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Key Facts: CPL Navigation Exam

100

Practice Questions

OpenExamPrep

40

Official Questions

CASA

70%

Pass Mark

CASA

2.0 hrs

Time Limit

CASA

The CASA CPL Navigation (CNAV) exam is a 40-question theory test involving flight computer calculations, charts, and radio navigation. It has a 2.0-hour time limit and a 70% passing score. This prep includes 100 practice questions.

Sample CPL Navigation Practice Questions

Try these sample questions to review concepts for the CPL Navigation exam. Each question includes a detailed explanation. Start the interactive quiz above for the full 100+ question experience with AI tutoring.

1On a Lambert Conformal Conic chart, how do parallels of latitude appear?
A.Parallel straight lines with spacing increasing towards the poles.
B.Concentric arcs of circles.
C.Parallel straight lines with constant spacing.
D.Converging straight lines.
Explanation: On a Lambert Conformal Conic projection, parallels of latitude are represented as concentric circles centered on the apex of the cone, while meridians are straight lines converging at the pole.
2Which of the following statements is correct regarding the scale on a Lambert Conformal Conic chart?
A.The scale is exact along the standard parallels.
B.The scale is constant over the entire chart.
C.The scale is exact only at the parallel of origin.
D.The scale decreases continuously as latitude increases.
Explanation: A Lambert Conformal Conic chart uses standard parallels where the cone intersects the Earth's surface. Along these standard parallels, the scale is exact (scale factor of 1.0).
3On a Lambert Conformal Conic chart with standard parallels at 12°S and 36°S, a straight line is drawn between two points. What does this straight line represent?
A.A line that approximates a great circle, curving slightly towards the pole.
B.A rhumb line, which represents a line of constant heading.
C.A perfect great circle path at all latitudes.
D.A line curving towards the equator due to chart convergence.
Explanation: On a Lambert Conformal Conic projection, a straight line represents an approximation of a great circle (the shortest distance). The path curves slightly towards the pole (concave to the parallel of origin).
4How do meridians of longitude appear on a Lambert Conformal Conic chart?
A.Parallel straight lines perpendicular to the equator.
B.Straight lines that converge towards the nearer pole.
C.Curved lines that converge at both the North and South poles.
D.Parabolic curves that are furthest apart at the parallel of origin.
Explanation: Meridians on a Lambert Conformal Conic chart are straight lines that converge at the apex of the cone, which lies beyond the pole. Thus, they converge towards the nearer pole.
5What is the convergence factor (constant of the cone) on a Lambert Conformal Conic chart?
A.The angle of convergence measured at the equator.
B.The ratio of chart convergence to earth convergence, typically equal to the sine of the parallel of origin.
C.The scale factor applied at the standard parallels.
D.The difference in scale between the standard parallels and the parallel of origin.
Explanation: The convergence factor (n) is the constant of the cone. It represents the ratio of chart convergence to longitude difference (earth convergence at the pole), and is equal to the sine of the parallel of origin (sin lat).
6On a standard Mercator chart, how does a rhumb line appear?
A.A curve curving towards the equator.
B.A curve curving towards the nearest pole.
C.A sine wave crossing the equator.
D.A straight line.
Explanation: A standard Mercator projection is conformal and represents rhumb lines (lines of constant heading) as straight lines. This makes it highly useful for marine navigation and simple flight tracking.
7Why does the scale on a Mercator chart increase as latitude increases?
A.To compensate for the curvature of the earth's surface at the poles.
B.Because the parallels of latitude are converging towards the poles.
C.Due to the cone of projection intersecting the earth at high latitudes.
D.To maintain conformality (correct shape) as the meridians are stretched to remain parallel.
Explanation: On a Mercator projection, meridians are represented as parallel straight lines. Since real meridians converge at the poles, this represents a horizontal stretching that increases with latitude. To maintain conformality (correct shapes), the vertical scale (parallels) must be stretched by the same factor (1/cos lat or sec lat).
8A great circle path on a standard Mercator chart is represented by a line that:
A.curves towards the pole (is concave to the equator).
B.is a straight line.
C.curves towards the equator (is concave to the pole).
D.is a straight line only if it runs east-west.
Explanation: On a Mercator projection, a great circle (which is the shortest distance between two points and constantly changes its heading) is represented by a curved line that curves towards the pole (concave to the equator).
9For which type of flying is a Mercator chart projection least suitable?
A.Equatorial navigation between 10°N and 10°S.
B.Polar navigation at latitudes above 70°.
C.Mid-latitude cross-country flights.
D.Rhumb-line tracking over short distances.
Explanation: On a standard Mercator chart, scale distortion becomes infinite at the poles (sec 90° is infinite). Therefore, it is completely unusable for polar navigation (latitudes above 70° or 80°). Polar stereographic projections are used instead.
10If a chart has a scale of 1:1,000,000, what actual ground distance does 1.5 centimeters on the chart represent?
A.1.5 kilometers.
B.15 kilometers.
C.150 kilometers.
D.150 meters.
Explanation: A scale of 1:1,000,000 means 1 cm on the chart represents 1,000,000 cm on the ground. 1,000,000 cm = 10,000 meters = 10 kilometers. Therefore, 1.5 cm represents 1.5 * 10 km = 15 kilometers.

