What should NOT be assumed based on radar information?

Assuming the identity of a vessel based solely on radar information is not advisable because radar does not provide specific identifiers or details about the vessels it detects. While radar can show the presence, speed, distance, and course of objects, it does not give direct information about the type, name, or other identifying characteristics of a vessel. This is crucial for safety, as misidentifying a vessel could lead to inadequate responses during navigation or emergency situations. In contrast, radar can provide useful data regarding the speed, distance, and course, which can be measured and interpreted reliably, making it critical for navigation and collision avoidance.