[Suzuran]

Military aircraft mostly do not have civilian VHF radio, only military UHF radio. They can only communicate with civilian aircraft by using civilian ATC as a go-between, and only if the civilian ATC is equipped with military UHF radio. In the US, this military equipment is standard at civilian ATC sites for this reason.

[hakfoo]

Why don't they have at least a receive-only radio? I can understand if they're averse to someone keying up and accidentally broadcasting Secret Military Stuff on the civilian frequency, but a an air-band capable VHF receiver is less than $100 as a consumer buying single units. Surely the MIC could find a way to add one for just $10k as cheap insurance against losing a $5 million plane in a tragic and avoidable accident?