CAP 413
Radiotelephony Manual
Chapter 6 Page 30
1.17.8
Deconfliction Service – Descent below ATC Unit Terrain Safe Level
1.17.8.1 If a pilot requests descent below ATC unit terrain safe levels, controllers shall no
longer provide a Deconfliction Service but should instead, subject to surveillance and
RTF coverage, apply a Traffic Service.
1.17.9
Deconfliction Service – Departing and Arriving Aircraft
1.17.9.1 If a controller detects a confliction when an aircraft is below the ATC unit terrain safe
level whilst departing from an aerodrome and climbing to the ATC unit terrain safe
level, traffic information without deconfliction advice shall be passed. However, if the
pilot requests deconfliction advice, or the controller considers that a definite risk of
collision exists, the controller shall immediately offer such advice.
1.17.9.2 If a controller detects a confliction when an aircraft is conducting a pilot interpreted
instrument approach, controllers shall provide avoiding action advice and an
associated terrain safe level to climb to or fly at.
G
-CD, request descent to altitude
1000 feet
G-CD, Traffic Service, taking your
own terrain clearance, descent
approved
Traffic Service, my own terrain
clearance, descent approved, G-CD
G-CD, avoiding action with terrain
alert, turn left immediately heading
180 degrees, traffic 12 o’clock, 5
miles opposite direction, indicating
2000 feet
G-CD, avoiding action, turn left
immediately heading 230 degrees,
climb altitude 2000 feet, traffic 2
o’clock, 2 miles converging
indicating 1000 feet
17 November 2011
Summary of Contents for 413
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