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found that some pilotddrivers confused GO AHEAD with PROCEED.
Additional phrase - PASS YOUR MESSAGEshall have the meaning "Proceed with your message"
Remarks. See GO AHEAD.
RECLEARED not used.
* Recommended Practiee
Remarks. RECLEARED not used on safety grounds. Direction of movement implied in CLIMB and
DESCEND acts as a check in some circumstances when the pilot has received a call that was not directed
at himher.
5.2.1.7.3.2.3 Under certain circumstances the answering ground station may omit its call sign.
Remarks. It has been shown that omitting the ground station call sign may improve safety standards at
busy ATC units.
5.2.1.7.32.6 Air-to-air communications on frequency 123.45 MHz are not permitted.
Remarks. Frequency 123.45 MHz is assigned for discrete ATC purposes within the UK.
5.2.1.9.2.3 This method of acknowledging receipt is not used in the UK.
Remarks. The UK uses procedures in accordance with the examples in ICAO Doc 9432 (1990),
paragraphs 2.8.1.6 and 3.3.2 which are different to those described in this Annex.
5.2.1.9.3 This method of ending conversations is not used in the UK.
Remarks. Standard word OUT is used if necessary although not normally used in VHF communications.
5.2.1.9.4.7 If an aircraft readback of a clearance or instruction is incorrect, the controller shall transmit the word
NEGATIVE followed by the correct version.
Remarks. The phrase I SAY AGAIN is considered superfluous in this case.
5.2.2.1.1.4 Not applicable.
Remarks. Air-to-air communications on the air-to-air communications channel frequency 123.45 MHz
are not permitted in the UK. See 5.2.1.7.3.2.6.
Not applied in the UK.
Remarks. VHF emergency channel frequency 121.5 MHz is not routinely monitored at civil aerodromes,
however, it is monitored 24 hrs at Area Control Centres and covers most of the UK above 3 000' amsl.
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