CAP 413 Radiotelephony Manual
Chapter 5 Page 7
b) distance from the conflicting traffic;
c) direction of flight of the conflicting traffic; and
d) relative speed of the conflicting traffic or the type of aircraft and level if this is
known.
1.6.2 Relative movement and level should be described by using one of the following terms
as applicable:
a) 'closing, converging, parallel, same direction, opposite direction diverging,
overtaking, crossing left to right, crossing right to left';
b) 'indicating level (if known), unverified or 1000 feet above/below'; or,
c) (when giving traffic information to an aircraft which is climbing or descending)
'
… 1000 feet above/below cleared level.'
1.6.3 The controller will inform the pilot when the conflict no longer exists.
1.6.4 Avoiding action to be taken by the pilot is given when the controller considers that an
imminent risk of collision will exist if action is not taken immediately
or,
G-CD, traffic west, 5 miles, tracking
east, indicating 1000 feet below
cleared level
G-CD, traffic south, 5 miles, tracking
east, indicating similar height
G-CD, traffic 10 o’clock 6 miles
crossing left to right height unknown
fast moving. If not sighted turn left
heading 270 degrees
Left heading 270 degrees, G-CD
G-CD, clear of traffic resume own
navigation direct Walden magnetic
track 350 distance 13 miles
Wilco, G-CD
G-CD, avoiding action, turn left
immediately heading 270 degrees
traffic left 10 o’clock 5 miles crossing
left to right indicating 3000 feet
unverified
Left heading 270 degrees, G-CD
G-CD, avoiding action descend
immediately FL280. Traffic
12 o’clock, 10 miles opposite
direction, same level
Descend immediately FL280, G-CD
17 November 2011
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