CAP 413, Руководство пользователя

Страница: 50 / 264

CAP 413 Radiotelephony Manual
Chapter 2 Page 16
1.14.6 Items which do not appear in the above list may be acknowledged with an
abbreviated read back.
1.14.7 If an aircraft read back of a clearance or instruction is incorrect, the controller shall
transmit the word 'NEGATIVE' followed by the correct version.
1.14.8 If at any time a pilot receives a clearance or instruction with which he cannot comply,
he should advise the controller using the phrase 'UNABLE' (COMPLY) and give the
reason(s).
1.14.9 When an amendment is made to a clearance the new clearance shall be read in full
to the pilot and shall automatically cancel any previous clearance. Controllers must be
aware, therefore, that if the original clearance included a restriction, e.g. “cross KTN
FL150 or below” then the issue of a revised clearance automatically cancels the
earlier restriction, unless it is reiterated with the revised clearance.
1.14.10 When any doubt exists as to whether a message containing critical information has
been passed by the controller or received and understood by the pilot, the message
must be repeated. Critical information is information, other than that required to
enable routine flight, which must be received by pilots to ensure the safety and
effective operation of their aircraft.
The following can be considered as examples of critical information:
• Low Visibility Procedures
G-ABCD, cleared to cross A1 at
Wicken, maintain FL70 whilst in
controlled airspace. Report entering
the airway
Cleared to cross A1 at Wicken,
maintain FL70 in controlled
airspace, Wilco, G-ABCD
G-CD, hold position
Holding, G-CD
G-CD, contact Ground 118.050
Ground on 118.050, G-CD
BIGJET 347, Squawk 6402
6402, BIGJET 347
G-CD, QNH 1003
QNH 1013, G-CD
G-CD, Negative, QNH 1003
QNH 1003, G-CD
BIGJET 347, Wrayton climb FL280,
cross Wicken FL150 or above
Wrayton, BIGJET 347, unable cross
Wicken FL150 due weight
31 March 2011