1. Radio direction finder for gaming chip and/or player tracking

2. Method and system for calibration of a radio direction finder

3. The ship also received a HF/DF radio direction finder at the top of her foremast.

4. Sensors, namely, radar, automatic identication system (AIS), sound direction finder, sonar, radio direction finder, television camera, infrared camera

5. Doppler Radio Direction Finder is a technology that measures the angle between radio transmitter and the radio using Doppler effect (Doppler principle).

6. For more extensive cruising, a radio transceiver, depth finder, radio direction finder and additional rope and wire will be very useful in emergencies.

7. 14 With the development of Doppler Radio Direction Finder technology, it is utilized in many aspects. It is especially important for radio recon and radio detector.