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PPL Navigation & Communication Theory study materials
PPL Navigation & Communication Theory study resources

PPL Navigation & Communication Theory practice questions

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Question 1Basic Navigation Principles and the Earth

On a Mercator chart used for PPL navigation, what happens to the scale as latitude increases toward the poles?

  1. The scale decreases, so a given distance appears smaller than at the equator
  2. The scale increases, so a given distance appears larger than at the equator Correct answer.
  3. The scale increases only along the meridians but stays constant along the parallels
  4. The scale stays constant at every latitude, which is why it is used for navigation

Explanation

The Mercator projection stretches the spacing between parallels increasingly toward the poles so that the rhumb line plots as a straight line. This means the chart scale grows with latitude, and a distance measured near the poles looks larger than the same distance near the equator. A PPL candidate must therefore measure distance only against the latitude scale at the same latitude as the leg being flown.

Question 2Basic Navigation Principles and the Earth

A position is given as 45 degrees 30 minutes North. How is this latitude expressed in decimal degrees?

  1. 45.75 degrees
  2. 45.50 degrees Correct answer.
  3. 45.05 degrees
  4. 45.30 degrees

Explanation

Minutes of arc are converted to decimal degrees by dividing by 60, because one degree contains 60 minutes. Here 30 divided by 60 equals 0.5, giving 45.50 degrees North. Writing 45.30 would treat minutes as hundredths of a degree, which is a common plotting error.

Question 3Basic Navigation Principles and the Earth

Which statement correctly describes a great circle on the Earth's surface?

  1. It is any line of constant bearing drawn on a chart
  2. It is the shortest route between two points only when both lie on the equator
  3. It is a circle centred on a pole, such as a parallel of latitude
  4. It is any circle whose plane passes through the Earth's centre Correct answer.

Explanation

A great circle is formed where a plane through the centre of the Earth intersects its surface, giving the largest circle possible on the sphere. The shortest surface distance between two points always lies along the great circle joining them. Rhumb lines and parallels do not generally satisfy this definition.

Question 4Basic Navigation Principles and the Earth

What is the standard reference for measuring latitude on the Earth?

  1. The plane of the ecliptic
  2. The plane of the equator Correct answer.
  3. The magnetic equator
  4. The prime meridian through Greenwich

Explanation

Latitude is the angular distance of a point north or south of the equator, measured from the plane of the equator to the radius through the point. It ranges from 0 degrees at the equator to 90 degrees at the poles. The prime meridian is the reference for longitude, not latitude.

Question 5Basic Navigation Principles and the Earth

A pilot flies from 60 degrees North to 60 degrees South along the same meridian. Approximately what distance is covered?

  1. About 10,800 nautical miles
  2. About 5,400 nautical miles
  3. About 7,200 nautical miles Correct answer.
  4. About 3,600 nautical miles

Explanation

The journey spans 120 degrees of latitude, from 60 North through the equator to 60 South. One minute of latitude equals one nautical mile, so 120 degrees multiplied by 60 gives 7,200 nautical miles. Distance along a meridian is read directly from the latitude scale.

Question 6Basic Navigation Principles and the Earth

Which statement about a rhumb line is correct?

  1. It cuts every meridian at the same angle and plots as a straight line on a Mercator chart Correct answer.
  2. It is always the shortest path between two points on the Earth's surface
  3. It plots as a curved line on a Mercator chart and as a straight line on a globe
  4. It can only be flown along the equator or along a meridian

Explanation

A rhumb line, or loxodrome, maintains a constant track angle relative to all meridians, which makes it convenient for steady-heading flight. Because the Mercator projection is constructed to preserve this property, the rhumb line appears as a straight line on that chart. It is longer than the great circle except on the equator or a meridian.

Question 7Basic Navigation Principles and the Earth

A great-circle route between two mid-latitude points is compared with the rhumb line between the same points. Which difference is expected?

  1. The two routes are identical in length and shape at all latitudes
  2. The great circle is longer but easier to fly with a constant heading
  3. The rhumb line is shorter because it follows the parallel of latitude
  4. The great circle is shorter and its track angle changes continuously along the route Correct answer.

