Almost all military transport and patrol aircraft use VHF.
If you are in a boat the frequency is 156.8 Mhz, also known as channel 16. For an aircraft emergency the VHF frequency is 243.0 Mhz.
Because a VHF broadcast theoretically could reach thousands of people ! Additionally, if it's (for example) a marine or aircraft emergency, there are specific emergency channels, which are monitored 24/7 by professional people.
Generally speaking, VHF or UHF radio. VHF is also used to communicate with ground personnel (heli logging, SAR, firefighting, etc). The 'system' consists of a radio, antenna cable, and external antenna. an intermediate antenna switch can be used to allow multiple radios of the same band to use the same external antenna.
Because a VHF broadcast theoretically could reach thousands of people ! Additionally, if it's (for example) a marine or aircraft emergency, there are specific emergency channels, which are monitored 24/7 by professional people.
You need a VHF radio antenna, a VHF radio receiver and of course a station broadcasting on the VHF frequency.
70
history of vhf radio
VHF
Digital TV signals are transmitted on VHF starting on channel 2 and ending at the top of the UHF spectrum channel 69. At one time the plan was not to use the VHF band but it didn't work out that way.
I wouldn't think so. The uhf coupler is made NOT to pass vhf freqs. The transmitter and the coupler are made to operate in different bands.
You need a VHF/UHF antenna (channels 2 to 60 ). Check out: http://www.fcc.gov/cgb/consumerfacts/digitaltv.html
Spending more on the miltary is called military industrial complex.