Section 7

When unable to ultilise published SIDs procedures, the operator must:

• Request for Omnidirectional Departure (Chosen, KDR)

• Operator must produce alternate departure procedures (Chosen, KDR)

• Apply to Director General for waiver approval (rubbish)

• Operator has to create a special emergency procedures in the case of engine failure or emergency in flight that occurs after V1

Primary factor for instrument departures:

• Obstacle clearance

• Noise avoidance

What constitutes a straight departure?

• Departure that is extended from the centreline

• Departure that is within 15 degrees from the alignment of the runway

• Departure that is within 30 degrees from the alignment of the runway

• Able to climb to 500ft above aerodrome elevation along heading

For a straight departure, the maximum distance from DER by which track guidance must be acquired is:

• 5km

• 10km

• 15km

• 20km

Omnidirectional Departures are applied when:

• Track Guidance is provided in the design of an Aerodrome

• No Track Guidance (Nav Aid) is provided in the design of an Aerodrome

• no obstacle clearance is provided in the design of an Aerodrome within 25nm

• No track Guidance due to aircraft at front of aerodrome.

What is Omnidirectional Departure?

• Weather must be good, can see the obstacle visually, after passing obstacle then turn

• Visual flight until (3xxft), after that can turn

• Visual flight until (2xxft), after that can turn

• Climb until MSA, after that can turn

RNAV/RNP for departure and arrival differs:

• Rnav 1 for departure and RNP 0.3 for arrival

• Rnp 0.1 for departure and rnav 1 for arrival

• Rnp 0.3 for depart and rnav 3 for arrival

• Essentially the same (KDR)

When is omnidirectional departure suitable/used

• when there is no suitable navigational aid

• where there is no terrain within 25NM

• pilot requests for it and the weather is suitable

• when there are multiple departure routes in the aerodrome

Omnidirectional departure (254)

• departure sectors limited due to obstacle

• departure sector requires a specific minimum climb gradient

• obstacle prevent the development of SID

• no suitable nav aid