Explanation

The great circle is the shortest surface distance, but its track crosses each meridian at a different angle, so the heading must be continually adjusted. The rhumb line is longer yet keeps a constant track, which is why it is often used for short legs. The difference in length grows with increasing latitude and separation between the points.

Question 8Basic Navigation Principles and the Earth

How is longitude of a point defined?

  1. The angular distance measured along the parallel from the anti-meridian
  2. The angular distance measured from the nearest pole to the point
  3. The angular distance measured from the equator to the point along its meridian
  4. The angular distance measured along the equator from the prime meridian to the meridian of the point Correct answer.

Explanation

Longitude is the angle at the Earth's centre between the prime meridian and the meridian through the point, measured along the equator from 0 to 180 degrees east or west. It fixes the east-west position of a place. Latitude, by contrast, is measured north or south of the equator.

Question 9Basic Navigation Principles and the Earth

Why does a Lambert conformal conic chart show a straight line that closely approximates a great circle?

  1. Because the projection is centred on the equator and ignores latitude
  2. Because meridians converge to a single point at the South Pole on the chart
  3. Because the cone touches the Earth along standard parallels and the projection preserves angles Correct answer.
  4. Because the chart uses a constant scale at every latitude

Explanation

On a Lambert conformal conic, a straight line drawn between two points approximates the great circle, which simplifies flight planning on such charts. The projection is conformal, preserving angles, and is constructed on a cone intersecting the Earth at standard parallels. Meridians appear as straight lines converging toward the pole.

Question 10Basic Navigation Principles and the Earth

What is meant by the term 'convergency' in navigation?

  1. The rate at which the magnetic variation changes along a route
  2. The difference between indicated and true airspeed
  3. The angle between true north and magnetic north at a given place
  4. The angle between the meridians at two positions, equal to the change in longitude times the sine of the mean latitude Correct answer.

Explanation

Convergency describes how meridians draw together toward the poles, and it equals the change of longitude multiplied by the sine of the latitude. It is used when converting between great-circle and rhumb-line tracks and when applying grid navigation. It has nothing to do with magnetic variation or airspeed.

Question 11Basic Navigation Principles and the Earth

The Earth is often approximated as an oblate spheroid rather than a perfect sphere. What is the practical consequence for navigation?

  1. The equator lies closer to the centre of the Earth than the poles do
  2. The length of a degree of latitude varies slightly with latitude, being longer near the poles Correct answer.
  3. Longitude is measured in statute miles rather than nautical miles
  4. The length of a degree of latitude is constant everywhere on the surface

Explanation

Because the Earth bulges at the equator and flattens at the poles, a degree of latitude is slightly longer near the poles than near the equator. For most PPL navigation this variation is small, but it explains why precise distance calculations use spheroidal models. The nautical mile is tied to the mean value of one minute of latitude.

Question 12Basic Navigation Principles and the Earth

A chart states that one inch represents 10 nautical miles. What is the representative fraction?

  1. 1:10,000
  2. 1:729,600 Correct answer.
  3. 1:1,000,000
  4. 1:60,000

Explanation

One nautical mile equals 6,080 feet, so 10 nautical miles is 60,800 feet, or 729,600 inches. A scale of one inch to 10 nautical miles therefore corresponds to a representative fraction of 1:729,600. The representative fraction expresses the ratio of chart distance to ground distance in the same units.

Question 13Basic Navigation Principles and the Earth

What is the purpose of the graticule on an aeronautical chart?

  1. To depict terrain elevation and obstacles
  2. To indicate the location of radio navigation aids and their frequencies
  3. To provide the network of meridians and parallels for fixing and plotting positions Correct answer.
  4. To show the boundaries of controlled and restricted airspace

Explanation

The graticule is the grid of latitude and longitude lines overlaid on the chart, allowing positions to be read and plotted. Airspace boundaries, navaid symbols and terrain shading are separate chart overlays. Without a graticule, a navigator could not relate chart features to geographic coordinates.

