OMA Section 8 Planning Flashcards
When can you dispatch with no destination alternate? (OMA 8.1)
At least one usable destination alternate aerodrome must be selected for each IFR flight unless:
Either
Dispatched under the Alternative Flight Planning Procedures in Section 8.1.7.6.5, “No Destination Alternate Aerodrome Procedure”; and
The duration of the planned flight from take-off to landing, or, in the event of in-flight re-planning, the remaining flying time to destination does not exceed six hours; and
Two separate runways are available and usable at the destination and the appropriate weather reports or forecasts for the destination aerodrome, or any combination thereof, indicate that for the period from one hour before until one hour after the expected time of arrival (ETA) at the destination, the ceiling will be at least 2,000 ft or circling height +500 ft, whichever is greater, and the visibility will be at least 5 km.
Note:
Runways on the same aerodrome are considered to be separate runways when.
They are separate landing surfaces which may overlay or cross such that if one of the runways is blocked, it will not prevent the planned type of operations on the other runway.
Each runway shall have a separate approach procedure based on a separate navigation aid.
Or
The destination aerodrome is isolated.
Two suitable destination alternates must be selected when:
The appropriate weather forecasts for the destination indicate that from one hour before to one hour after the aircraft’s ETA the weather conditions will be below the applicable planning minima;
or
No meteorological information for the destination is available.
When are 2 Destination Alternates required? (OMA 8.1)
Weather reports or forecasts for the destination shall be at or above the applicable minima for the expected instrument approach, except that two destination alternates are required when:
The weather reports or forecasts at destination are below the applicable planning minima. The applicable planning minima shall take into consideration any NOTAM, MEL item(s) or Crew qualification having an impact on operating minima.
No meteorological information is available.
The landing performance requirements cannot be assured at a destination aerodrome due to dependence on a specific wind component or runway state.
When do you need a takeoff alternate? (OMA 8.1)
A take-off alternate is required when performance or meteorological conditions preclude a return to the departure aerodrome.
Meteorological conditions are suitable for return to the departure aerodrome when they are at or above the applicable minima for the instrument approach in use.
The weather reports or forecasts for the take-off alternate shall be at or above the applicable minima for the expected instrument approach.
Any limitation related to one engine inoperative operation or dispatch under MEL conditions shall be taken into account.
An aerodrome selected as a take-off alternate shall be located within one hour still air flight time at the one engine inoperative cruising speed (maximum continuous thrust speed) in ISA conditions based on the actual take-off weight. The maximum distance allowed for this purpose is stated in the OMB for the aeroplane type; this assumes maximum take-off weight.
What is a Type A Instrument Approach Operation? (OMA Definitions)
An instrument approach operation with an MDH or a DH at or above 250 ft.
What is a Type B Instrument Approach Operation? (OMA Definitions)
An operation with a DH below 250 ft. Type B instrument approach operations are categorised as:
- Category I (CAT I): a DH not lower than 200 ft and with either a visibility not less than 800 m or an RVR not less than 550 m;
- Category II (CAT II): a DH lower than 200 ft but not lower than 100 ft, and an RVR not less than 300 m;
- Category III (CAT III): a DH lower than 100 ft or no DH, and an RVR less than 300 m or no RVR limitation.
What is a Non-precision Approach and APV ? (OMA 8.4)
A Non-precision Approach (NPA) or APV operation is an instrument approach with a MDH not lower than 250 ft and an RVR/CMV of not less than 750 m.
The following are non-precision approaches:
ILS Localiser only (LOC).
SRA.
RNP (LNAV).
VOR.
NDB.
LDA.
Approach procedure with vertical guidance (APV) means a performance-based navigation (PBN) IAP designed for 3D instrument approach operations Type A;
The following are APV approaches:
RNP (LNAV/VNAV).
RNP AR.
These approaches shall be conducted as CDFA and flown to a Decision Altitude (DA).
The decision to go-around or continue the approach to landing must be made no later than DA.
The exception is circling approach where descent is to be made to MDA.
What is a precision approach? (OMA Definitions)
Precision approach (PA) procedure means an IAP based on navigation systems designed for 3D instrument approach operations Type A or B.
