The previous edition of the presentation library 3.4 included the detection of rocks, wrecks and obstructions with the safety contour resulting in an alarm.

Rocks, wrecks and obstruction as per the new presentation library standards, may now result in an indication. Doing this will reduce the number of alarms but still ensures the mariner remains aware of the hazard. BE AWARE!!

Obstructions such as buoys no longer generate an alarm when navigating however it is still a hazard to navigation and will be highlighted as an indication as shown below.