OMA Chapter 8

Question 1

What are the main things covered in OMA chapter 8?

Answer 1

Operating procedures

All to do with usability of aerodromes, operating minima, fuel policy, load sheets, tech log, ground handling instructions, flight procedures, all weather operations, ETOPS, non-commercial flights, oxygen requirements, EFB applications, punctuality policy

Question 2

What does MSA stand for? How much obstacle clearance does it guarantee?

Answer 2

Minimum Sector Altitude

1000ft

Question 3

What does TAA stand for? What is it?

Answer 3

Terminal Arrival Altitude

In RNAV approach, MSA may be replaced by TAA, which is based on one of the procedure fixes

Question 4

What does MORA stand for?

Answer 4

Minimum off-route altitude

Question 5

What are the extents of MORA obstacle clearance, both vertically and laterally?

Answer 5

1000ft clearance on terrain up to 5000ft
2000ft clearance on terrain above 5000ft
within 20nm of the route centreline

Note that the minimum MORA depicted on flight plans is 2000ft

Question 6

What is MGA?

Answer 6

Minimum grid altitude

Round up to next 100ft, then increase by 1000ft below 6000ft,

or 2000ft above 6000ft

Question 7

What is significant when the surface temperature is -10C or less?

Answer 7

Low altitude temperature corrections need to be made

Question 8

Are low temperature corrections made to DA and MDA?

Answer 8

Yes

Question 9

Which altitudes are corrected for cold temperatures?

Answer 9

Any altitudes relevant after the final approach fix on NPAs

Question 10

What must you ensure after completing temperature corrections?

Answer 10

ATC are informed, as this helps vertical separation

Question 11

Where should you consult in the manuals to ensure a vertical guidance mode can be used with temperature corrections, and what corrections to make?

Answer 11

OMA Chapter 8.1

Question 12

Where is aerodrome elevation taken from?

Answer 12

The highest point of the landing area

Question 13

When is an MDA/H used and when is a DA/H used?

Answer 13

MDA/H for 2d instrument approach
DA/H for 3d instrument approach

Question 14

What does MDA/H stand for?

Answer 14

Minimum Descent Altitude/Height

Question 15

What does DA/H stand for?

Answer 15

Decision Altitude/Height

Question 16

What is the relevance of the alert height?

Answer 16

If a failure of one of the required redundant operational systems occurred below the alert height, it would be ignored and the approach continued. If the failure occurred above, the approach would be discontinued and a go around executed, unless reversion to a higher decision height is possible

Question 17

What is a CAT I Approach? What are the associated minima?

Answer 17

Precision instrument approach and landing with a decision height not lower than 200ft and an RVR not less than 550m

Question 18

What is a CAT II Approach? What are the associated minima?

Answer 18

Precision instrument approach and landing with a decision height lower than 200ft but not lower than 100ft, and an RVR not less than 300m

Question 19

What is a CAT IIIA Approach? What are the associated minima?

Answer 19

Precision instrument approach and landing with a decision height lower than 100ft and an RVR not less than 200m

Question 20

What is a CAT IIIB Approach? What are the associated minima?

Answer 20

Precision instrument approach and landing with a decision height lower than 100ft, or NO DH, and an RVR lower than 200m but not less than 75m

Question 21

What is the definition of ceiling?

Answer 21

Height above ground or water of the base of the lowest cloud layer below 20000ft covering more than half the sky

Question 22

What is the definition of cloud base?

Answer 22

The height of the base of the lowest observed or forecast cloud element in the vicinity of the aerodrome

Question 23

What is the minimum amount a runway needs to be covered in order to be classed as contaminated?

Answer 23

More than 25% of one third of the runway surface area

Question 24

What is the definition of deadheading?

Answer 24

Time spent in transportation on aircraft at the insistence of the AOC holder to or from a crew member’s home station

Question 25

When considering MDA/H and DA/H, when do you use RA and when do you use baro?

Answer 25

RA for height, baro for altitude

Question 26

When does final approach start and finish?

Answer 26

FAF (or end of last procedure turn if no FAF specified) Finshes at DA

Question 27

What is final reserve fuel?

Answer 27

The amount of fuel required to fly for 30 minutes in standard conditions at holding speed1500ft above the aerodrome elevation, calculated at the estimated weight on arrival at the alternate (or destination, when no alternate is required)

Question 28

What is the purpose of a fuel ERA aerodrome?

Answer 28

Reduces the required contingency fuel

Question 29

What is the basic distinction between jamming and spoofing?

Answer 29

Jamming prevents GNSS signals, whereas spoofing is broadcasting fake signals to create incorrect data

Question 30

What is MDA referenced to? What is MDH referenced to?

Answer 30

Mean sea level Aerodrome elevation, or threshold elevation if that is more than 7ft below aerodrome elevation

Question 31

What is the definition of missed approach point?

Answer 31

That point in an instrument approach procedure at or before which the prescribed missed approach procedure must be initiated in order to ensure that the minimum obstacle clearance is not infringed

Question 32

When is 'night'?

Answer 32

The hours between the end of evening civil twilight and the beginning of morning civil twilight (or such other period between sunset and sunrise) Civil twilight ends in the evening when the centre of the sun's disc is 6 degrees below the horizon and begins when the centre of the sun's disc is 6 degrees below the horizon

Question 33

What does RNP stand for?

Answer 33

Required Navigation Performance

Question 34

What is a steep approach?

Answer 34

4.5 degree glide or more All approaches exceeding 4.5 degrees require specific operator approval

Question 35

What is the TODA?

Answer 35

Take off run available, plus length of clearway available