NAVIGATION SUPPORT APPARATUS FOR AIRCRAFT, NAVIGATION SUPPORT METHOD, AND NAVIGATION SUPPORT PROGRAM

PROBLEM TO BE SOLVED: To provide a control system of a monitoring question signal in distance measuring equipment or tactical air navigation apparatus in which operation of the apparatus can be continued even in cases of receiving jamming.SOLUTION: A jamming determination control circuit 15B detects a transmission pulse number control voltage output from a transmission pulse number control voltage generation circuit 13A to determine whether or not jamming is being received, and generates a voltage corresponding to a response pulse number output from a response pulse number counting circuit 15A. A signal level of monitoring question signal radiowave generated from a monitoring question signal radiowave generator 15C of a monitoring control device 15 is amplified using the generated voltage during the period of determining the reception of the jamming. Thereby a receiver 13 can detect and process the monitoring question signal radiowave even during receiving the jamming, and the operation can be continued without stopping the distance measuring equipment or tactical air navigation apparatus.