Question 14Basic Navigation Principles and the Earth

At the equator, a degree of longitude is approximately how long?

  1. About 42 nautical miles
  2. About 30 nautical miles
  3. About 90 nautical miles
  4. About 60 nautical miles Correct answer.

Explanation

At the equator the meridians are farthest apart, so one degree of longitude equals about 60 nautical miles, matching one degree of latitude there. As latitude increases, the distance represented by a degree of longitude decreases by the cosine of the latitude. This is why the latitude scale is used for measuring distance on a Mercator chart.

Question 15Basic Navigation Principles and the Earth

What is meant by a position given as 'dead reckoning'?

  1. A position derived from the intersection of two radio bearing lines
  2. A position confirmed by a satellite navigation receiver
  3. A position calculated from a known previous position using heading, speed and elapsed time Correct answer.
  4. A position fixed by visual reference to ground features

Explanation

Dead reckoning is the process of estimating the present position by advancing a known starting point using the flown heading, the estimated speed and the time elapsed. It does not depend on external fixes, so it accumulates error over time. It is normally updated by visual, radio or satellite fixes.

Question 16Basic Navigation Principles and the Earth

An aircraft flies a track of 090 degrees true and its magnetic variation is 8 degrees west. What is the magnetic track?

  1. 098 degrees Correct answer.
  2. 082 degrees
  3. 090 degrees
  4. 270 degrees

Explanation

When variation is west, magnetic north lies west of true north, so the magnetic track is greater than the true track. Adding 8 degrees to 090 gives 098 degrees magnetic. The rule of thumb is 'variation west, magnetic best; variation east, magnetic least'.

Question 17Basic Navigation Principles and the Earth

Which statement best describes magnetic dip, or inclination?

  1. The angle between the aircraft heading and the actual track flown
  2. The angle the Earth's magnetic field makes with the horizontal, increasing toward the magnetic poles Correct answer.
  3. The horizontal angle between true north and magnetic north at a place
  4. The rate of change of magnetic variation over time

Explanation

Magnetic dip is the angle at which the Earth's field lines dip below the horizontal, being zero near the magnetic equator and 90 degrees at the magnetic poles. It affects compass behaviour, which is why compasses are balanced for the latitude band in which they are used. It is distinct from variation, which is a horizontal angular difference.

Question 18Basic Navigation Principles and the Earth

A pilot measures a distance of 120 nautical miles on a Mercator chart and the scale at the departure point is 1:1,000,000. If the flight is flown toward higher latitude, what must the pilot do to measure the leg correctly?

  1. Assume the printed scale applies at all latitudes
  2. Use the longitude scale at the equator
  3. Use the latitude scale at the mean latitude of the leg Correct answer.
  4. Use the scale printed at the top of the chart only

Explanation

Because the Mercator scale increases with latitude, a single distance measurement should be taken against the latitude scale near the mean latitude of the leg. Using the scale from a different latitude introduces error proportional to the latitude difference. The printed scale is valid only at the latitude to which it refers.

Question 19Basic Navigation Principles and the Earth

How many degrees of longitude correspond to one hour of time difference?

  1. 15 degrees Correct answer.
  2. 60 degrees
  3. 1 degree
  4. 24 degrees

Explanation

The Earth rotates through 360 degrees in 24 hours, which equals 15 degrees per hour. This relationship underlies the definition of time zones and is used when converting between local time and UTC during flight planning. It is a direct consequence of the Earth's rotation rate.

Question 20Basic Navigation Principles and the Earth

A route is planned along a parallel of latitude at 70 degrees North. Which statement about this route is correct?

  1. It is a great circle and therefore the shortest possible route
  2. It is shorter than the great circle because it stays at high latitude
  3. It is the same length as the great circle at that latitude
  4. It is a small circle and is longer than the great circle between the same two points Correct answer.

Explanation

A parallel of latitude other than the equator is a small circle, because its plane does not pass through the Earth's centre. Flying along it is therefore longer than the great circle connecting the same endpoints, and the difference becomes pronounced at high latitude. Great-circle routes between points on the same parallel usually curve poleward of the parallel.

