Lord , mingling eyes are not far away when bird spotter transform themselves into plane spotters.
It's not about being simplex or duplex way of transmitting but nature of content being found from those who are trying to spot a plane by using airnav radar box software's / high power lenses / listening to radio frequencies used by local aerodrome.Being in close proximity of active runway or aerodrome wall is itself illegal.
Secondly , using radio frequency in India without WPC permission is illegal.
