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
