ACR&Artex 16__6 Survival Radio - Manual (Page 10)

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3. Always use the ICAO Convention (Convention on International Civil
Aviation) recognized alphabet for spelling.
ICAO recognized alphabet:
A Alpha N November
B Bravo O Oscar
C Charlie P Papa
D Delta Q Quebec
E Echo R Romeo
F Foxtrot S Sierra
G Golf T Tango
H Hotel U Uniform
I India V Victor
J Juliet W Whiskey
K Kilo X X-ray
L Lima Y Yankee
M Mike Z Zulu
EXAMPLE:
“M’AIDER MAYDAY M’AIDER THIS IS MARY JANE
Whiskey X-ray Tango 599 Whiskey X-ray Tango 599 Whiskey X-ray
Tango 599”
To acknowledge that a transmission has been received and understood
in its entirety, simply use the expression “R R R” spoken as “Romeo
Romeo Romeo” (“R” stands for received). Note: some radio operators
use the expression “Roger” instead of “Romeo”.
4. Antenna height and range of communications are intimately related.
In general, a higher antenna will have a longer range than a similar
lower antenna.
The typical range for a transmitting radio held at about 1.2 meters (4.0
ft) above average water level is expected to equal 4.5 kilometers (2.8
statute miles). The receiving shipborne antenna can extend the range if
it is mounted high. Airborne receivers greatly extend the above range
(over 150 kilometers/100 miles for aircraft flying over 1500 meters/5000
ft).
Because of the above fact, and to maximize the range of the survival
craft VHF radiotelephone, the unit should be held as high as possible
without endangering the safety of the operator.