![radio communications - How do aircraft making HF transmissions avoid stepping on other HF users? - Aviation Stack Exchange radio communications - How do aircraft making HF transmissions avoid stepping on other HF users? - Aviation Stack Exchange](https://i.stack.imgur.com/ENM9C.png)
radio communications - How do aircraft making HF transmissions avoid stepping on other HF users? - Aviation Stack Exchange
![HF Radio and Antennas in Mooney Aircraft - Avionics/Panel Discussion - Mooneyspace.com - A community for Mooney aircraft owners and enthusiasts HF Radio and Antennas in Mooney Aircraft - Avionics/Panel Discussion - Mooneyspace.com - A community for Mooney aircraft owners and enthusiasts](https://mooneyspace.com/uploads/monthly_2017_03/N916BL_Mooney_HF_Belly_Antenna_Brian_Lloyd_1024.jpg.611e81c9b04ca5e167b1649246bf025a.jpg)
HF Radio and Antennas in Mooney Aircraft - Avionics/Panel Discussion - Mooneyspace.com - A community for Mooney aircraft owners and enthusiasts
787 Guide - There are no EICAS messages for a failed HF radio, but you may see these dashed lines. From experience I've also had HF radios fail without any particular indication.
![HF radio becomes low-cost alternative to satellite | High-frequency radio - Urgent Communications article HF radio becomes low-cost alternative to satellite | High-frequency radio - Urgent Communications article](https://urgentcomm.com/files/2011/03/hf-radio-propagation-201103-4.jpg)