CAP 413
Radiotelephony Manual
Chapter 6 Page 13
1.8
VDF Procedure
1.8.1
This is a procedure whereby a pilot requests a series of QDMs to home to a VDF
station on or near an aerodrome and to carry out a prescribed VDF instrument
approach procedure to the aerodrome. VDF procedures are notified in the AD section
of the UK AIP.
1.8.2
Requests for QDMs are normally initiated by the pilot at intervals of about 1 minute
during the initial stages of the homing, increasing in frequency as the VDF overhead
is approached. During this procedure QDMs are requested as required to achieve and
maintain the specified tracks.
The VDF Procedure is totally pilot interpreted
.
1.8.3
The pilot employs a series of QDMs to home to the VDF overhead positioning himself
to arrive from a direction which will entail the minimum of manoeuvring in the
overhead to proceed outbound on the specified track.
Borton Approach, G-ABCD,
information Delta, request homing
and VDF approach
G-ABCD, Borton Approach, pass
your message
G-ABCD, T67, 15 miles northwest of
Borton, heading 130 degrees, FL55,
IFR, inbound Borton, request
homing and VDF approach, G-ABCD
G-CD, cleared to the VDF overhead
at altitude 3000 feet Borton QNH
1010, QDM 125 class Bravo, report
overhead
Cleared to the VDF overhead at
altitude 3000 feet Borton QNH 1010,
QDM 125 class Bravo, Wilco,
G-CD
G-CD, request QDM G-CD
G-CD, QDM 125
QDM 125, G-CD
G-CD, maintaining 3000 feet,
request QDM G-CD
G-CD, Roger, QDM 135
QDM 135, G-CD
31 March 2011
Summary of Contents for 413
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