Free CPL Navigation and Radio Aids Questions and Answers 1 — Questions and Answers
Question 1: A pilot is tracking inbound to an NDB on a magnetic bearing of 270°. There is a crosswind from the north. To maintain the desired track, the needle on the fixed-card ADF should indicate:
- A relative bearing to the left of 000°.
- A relative bearing of exactly 000°.
- A relative bearing to the right of 000°. (Correct answer)
- A relative bearing of 180°.
Correct answer: A relative bearing to the right of 000°.
To track a specific magnetic bearing to an NDB with a crosswind, the pilot must apply a wind correction angle. With a northerly crosswind while tracking west (270°), the pilot must head slightly north of west (a heading greater than 270°). Since the ADF needle points to the station, and the aircraft's nose is pointed north of the desired track, the needle will point to the right of the 000° relative bearing position on the fixed card.
Question 2: Which of the following is a key distinction between an RNAV and an RNP specification?
- RNP can only be used for en-route navigation, while RNAV is for approaches.
- RNAV systems provide vertical guidance, whereas RNP systems do not.
- RNP requires onboard performance monitoring and alerting, while RNAV does not. (Correct answer)
- RNAV is based on GPS, while RNP is based on VOR/DME inputs.
Correct answer: RNP requires onboard performance monitoring and alerting, while RNAV does not.
Required Navigation Performance (RNP) is a more advanced form of Area Navigation (RNAV). The critical difference is that RNP systems require onboard performance monitoring and alerting. This means the system continuously monitors its accuracy and will alert the pilot if it cannot guarantee that the aircraft's position is within the specified tolerance for that phase of flight.
Question 3: When flying an ILS approach, which component provides the pilot with vertical guidance to maintain the proper descent path?
- The Localizer, which provides lateral guidance.
- The Outer Marker, which indicates the final approach fix.
- The Glideslope, which defines the vertical profile. (Correct answer)
- The Distance Measuring Equipment (DME).
Correct answer: The Glideslope, which defines the vertical profile.
The glideslope is the component of an Instrument Landing System (ILS) that provides vertical guidance. It transmits radio signals that define a specific descent path, typically around 3 degrees, to the runway touchdown zone. The pilot follows the glideslope indication to ensure the aircraft is not too high or too low on the approach.
Question 4: A pilot is flying at 6,000 feet AGL directly over a VOR/DME station. What will the DME indicator read?
- 0.0 NM
- Approximately 1.0 NM (Correct answer)
- 6.0 NM
- The reading will be unreliable.
Correct answer: Approximately 1.0 NM
DME measures 'slant range' distance, which is the direct line-of-sight distance from the aircraft to the ground station. When directly over the station at 6,000 feet AGL (approximately 1 NM), the slant range is equal to the aircraft's altitude. Therefore, the DME will indicate approximately 1.0 NM, not 0.0 NM.
Question 5: You are navigating using a Horizontal Situation Indicator (HSI) tuned to a VOR. The Course Deviation Bar is deflected to the left, and the TO/FROM indicator shows 'TO'. Your selected course is 090°. To intercept the selected course, you must fly a heading:
- Greater than 090°.
- Less than 090°. (Correct answer)
- Exactly 090°.
- Exactly 270°.
Correct answer: Less than 090°.
The HSI provides a pictorial representation of your position relative to the selected course. With the course of 090° selected and a 'TO' indication, the 090 radial is behind you. A left deflection of the course deviation bar means the desired 090° course is to your left. To intercept it, you must turn left to a heading less than 090°.
Question 6: What is the primary purpose of Receiver Autonomous Integrity Monitoring (RAIM) in a non-WAAS IFR-certified GPS receiver?
- To provide vertical guidance for precision approaches.
- To enhance the accuracy of the GPS to within 1 meter.
- To verify the integrity and usability of the received satellite signals. (Correct answer)
- To automatically update the GPS navigation database.
Correct answer: To verify the integrity and usability of the received satellite signals.
RAIM is a function of the GPS receiver that autonomously checks the integrity of the satellite signals. It requires a minimum of five satellites to detect a faulty signal. If a discrepancy is found that could affect navigation accuracy, RAIM will issue an alert to the pilot, indicating that the GPS position information may not be reliable for IFR navigation.
Free CPL Navigation and Radio Aids Questions and Answers 1
A pilot is tracking inbound to an NDB on a magnetic bearing of 270°.
There is a crosswind from the north.
To maintain the desired track, the needle on the fixed-card ADF should indicate: