radar. This warning is also based on consultation with other commercial vessels and the Coast Guard Victoria Traffic Service.

The worst affected targets appear to be those fitted with Class ‘B’ AIS system.