Instruments TD 75

Question 1

What is the difference between an OROCA and a MOCA?

Answer 1

OROCA - is off route obstacle clearance altitude that provides obstruction clearance within a lat/long quadrant. Provides clearance of 1000’ in non-mountainous areas and 2000’ clearance in mountainous areas. May not provide signal coverage between NAVAIDS.

MOCA - is the minimum obstacle clearance altitude, which provides the lowest published altitude between two radio fixes which meet obstacle clearance requirements for the route segment and assures acceptable navigational coverage within 25 statute miles/22 nautical miles of the VOR.

Question 2

What does the MEA provide?

Answer 2

Minimum EN Route Altitude, it is the lowest published altitude between two radio fixes which assures acceptable navigational signal and coverage which meet obstacle clearance between fixes.

Question 3

While flying IMC, what is the emergency procedure for #1 GEN FAIL and #2 GEN FAIL?

Answer 3

LAND AS SOON AS POSSIBLE
- APU: Start
- APU GEN SWITCH: ON
If unable to land
- A/S: Below 100 KCAS or VNE whichever is slower
- Altitude: Below 6,000 feet PA
- AFCS Switch: OFF
- PDPs: Check circuit breakers and place gang bars down
- Each GEN switch: OFF/Reset, then ON

Question 4

As an Army Aviator flying a CH-47F, what are your altitude requirements for using oxygen?

Answer 4

Oxygen shall be used when:
10,000 feet PA - More than an hour
12,000 feet PA - More than 30 minutes
14,000 feet PA and above - for any period of time