03-10-2018, 03:25 PM
Aircraft still use AM on their frequencies probably because 'doubling' does not obliterate one signal in the presence of another.
Also, the marine band (156MHz - 162MHz in the UK) still use FM.
See http://www.offshoreblue.com/communications/vhf-uk.php
Andy
Also, the marine band (156MHz - 162MHz in the UK) still use FM.
See http://www.offshoreblue.com/communications/vhf-uk.php
Andy







