![Studying the MF/HF radio stations. Their role in GMDSS, main requirements to installation and survey. GMDSS Radio Survey Blog Studying the MF/HF radio stations. Their role in GMDSS, main requirements to installation and survey. GMDSS Radio Survey Blog](https://gmdsstesters.com/images/radio-survey/mf_hf_radio_station.png)
Studying the MF/HF radio stations. Their role in GMDSS, main requirements to installation and survey. GMDSS Radio Survey Blog
![Studying the MF/HF radio stations. Their role in GMDSS, main requirements to installation and survey. GMDSS Radio Survey Blog Studying the MF/HF radio stations. Their role in GMDSS, main requirements to installation and survey. GMDSS Radio Survey Blog](https://gmdsstesters.com/images/radio-survey/mf_hf_1.jpg)
Studying the MF/HF radio stations. Their role in GMDSS, main requirements to installation and survey. GMDSS Radio Survey Blog
![Amazon.com: Xiegu G90 HF Radio 20W SSB/CW/AM/FM SDR Structure with Built-in Auto Antenna Tuner : Electronics Amazon.com: Xiegu G90 HF Radio 20W SSB/CW/AM/FM SDR Structure with Built-in Auto Antenna Tuner : Electronics](https://m.media-amazon.com/images/I/71-v4elhw1L._AC_UF1000,1000_QL80_.jpg)