OM C4 Flashcards
Self contained navigation when..?
Flying over areas where aids and landmarks cannot be used for a distance of 300nm
Flight planning requirements when using GPS as primary Nav sensor- enroute?
Check RAIM
24 Satellites (RNP4)
If loss of GNSS availability occurs, must be able to revert to other means of navigation.
Flight planning requirements for GPS Approach?
Check RAIM
At least one approach procedure not using GPS must be available at an alternate. If not, must be available at destination.
Takeoff and/or enroute alternate must have one approach available not using GPS (except at Majuro and Midway when, at ETA, wx is forecast 1000ft and 3sm, and 2 inertial systems are operating properly)
What cases is GPS required as a primary nav sensor?
Requirement of “GNSS Required” or “GPS Required”
Flying over a DME gap of greater than 14nm RNAV 1/2
Flying over a DME gap of greater than 100nm RNAV 5
RNAV accuracy what percentage of the time?
+/- the RNAV requirement at least 95% of the time
RNP Approach accuracy?
0.3nm on final approach segment, 1nm on all other segments for 95% of the flight time.
Difference between RNP and RNAV?
RNP requires onboard performance monitoring.
Nav sensors RNAV 1/2
DME/DME (not used in Japan for RNAV 1)
DME/DME/IRU
GPS
Nav sensors RNAV 5
VOR/DME
DME/DME
INS or IRS
GPS
Nav sensors RNAV 10 (RNP 10)
INS or IRS
GPS
Nav sensors Basic RNP1, RNP4, RNP Approach
GPS
2 types of GPS approach?
Overlay (not in Japan)
Stand-alone
Self contained Nav procedures:
2 sets of INS at departure time
Cannot pass SCN Decision point without 2 INS
If less than 2 after SCNDP, assess conditions as to whether to continue.
If only 1 operating, use all available means to determine position.
Composition of INS?
1: 1xFMS, 1xIRS
2: 2xFMS, 2xIRS OR;
1xFMS if L and R MCDU are operative, 2xIRS (L+R)
When checking legs and distances, how many degrees is acceptable?
3 or less
RAIM required for unserviceability of RAIM function of how many minutes?
more than 5
RAIM for how long when conducting GPS stand alone approach?
15mins before and after ETA
How many satellites for RAIM and FDE (Fault Detection and Exclusion)
5 for RAIM
6 for FDE
Required on board equipment RNAV 1/2
1x FMS IRS GPS OR
1x FMS IRS DME
Required on board equipment RNAV 5
1x FIVD OR
1x FIG
RNAV 10 Renewed allowable flight time?
DME/DME= 18mins VOR/DME= 30mins
Required onboard equipment RNAV 10?
Unlimited flight time:
1x FMS (both MCDU operative) 2xIRS (L+R) 1x GPS
2xFMS 2xIRS 1xGPS
9hrs 33mins:
As above, without GPS
RNAV Approach onboard equipment
1x FDIGV
1 x Autopilot
RNP required onboard equipment
2x FMS 2xIRS 2xGPS 2xEHSI
RNP Approach 1x Autopilot
