Honeywell KHF 1050 System Installation Manual page 131

7.C. Flight Test
While in flight, establish communications with another HF station. It is important
that the frequencies selected be appropriate for the distance between the aircraft
and the other station (see
). Request a signal and audio quality report, preferably on several different
operating frequencies.
Frequency Band
(MHz)
2.8 & 3.0
3.4
4.4
5.5
6.5
8.8
10.0
11.1
13.3
17.9
21.9
NOTE: The transition between daytime and nighttime distances may occur
gradually over a several hour period. During this transition, communication
distances between the daytime and nighttime distances listed will generally
be realized.
* At times, communication may not be possible on this band during this time frame.
However, during periods of good propagation, worldwide communications may be
realized.
Table 2008 - Typical HF Signal Propagation Distance
Revison 2
N
KHF 1050 SYSTEM INSTALLATION MANUAL
"Table 2008 - Typical HF Signal Propagation Distance"
Daytime Distance
(miles)
up to 100;
often unusable
up to 150;
often unusable
up to 200
up to 300
100 to 600
200 to 800
300 to 1000
400 to 1200
600 to 1500 or greater
700 to 1800 or greater*
900 to 1800 or greater*
for Common Aviation Bands
Nighttime Distance
up to 400
up to 800
up to 1000
100 to 1200
200 to 1500
400 to 1500 or greater
500 to 1800 or greater*
600 to 1800 or greater*
often unusable
often unusable
often unusable
23-10-09
(miles)
Page 2049
Apr/2006