CAP 413
Radiotelephony Manual
Chapter 10 Page 2
2.4
Communications
Units utilising Automatic Terminal Information Service (ATIS) may accept the
information coded letter, as transmitted by the pilot, as acknowledgement that the
information contained in that code has been received and understood. ATC units
employing ATIS codes are to implement procedures to ensure that information
transmitted on ATIS is correct and cross-checked for accuracy by an ATCO.
2.5
RT Phraseology When Using SSR
In addition to the phraseology shown in Chapter 5, paragraph 1.3.1, Table 2, military
controllers are to use the following RT phraseology when using instructions for the
use of SSR transponders: ... (Callsign) (plus following phrase as appropriate):
NOTE:
Squawk MAYDAY is specified by some nations. See Chapter 5 paragraph
1.3.1 for civil usage. RT Failure and Hijack squawks are to be specified by
code, e.g. squawk 7600 and squawk 7500 respectively.
3
Military Specific Procedures (Control of Aircraft)
3.1
NATO Standard Visual Circuit Procedures
Information on NATO standard visual circuit procedures is contained in STANAG
3297. For the convenience of civil pilots landing at military aerodromes, basic
information on the military visual circuit is also included in Chapter 11 paragraph 1.4.
3.2
NATO Studs and Common VHF Frequencies
3.2.1
Pilots may request the use of NATO studs rather than the discrete frequencies when
making approaches to, or flying in the vicinity of, NATO airfields. The table below lists
the first 5 NATO UHF studs; these are to be displayed at controller positions to enable
stud numbers to be equated to frequencies when requested by aircrew. Two NATO
common VHF channels are also allocated for use by ATC agencies: 122.1 MHz for
Tower and 123.3 MHz for Talkdown.
3.2.2
Designation of NATO Studs
Given the common nature of these NATO UHF and VHF frequencies, pilots and
controllers should listen to the frequency before transmitting in order to avoid
interfering with transmissions from other units or aircraft.
Table 3
CONTROL TO AIRCRAFT
MEANING
Squawk emergency or Squawk 7700
(see Note)
Select 'EMERGENCY'.
Table 4
NATO Stud
Frequency (MHz)
Designation
1
317.5
NATO Common Navigational/Fixer/Guard
2
257.8
Common Tower
3
385.4
Common GCA/Talkdown/Final Control
4
344.0
Common GCA/Marshall/Search
5
362.3
Common Approach Control
Guard
243.0
Common Emergency Frequency
31 March 2011
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