Example image of eyePlorer eyePlorer map for 'Direction finding': Radio Receiver (radio) Triangulation Antenna (radio) Yagi antenna Loop antenna Wire Dipole Television Ultra high frequency Very high frequency Parabola Goniometer Phased array Signals intelligence ESL Incorporated Helicopter Radio direction finder Doppler effect Beacon Aviation Non-Directional Beacon Signalling (telecommunications) VHF omnidirectional range Aircraft Distress radiobeacon Transmitter Avalanche transceiver Animal Battery (electricity) Wildlife Rocket Missile World War II Civil defense Disaster response Electromagnetic interference Amateur radio direction finding Motor vehicle Transmitter hunting 2008 April 28 Time (magazine) FLR-9 Frequency agility L-Tronics List of acronyms and initialisms: D Luftwaffe radio equipment (Funkgerät) of WW II Phase-Comparison Monopulse Radio fix