What should not be assumed when determining risk of collision based on radar information?

When determining the risk of collision based on radar information, it is crucial not to assume that scanty information is sufficient for safe navigation. Radar provides invaluable information regarding the proximity and movement of other vessels, but it must be complemented with a thorough understanding of the wider navigational context, including visibility conditions, the behavior of other vessels, and potential hazards that may not be reflected on radar screens. Relying solely on minimal radar data can lead to miscalculations and an increased risk of collision, as it does not provide a complete picture of the surrounding maritime environment.

Given that radar data can sometimes be limited or subject to interference, it is essential for mariners to gather as much information as possible and to cross-check radar observations with visual assessments, geographic knowledge, and relevant navigational aids to ensure safe navigation. This comprehensive approach highlights the importance of using radar as one tool among many in the navigation toolbox, rather than relying on scanty or incomplete information as a standalone solution.