HIRF is divided into three frequency bands, and each can affect airplane electronics in different ways: Low frequency electromagnetic emissions between 10 kHz and 50 MHz — Low frequency HIRF use electrical components like an antenna, inducing currents in the fuselage skin but demonstrating little interior penetration. 3. Hazards of Electromagnetic Radiation to Fuel (HERF): Fuel vapors can be ignited by RF induced arcs during fuel handling operations close to high powered radar and radio transmitting antennas. For example, many ships carry at least one helicopter or have the ability to refuel a helicopter and, therefore, carry fuel to support helo operations.
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