1. IFR flights departing from controlled aerodromes will receive initial ATC clearance from the local aerodrome control tower. The clearance limit will normally be the aerodrome of destination. Flights departing from non-controlled aerodromes shall join the controlled airspace after receiving an ATC clearance if requested and the flight plan items shall be given by radio to ATC personnel.
2. Detailed instructions with regard to routes, turns, etc. will be part of the clearance.
3. Holding;
Holding area refers to the area within which the aircraft should be contained on better than 98 percent probability. Holding pattern refers to the basic race track pattern. Factors taken into account to calculate the holding area includes:
I ) Ground equipment tolerance;
II) Airborne equipment tolerance;
III) Wind and temperature values within 95 percent probability;
IV) The airspeeds, rates of turn and procedures given below.
4. Turns;
All turns are to be made at a bank angle of 25° or at a rate of 3% per second whichever requires the less bank.
At the holding pattern ETMAP and ESVAV all turns are made to the right.
While turns shall be made to the left at holding patterns GESOL and DUSBA.
5. Timing;
Outbound timing shall be 1 minute up to and including FL140 and 1.5 minutes above FL140.
Outbound timing is to commence from abeam the fix or reporting point or on attaining the outbound heading, whichever is the later.
6. Procedure;
Having reached the fix, turn on to the outbound heading for appropriate period of time. On second arrival over the fix, turn to follow the holding pattern.
7. Minimum Holding Altitude;
The minimum holding altitude at which holding procedures may be performed shall not be less than 1000 ft above all obstacles in that holding pattern’s obstacle assessment.
8. Airspeeds, Rates of Turn and Procedure Table
Flight Level (FL)
|
Propeller Aircraft
|
Jet Aircraft
|
Normal Condition
|
Turbulence Condition
|
Above 6000 ft
up to FL140(4250 m)
inclusive
|
170 kt |
230 kt
(425 km/h)
|
280 kt (520 km/h) or
Mach 0.5 whichever is
less.
The speed of 280 kt
(Mach 0.5) reserved
for turbulence
conditions shall be
used for holding only
after prior clearance
with ATC.
|
Above
FL140 (4250 m)
to
FL200 (6100 m)
|
175 kt |
240 kt
(445 km/h)
|
Above
FL200 (6100 m)
to
FL340 (10350 m)
inclusive
|
265 kt (490 km/h) |
Above
FL340(10350 m)
|
Mach 0.83 |
Mach 0.83 |