If there is any doubt as to the proper operation of a radar, which statement is TRUE?

The statement that a radar range compared to the actual range of a known object can be used to check the operation of the radar is true because this method provides a practical verification of the radar's performance. By comparing the radar's indicated range with the known distance to a reliable target, users can assess whether the radar is accurately detecting and measuring distances. This is a standard practice in navigation and radar operation, allowing operators to confirm that the radar system is functioning correctly without requiring specialized knowledge or tools.

This approach is essential for ensuring safety and reliability in navigation, as understanding the accuracy of radar readings is crucial in preventing potential collisions and improving situational awareness. The ability to conduct a straightforward range comparison makes it an effective troubleshooting step when doubts about radar performance arise.