Brunei DCA CPL(A) Radio Navigation case studies
Brunei DCA CPL(A) Radio Navigation · Put your knowledge to work in context.
Radio navigation is one of the ground-school subjects a candidate must pass to hold a Commercial Pilot Licence (Aeroplane) issued by Brunei's Department of Civil Aviation. It sits alongside air law, meteorology, navigation, human performance and the technical subjects, and it exists to prove that you understand the systems you will actually fly behind rather than merely the buttons on a panel. The Brunei DCA CPL(A) Radio Navigation case studies are 5 cases and about 2,585 words.
1VOR/DME Fix Degraded by Terrain Shielding
You are cruising at FL150, 62 NM from a VOR/DME station, tracking toward it. The DME readout suddenly jumps from 62 NM to 88 NM and then to dashes, while the HSI bearing pointer swings slowly and settles about 4 degrees off your filed radial.
603 words, about 3 min2ILS Glideslope Warning at Decision Altitude
You are flying a Category I ILS to a runway with a 200 ft decision altitude and 550 m visibility. On short final the localizer is centred, but at about 600 ft AGL the glideslope pointer drops to full-scale fly-up and the warning flag appears.
521 words, about 3 min3GNSS Position Error During RNP Approach
You are flying an RNP AR approach with a 0.3 NM lateral containment requirement. Ten miles from the final approach fix the navigation display shows a position that is 0.4 NM left of the intended track, and the integrity annunciation changes from normal to a degraded status.
502 words, about 3 min4ADF Bearing Drift Over the Sea
At night over the sea, 90 NM from an NDB, the ADF bearing pointer drifts slowly through about 15 degrees and the ident is weak but present. The station is an NDB co-located with a medium-power broadcast transmitter.
470 words, about 2 min5Weather Radar Shadowing in a Line of Cells
You are at FL350 in a twin-jet, 40 NM from a line of convective cells. The weather radar shows a strong red core, but immediately behind it the display is black.
489 words, about 2 min