Question 21Charts, Publications and Flight Planning

On a PPL navigation chart, what does a line joining points of equal magnetic variation represent, and how is the variation value shown along it?

  1. An isobar, labelled with the pressure in hectopascals
  2. An isogon, labelled with the variation in degrees east or west Correct answer.
  3. A contour, labelled with the terrain elevation in feet
  4. An isotherm, labelled with the temperature in degrees Celsius

Explanation

Isogons are lines of equal magnetic variation, and each is labelled with the value in degrees east or west so the pilot can interpolate the variation at any position between them. Isbars and contours belong to weather and terrain depiction respectively, not to magnetic reference.

Question 22Charts, Publications and Flight Planning

A VFR flight plan is normally required to be submitted before departure. Which statement best describes the standard filing window relative to estimated off-block time?

  1. Only after airborne, once the aircraft has established radio contact
  2. At least 60 minutes before departure, or such other period as the State prescribes Correct answer.
  3. Only when the flight crosses an international border
  4. At least 10 minutes before departure in all States without exception

Explanation

ICAO guidance uses a default of at least 60 minutes before estimated off-block time, while individual States may prescribe a different period, so the pilot must check the State's AIP. Filing is a ground activity done before departure, and it is required for many flights that never leave national airspace.

Question 23Charts, Publications and Flight Planning

In a standard position report to an ATS unit, which item follows immediately after the aircraft identification?

  1. Position
  2. Next position and estimated time
  3. Altitude or flight level
  4. Time over position Correct answer.

Explanation

The standard order is aircraft identification, position, time, altitude or flight level, next position and estimated time, and the succeeding significant point. Time is reported immediately after the position so the controller can fix the aircraft in space and time together.

Question 24Charts, Publications and Flight Planning

What is the purpose of the semi-circular rule when planning a VFR cruise level?

  1. To guarantee terrain clearance over high ground
  2. To keep aircraft below the transition altitude at all times
  3. To separate opposing traffic by assigning levels according to the magnetic track Correct answer.
  4. To ensure aircraft remain clear of controlled airspace

Explanation

The semi-circular rule assigns cruise levels by magnetic track so that aircraft on reciprocal tracks are separated vertically. Tracks from 000 to 179 degrees use one set of levels and 180 to 359 degrees use the other, with the quadrantal variant used in some States.

Question 25Charts, Publications and Flight Planning

What does the maximum take-off mass (MTOM) published in an aircraft flight manual represent?

  1. The mass of the aircraft plus reserve fuel only
  2. The greatest mass at which the aircraft may commence the take-off run Correct answer.
  3. The mass used for landing distance calculations
  4. The mass at which the aircraft must climb at best angle

Explanation

MTOM is the maximum mass, including fuel and payload, at which the take-off may be started, and it is a structural and performance limit. It is compared with the actual take-off mass computed in the load sheet before departure.

Question 26Charts, Publications and Flight Planning

An aircraft is loaded such that its centre of gravity falls within the forward limit but outside the aft limit. What is the correct planning action?

  1. Redistribute or reduce load so the centre of gravity lies within both limits Correct answer.
  2. Reduce fuel until the aft limit is reached
  3. Increase power to compensate for the aft loading
  4. Accept the loading because the forward limit is satisfied

Explanation

Both the forward and aft centre-of-gravity limits must be satisfied simultaneously; being inside one limit does not excuse exceeding the other. Load must be redistributed or reduced, and the load sheet recalculated, before flight.

Question 27Charts, Publications and Flight Planning

Which document provides the authoritative, State-published information on aerodromes, navigation aids, airspace and procedures for a given country?

  1. The company operations manual
  2. The pilot's personal logbook
  3. The aircraft flight manual
  4. The Aeronautical Information Publication (AIP) Correct answer.

Explanation

The AIP is the State's primary publication of lasting aeronautical information and is the reference for aerodromes, airspace and procedures. NOTAM and AIP supplements amend it for temporary or short-notice changes.

Question 28Charts, Publications and Flight Planning

On an aeronautical chart, a controlled airspace boundary is depicted by a particular line style. Which feature identifies the class and vertical limits of that airspace?

  1. The size of the aerodrome symbol inside the boundary
  2. A boundary line accompanied by a label giving the airspace class and its upper and lower limits Correct answer.
  3. The magnetic variation value printed along the line
  4. The colour of the terrain shading beneath the boundary

Explanation

Airspace boundaries are annotated with the class and the vertical limits, often as a fraction with upper limit over lower limit, so the pilot knows exactly what applies inside. Terrain shading, variation labels and symbol size carry unrelated information.

Question 29Charts, Publications and Flight Planning

A pilot plans a VFR flight and needs the lowest altitude that provides a defined terrain clearance along the route. Which chart or publication value is designed for this purpose?

  1. The minimum sector altitude or grid minimum off-route altitude shown for the area Correct answer.
  2. The magnetic variation along the route
  3. The transition level in force at the destination
  4. The aerodrome reference temperature

Explanation

Minimum sector altitudes and grid minimum off-route altitudes are published specifically to give a safe terrain clearance within a defined area, usually with a stated buffer. The pilot selects the highest applicable value along the route.

Question 30Charts, Publications and Flight Planning

An aircraft cruises at a true airspeed of 120 knots. The wind is 020 degrees at 20 knots, and the planned magnetic track is 090 degrees. Which statement correctly describes how the wind affects the ground speed and heading?

  1. The ground speed is increased by the full 20 knots regardless of wind direction
  2. A crosswind component exists, so the heading must be offset into wind and ground speed differs from true airspeed Correct answer.
  3. Ground speed equals true airspeed because the wind is not a direct headwind
  4. The heading equals the track because wind only affects ground speed

Explanation

Wind at 020 degrees relative to a 090-degree track is largely a crosswind from the left, so the aircraft must be turned into wind to hold the track and the along-track component changes ground speed. Only a wind exactly aligned with track leaves heading equal to track.

Question 31Charts, Publications and Flight Planning

A NOTAM is issued for a temporary restricted area active during specified hours. How should the pilot incorporate this into flight planning?

  1. Check the NOTAM validity and times and plan the route or timing to remain clear while it is active Correct answer.
  2. Assume the area is inactive unless ATC mentions it in flight
  3. Ignore it because NOTAMs apply only to commercial operators
  4. Treat the NOTAM as advisory only and overfly as planned

Explanation

A NOTAM is authoritative for temporary changes, and the pilot must check validity periods and plan around the restriction while it is active. Prohibited and restricted areas are legally binding when active, not advisory.

Question 32Charts, Publications and Flight Planning

In flight-planning terms, what does the 'P' in the PLOG (navigation log) column heading for fuel normally denote?

  1. Fuel remaining at that point, calculated from fuel flow and elapsed time Correct answer.
  2. Position error at that point
  3. Passenger load at that point
  4. Pressure altitude at that point

Explanation

A navigation log tracks fuel remaining along the route, derived from planned fuel flow and elapsed time so the pilot can compare actual with planned. Passenger load, pressure altitude and position error are recorded elsewhere or not at all in that column.

Question 33Charts, Publications and Flight Planning

A pilot must convert a true course to a magnetic course for chart plotting. Given a true course of 095 degrees and a variation of 7 degrees west, what is the magnetic course?

  1. 095 degrees
  2. 088 degrees
  3. 078 degrees
  4. 102 degrees Correct answer.

Explanation

With westerly variation, magnetic is greater than true: add the westerly variation to the true course. 095 plus 7 gives 102 degrees magnetic. Easterly variation would be subtracted.

Question 34Charts, Publications and Flight Planning

What is the significance of the transition altitude for a pilot flying under VFR in controlled airspace?

  1. It marks the upper limit of controlled airspace
  2. It is the altitude at which the landing gear must be retracted
  3. Below it the altimeter is set to the standard setting, above it to the local setting
  4. Below it the altimeter is set to the local pressure setting, above it to the standard setting Correct answer.

