jotron TRON AIR User Manual

28 98540_UM_ AIR_ D
7 PRACTICAL USE, VHF TRANSMISSION RANGE
The range of VHF communications is limited to ‘line of sight’, because the
VHF radio waves are travelling in straight lines. A higher position of the
transceiver will then increase the coverage. This applies both to the receiving
and transmitting end.
Some figures are indicated in the table below:
1 Nautical mile = 1852 Meters = 1.1508 Miles
1 Statute mile = 1.609 Kilometres
This indicates that with a handheld VHF, used at sea level, the range will be
approx 8 Km (5 Miles). The range will increase if the height above sea level
increases, and also if the other user in the other end is at a higher level.
Receiver – Location 2
Transmitter – Location 1
Height above
sea level
1 m
9 m
30 m
Naut.
mile
Mile
Km
Naut.
mile
Mile
Km
Naut.
mile
Mile
Km
1 m
4.3
5
8
7-8.6
8.1-
9.9
13-16
10.8-
14
12.4-
16.2
20-
26
9 m
7-8.6
8.1-
9.9
13-16
10.8-
14
12.4-
16.2
20-26
24.8-
29
28.5-
33.4
46-
53.7
30 m
10.8-14
12.4-
16.2
20-26
24.8-
29
28.5-
33.4
46-
53.7
47
54
87

jotron TRON AIR Specifications

General

Brand	jotron
Model	TRON AIR
Category	Transceiver
Language	English