Use the radar in poor visibility conditions, such as fog, rain, or darkness. The radar helps to identify shorelines, fixed obstacles, and other vessels, and to assess their distance and bearing. Effective use of the radar requires that the operator is familiar with the device’s operation and settings in order to interpret observations correctly.

For safety reasons, it is important to remember that the radar is an aid and does not replace visual observations or good seamanship. The radar display should be monitored regularly; however, a continuous lookout must also be maintained.