Explanation

At and below the transition altitude the altimeter uses the aerodrome or regional pressure setting, and above it the standard setting of 1013.25 hPa is used, with the transition layer between. This gives a common reference for aircraft at higher levels.

Question 35Charts, Publications and Flight Planning

An aerodrome chart shows a declared distance labelled TORA. What does this value represent?

  1. The landing distance available from the threshold
  2. The take-off run available, being the length of runway declared suitable for the ground run of an aircraft taking off Correct answer.
  3. The total distance to clear a 50 ft screen at take-off
  4. The distance from the runway end to the stopway

Explanation

TORA is the take-off run available, the runway length declared for the ground run. It is one of the declared distances alongside TODA, ASDA and LDA, each serving a different performance calculation.

Question 36Charts, Publications and Flight Planning

A pilot is planning a flight and the destination forecast indicates the weather will be below the VFR minima at the estimated time of arrival. What is the appropriate planning response?

  1. Plan an alternate destination or delay so that a legal arrival under VFR is achievable Correct answer.
  2. File IFR without holding the appropriate rating or clearance
  3. Proceed as planned and rely on a special VFR clearance being available
  4. Reduce the planned fuel to save weight and increase speed

Explanation

Flight planning must ensure the flight can be completed legally under the applicable minima, so an alternate or a delay is the correct response. Special VFR is not guaranteed and cannot be assumed during planning.

Question 37Charts, Publications and Flight Planning

Which of the following best describes the function of a waypoint in a navigation plan?

  1. A defined geographical position used to build the route and to report or sequence along it Correct answer.
  2. An airspace class assigned along the route
  3. A fuel quantity checked at each leg
  4. A radio frequency used for position reporting

Explanation

A waypoint is a defined position, named or coded, that anchors the route and provides reference points for navigation, reporting and sequencing. Frequencies, airspace classes and fuel quantities are separate planning elements.

Question 38Charts, Publications and Flight Planning

A pilot computes a leg of 90 nautical miles at a ground speed of 120 knots. How long does the leg take, and how much fuel is used at a flow of 30 litres per hour?

  1. 40 minutes and 20 litres
  2. 45 minutes and 22.5 litres Correct answer.
  3. 30 minutes and 15 litres
  4. 60 minutes and 30 litres

Explanation

Time equals distance divided by ground speed: 90 divided by 120 is 0.75 hours, or 45 minutes. Fuel is flow multiplied by time: 30 times 0.75 equals 22.5 litres.

Question 39Charts, Publications and Flight Planning

What is the role of the aircraft weight and balance schedule in pre-flight planning?

  1. It certifies the aircraft's airworthiness for the flight
  2. It provides the route and altitude to be flown
  3. It records the radio frequencies for the flight
  4. It confirms that the loaded mass and centre of gravity remain within the certified limits Correct answer.

Explanation

The weight and balance schedule, completed as a load sheet, verifies that the take-off and landing masses and the centre of gravity are within certified limits. It does not define the route, frequencies or airworthiness status.

Question 40Charts, Publications and Flight Planning

A pilot intends to cross a national border under VFR. Which planning element is specifically required that a purely domestic flight may not need?

  1. A reduced fuel reserve because of the longer distance
  2. A flight plan and customs, immigration and border-crossing arrangements at the point of entry Correct answer.
  3. A higher cruise level than the semi-circular rule permits
  4. A second altimeter set to the standard pressure

Explanation

Crossing a border under VFR requires a flight plan and compliance with customs, immigration and any designated point-of-entry rules. The semi-circular rule, altimeter requirements and fuel reserves are unchanged by the border itself.

Question 41Charts, Publications and Flight Planning

On a chart, a line of equal magnetic variation is labelled '6°W' near the departure aerodrome and '9°W' near the destination. Which statement about the variation along the route is correct?

  1. The variation is 6°W throughout because the departure value governs
  2. The variation is constant at 7.5°W for the whole route
  3. The variation is 9°W throughout because the destination value governs
  4. The variation changes from 6°W to 9°W, so the magnetic heading must be adjusted progressively along the route Correct answer.

