ASTM NCATT Dependent Navigation Systems
(DNS) Endorsement Newest (2025 - 2026
Update) From Real Past Papers Questions – A
Set Of 100 Most Common Exam Frequently
Tested Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1. Which navigation system determines aircraft position using satellites?
A. VOR
B. ADF
C. GPS
D. Marker Beacon
Explanation: GPS uses signals from satellites to calculate precise aircraft
position.
2. What does GPS stand for?
A. General Positioning Service
B. Global Pilot System
C. Ground Positioning Satellite
D. Global Positioning System
Explanation: GPS is the Global Positioning System used for worldwide
navigation.
3. Which navigation aid operates in the VHF frequency band?
A. ADF
B. VOR
, C. GPS
D. Marker Beacon
Explanation: VOR operates in the VHF band between 108.0 and 117.95 MHz.
4. Which navigation system provides slant-range distance to a ground station?
A. ADF
B. VOR
C. DME
D. Marker Beacon
Explanation: DME measures the direct line-of-sight distance between aircraft
and station.
5. Which navigation system uses low- and medium-frequency radio signals?
A. GPS
B. DME
C. ADF
D. VOR
Explanation: ADF receives LF and MF transmissions from NDB stations.
6. Which aircraft system commonly integrates GPS navigation data?
A. Cabin Lighting System
B. Fuel Quantity System
C. Flight Management System (FMS)
D. Fire Detection System
Explanation: The FMS combines GPS information for route management and
navigation.
7. What does DME measure?
A. Ground speed
B. Magnetic heading
C. Slant distance
D. Vertical speed
Explanation: DME calculates the direct distance between aircraft and station.
, 8. Which navigation aid provides magnetic bearing information?
A. DME
B. VOR
C. Marker Beacon
D. Transponder
Explanation: VOR provides azimuth or bearing relative to the station.
9. Which navigation system is considered dependent on external signals?
A. INS
B. GPS
C. Gyroscope
D. Magnetic Compass
Explanation: GPS relies on satellite transmissions.
10.Which antenna is commonly used for GPS reception?
A. Loop antenna
B. Wire antenna
C. Patch antenna
D. Whip antenna
Explanation: GPS receivers typically use patch antennas for satellite signals.
11.What is RAIM primarily used for?
A. Increase transmitter power
B. Improve radar coverage
C. Monitor GPS signal integrity
D. Measure aircraft speed
Explanation: Receiver Autonomous Integrity Monitoring verifies GPS signal
reliability.
12.WAAS primarily improves:
A. Radio communication
B. Engine monitoring
(DNS) Endorsement Newest (2025 - 2026
Update) From Real Past Papers Questions – A
Set Of 100 Most Common Exam Frequently
Tested Questions And Answers In Details 100%
Verified Exam Highly Recommendable For
Grade A+
1. Which navigation system determines aircraft position using satellites?
A. VOR
B. ADF
C. GPS
D. Marker Beacon
Explanation: GPS uses signals from satellites to calculate precise aircraft
position.
2. What does GPS stand for?
A. General Positioning Service
B. Global Pilot System
C. Ground Positioning Satellite
D. Global Positioning System
Explanation: GPS is the Global Positioning System used for worldwide
navigation.
3. Which navigation aid operates in the VHF frequency band?
A. ADF
B. VOR
, C. GPS
D. Marker Beacon
Explanation: VOR operates in the VHF band between 108.0 and 117.95 MHz.
4. Which navigation system provides slant-range distance to a ground station?
A. ADF
B. VOR
C. DME
D. Marker Beacon
Explanation: DME measures the direct line-of-sight distance between aircraft
and station.
5. Which navigation system uses low- and medium-frequency radio signals?
A. GPS
B. DME
C. ADF
D. VOR
Explanation: ADF receives LF and MF transmissions from NDB stations.
6. Which aircraft system commonly integrates GPS navigation data?
A. Cabin Lighting System
B. Fuel Quantity System
C. Flight Management System (FMS)
D. Fire Detection System
Explanation: The FMS combines GPS information for route management and
navigation.
7. What does DME measure?
A. Ground speed
B. Magnetic heading
C. Slant distance
D. Vertical speed
Explanation: DME calculates the direct distance between aircraft and station.
, 8. Which navigation aid provides magnetic bearing information?
A. DME
B. VOR
C. Marker Beacon
D. Transponder
Explanation: VOR provides azimuth or bearing relative to the station.
9. Which navigation system is considered dependent on external signals?
A. INS
B. GPS
C. Gyroscope
D. Magnetic Compass
Explanation: GPS relies on satellite transmissions.
10.Which antenna is commonly used for GPS reception?
A. Loop antenna
B. Wire antenna
C. Patch antenna
D. Whip antenna
Explanation: GPS receivers typically use patch antennas for satellite signals.
11.What is RAIM primarily used for?
A. Increase transmitter power
B. Improve radar coverage
C. Monitor GPS signal integrity
D. Measure aircraft speed
Explanation: Receiver Autonomous Integrity Monitoring verifies GPS signal
reliability.
12.WAAS primarily improves:
A. Radio communication
B. Engine monitoring
