CPC Navigation Systems & Radar Operations 3 — Questions and Answers
Question 1: What component of the ILS provides lateral guidance to the runway centerline?
- Glide slope transmitter
- Localizer transmitter (Correct answer)
- Marker beacon system
- Distance Measuring Equipment
Correct answer: Localizer transmitter
The localizer transmitter provides lateral (left/right) guidance aligned with the extended runway centerline.
Question 2: DME slant range distance differs from actual ground distance most significantly when an aircraft is:
- At high altitude and close to the DME station (Correct answer)
- At low altitude and far from the DME station
- Flying perpendicular to the DME radial
- Flying at the same altitude as the DME antenna
Correct answer: At high altitude and close to the DME station
Slant range error is greatest when the aircraft is at high altitude close to the station because the slant angle is steepest.
Question 3: A VOR service volume classification of 'High' (H) provides reliable reception up to what altitude and distance?
- 1,000 ft AGL to 100 NM
- 14,500 ft to 130 NM and 18,000 ft to 100 NM (Correct answer)
- 45,000 ft MSL and 200 NM
- 18,000 ft MSL and 130 NM
Correct answer: 14,500 ft to 130 NM and 18,000 ft to 100 NM
A High VOR is usable from 14,500 ft AGL to 130 NM and from 18,000 to 45,000 ft at 100 NM.
Question 4: What is the standard ILS glide slope angle for instrument approach procedures in the United States?
- 2.5 degrees
- 3.0 degrees (Correct answer)
- 3.5 degrees
- 4.0 degrees
Correct answer: 3.0 degrees
The standard ILS glide slope angle is 3.0 degrees, providing a safe and stable descent path to the runway.
Question 5: During a radar approach, if the controller loses radar contact, the controller must:
- Continue the approach using pilot position reports
- Immediately instruct the pilot to execute a missed approach
- Issue missed approach instructions and advise pilot of loss of radar contact (Correct answer)
- Hand the aircraft off to approach control
Correct answer: Issue missed approach instructions and advise pilot of loss of radar contact
When radar contact is lost during a radar approach, the controller must issue missed approach instructions and inform the pilot that radar contact has been lost.
Question 6: The outer marker of a standard ILS system is typically located at approximately what distance from the runway threshold?
- 0.5 NM
- 1 NM
- 4–7 NM (Correct answer)
- 10–12 NM
Correct answer: 4–7 NM
The outer marker is typically located 4 to 7 NM from the threshold, marking the point where the aircraft should intercept the glide slope.
Question 7: RNAV (GPS) approaches use which navigation specification to ensure required navigation performance?
- RNP AR APCH requires special authorization and a curved path capability
- LNAV only uses barometric altitude and has no lateral accuracy requirement
- LPV approaches use WAAS and provide precision-like lateral and vertical guidance (Correct answer)
- All RNAV approaches require dual GPS receivers
Correct answer: LPV approaches use WAAS and provide precision-like lateral and vertical guidance
LPV (Localizer Performance with Vertical Guidance) uses WAAS augmentation to provide precision-like lateral and vertical guidance down to 200 ft DH.
CPC Navigation Systems & Radar Operations 3
What component of the ILS provides lateral guidance to the runway centerline?