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ATPL » Air Law – Helicopter » Separation

37.63 Separation

37.63.2 Describe the method of passing traffic information using the clock code.

The specific direction from one aircraft to another is usually expressed using the 12 hour clock method. 

  • For example, if you see an aircraft over your right 'wingtip', it is said to be in the 3 o’clock position from the nose of your aircraft.
  • Each 5 minutes of the hour represents a 30° arc.  Therefore, if you are told that an unidentified aircraft is at your 10 o’clock position, it is (2 x 30) = 60° to the left of the nose of your aircraft, slightly ahead of the left wing.


37.63.4 Describe the situations where Air Traffic Control is responsible for the provision of separation between VFR, SVFR and IFR traffic. AIP ENR



9.1 Separation Provided

9.1.1 Separation is provided by ATC:

  • (a) between IFR flights in Classes A, C, and D airspace; except that separation is not provided during hours of daylight in Class D airspace when flights have been cleared to climb or descend subject to maintaining own separation in VMC;
  • (b) between IFR and VFR flights in class C airspace;
  • (c) between IFR and SVFR flights;
  • (d) between SVFR flights when the flight visibility is reported to be less than 5km; and
  • (e) at controlled aerodromes when defined runway and wake turbulence separations are applicable.
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