About the CPL Navigation Exam

The CASA CPL Navigation Exam (CNAV) is a mandatory subject for the Commercial Pilot Licence in Australia. It tests a pilot's knowledge of aeronautical charts and projections (Lambert Conformal Conic, Mercator), navigation calculations (heading, track, wind drift, groundspeed, time/distance, fuel calculations, Equal Time Point - ETP, Point of No Return - PNR), radio navigation aids (NDB/ADF, VOR, DME, GNSS), time systems (UTC, LMT, LST, sunrise/sunset), and pre-flight planning and in-flight navigation procedures.

Exam sponsor: CASA / ASPEQ Exam Delivery. The requirements and fees below concern the certification or admission exam, separate from our free practice resources.

Assessment

Closed-book computer-based exam administered at ASPEQ testing centers. Candidates are permitted to use approved reference publications (AIP, ERSA, PCA, WAC charts) and a flight computer (e.g., flight navigation computer, slide rule) and calculator.

Time Limit

2.0 hours

Passing Score

70%

Exam / Certification Fees

Approx. $150 - $250 AUD (varies by provider)

Exam sponsor website

Fees, eligibility, and exam policies can change. Confirm them with the exam sponsor before applying or paying.

Our practice resources: topics covered

We aim to reflect publicly available exam outlines and topic information in our study resources. Coverage, format, and difficulty may differ from the actual exam, and we cannot guarantee that every detail is accurate or current. Confirm exam requirements, fees, and policies with the official exam sponsor.

15%

Charts & Projections

Lambert Conformal, Mercator, chart scale, reading WAC, ERC, and VNC charts

25%

Navigation Calculations

Wind triangle, heading, track, groundspeed, time-distance-speed, fuel burn, ETP, and PNR

20%

Radio Navigation Aids

Principles, errors, and cockpit indications of NDB/ADF, VOR, DME, and GNSS

15%

Time & Earth Geometry

Great circles, rhumb lines, UTC, LMT, longitude time differences, and sunrise/sunset

25%

Flight Planning & Navigation Procedures

Navigation logs, altimeter settings, track corrections, 1-in-60 rule, and visual fixing

Preparing for the CPL Navigation Exam

What You Need to Know

  • Passing score: 70%
  • Assessment: Closed-book computer-based exam administered at ASPEQ testing centers. Candidates are permitted to use approved reference publications (AIP, ERSA, PCA, WAC charts) and a flight computer (e.g., flight navigation computer, slide rule) and calculator.
  • Time limit: 2.0 hours
  • Exam / certification fees: Approx. $150 - $250 AUD (varies by provider) Official sources

Using Our Practice Resources

  • Work through all 100 available questions
  • Review every answer and explanation
  • Track weak areas and revisit them
  • Use our AI tutor for tough concepts

CPL Navigation: Suggested Study Strategy

1Master the 1-in-60 rule: understand how to calculate track error and heading adjustments using the formula: Track Error = (Distance Off / Distance Flown) * 60
2Practice ETP and PNR formulas under wind conditions: ETP = (Total Distance * Groundspeed Home) / (Groundspeed Out + Groundspeed Home); PNR = (Safe Endurance * Groundspeed Home) / (Groundspeed Out + Groundspeed Home)
3Understand VOR and NDB errors: memorize VOR scalloping and ground station errors, and NDB night effect and shoreline refraction errors

Frequently Asked Questions

What is the passing score for the CPL CNAV exam?

The passing score is 70%.

What materials are allowed in the exam?

You can use an approved navigation computer (analog or electronic flight computer), WAC charts, ERSA, PCA, calculator, and drawing tools.