Range of VHF transmission

Range of VHF transmission is normally about 7% more than an actual line of sight and can be determined by undermentioned formula:

D = 1.23 sqrt(h in feet)

D= 2.22 sqrt(h in metres)

where D is in nautical miles and h is aircraft station above earth

AIRCRAFT ALTITUDE RANGE (NM) AIRCRAFT ALTITUDE RANGE (NM)
500ft 28 NM 10,000ft 122 NM
1000ft 39 NM 15,000ft 152 NM
1500ft 48 NM 20,000ft 174 NM
2000ft 55 NM 30,000ft 213 NM
3000ft 69 NM 40,000ft 246 NM
5000ft 87 NM

2 Replies to “Range of VHF transmission”

Leave a Reply

Your email address will not be published. Required fields are marked *