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When shall an aircraft in the heavy-wake-turbulence category include the word "Heavy" immediately after its call sign e.g. Fastair 345 heavy?
  • A

    In the initial call to an Air Traffic Service Unit (ATSU).

  • B
    In all calls.
  • C
    It can be avoided because it is visible on the flight plan.
  • D
    In all calls to the aerodrome tower and the approach control unit.

Aircraft in the heavy wake turbulence category shall include the word "HEAVY" immediately after the aircraft call sign in the initial contact between such aircraft and ATS units.

  • So, “Heavy” is used for the first call from the aircraft to a new Air Traffic Unit, to remind them of your wake category importance.
  • For example: "Miami Tower, FastAir 345 Heavy, 8 mile final to land"

ICAO Doc 4444 Wake turbulence categories of aircraft

Wake turbulence separation minima shall be based on a grouping of aircraft types into three categories according to the maximum certificated take-off mass as follows:

a) HEAVY (H) — all aircraft types of 136 000 kg or more;
b) MEDIUM (M) — aircraft types less than 136 000 kg but more than 7000 kg; and
c) LIGHT (L) — aircraft types of 7000 kg or less.

Note: "SUPER" is currently only used for the Airbus A380-800.

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