Amateur radio operators aren’t the only ones using HF on a daily basis for reliable, long-distance communications. Airline pilots use HF frequencies from 2800 kHz to 22 MHz as their primary means of communication with shore stations during oceanic flights. These comms can be received by anyone with an HF SSB tuner and provide interesting data points for HF propagation. Aircraft are even sending PSK over HF! Levi C. Maaia presented this tracking demonstration to the Santa Barbara Amateur Radio Club of a flight from Los Angeles (LAX) to Sydney (SYD) and shared resources for tracking and listening in on oceaning flights with or without a radio!
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