Explanation

Isogons show how variation varies with position, so the value changes gradually along the route and the pilot must apply the local variation at each point rather than a single figure. Using one value for the whole route introduces increasing heading error.

Question 42Charts, Publications and Flight Planning

A pilot plans a route with a leg of 60 nautical miles on a track of 090 degrees, then a leg of 60 nautical miles on a track of 180 degrees. Assuming equal ground speed and no wind, which statement about the total time and the direct distance from start to finish is correct?

  1. The direct distance is about 85 nautical miles, so the two-leg route takes longer than a direct flight Correct answer.
  2. The direct distance is 60 nautical miles, half the sum of the legs
  3. The direct distance is 120 nautical miles, equal to the sum of the legs
  4. The direct distance equals the sum of the legs because the turns cancel

Explanation

The legs form a right angle, so the direct distance is the hypotenuse of a right triangle with sides of 60, about 85 nautical miles. The two-leg route covers 120 nautical miles, so the direct flight is shorter.

Question 43Charts, Publications and Flight Planning

A pilot is choosing between the highest applicable minimum sector altitude along the route and a grid minimum off-route altitude for the area. Which planning principle applies?

  1. Either value may be used at the pilot's discretion
  2. The value at the destination alone is sufficient
  3. The lowest value may be used because it applies somewhere along the route
  4. The highest relevant minimum value along the route must be used to ensure terrain clearance throughout Correct answer.

Explanation

Terrain clearance must be assured for every part of the route, so the highest applicable minimum along the route governs. Using a lower value from another sector or area leaves parts of the route without the required clearance.

Question 44Charts, Publications and Flight Planning

A pilot computes a magnetic heading using variation and deviation but neglects to apply the wind correction. Which statement best describes the consequence during flight?

  1. The aircraft will fly the reciprocal of the planned track
  2. The aircraft will fly the planned track with no effect on time
  3. The aircraft will fly the planned track but at a reduced ground speed
  4. The aircraft will drift off the planned track, and the error grows with time and with the crosswind component Correct answer.

Explanation

Heading must combine variation, deviation and wind correction; omitting the wind correction leaves a crosswind component that produces drift away from track. The resulting error accumulates with time and is larger with a stronger crosswind.

Question 45Charts, Publications and Flight Planning

A pilot's flight plan uses a cruise level that is legal under the semi-circular rule, but the aircraft's true airspeed at that level exceeds the maximum permitted for the airspace class. What is the correct planning decision?

  1. Keep the level because the semi-circular rule takes precedence over airspace limits
  2. Select a level or route that satisfies both the track-based level rule and the airspace speed limit Correct answer.
  3. Keep the level and accept the speed exceedance as a minor deviation
  4. Keep the level and reduce speed only after entering the airspace

Explanation

All applicable requirements must be met simultaneously, so the plan must be changed to satisfy both the level rule and the airspace speed limit. Compliance with one rule does not excuse breaching another.

Question 46Charts, Publications and Flight Planning

Under ICAO Annex 4, a current aeronautical chart that is superseded by a new edition normally carries which indication on its face?

  1. The word 'SUPERSEDED' printed prominently
  2. A note that it remains valid until withdrawn
  3. The chart's own edition number only
  4. The effective date of the replacement edition Correct answer.

Explanation

ICAO Annex 4 requires that a chart which is to be replaced be marked with the effective date of the edition that supersedes it, so a user can see at a glance when the sheet goes out of date. This is a chart-content requirement, not an operator's internal control.

Question 47Charts, Publications and Flight Planning

A pilot is selecting a chart for pre-flight planning of a flight along airways at FL 310 over a large landmass. Which ICAO chart type is designed for this purpose?

  1. Enroute Chart - ICAO Correct answer.
  2. Aerodrome Obstacle Chart - ICAO Type A
  3. Aeronautical Chart - ICAO 1:500 000
  4. World Aeronautical Chart - ICAO 1:1 000 000

Explanation

The ICAO Enroute Chart is produced specifically to serve navigation along airways and routes, showing radio navigation aids, airways and relevant airspace at the appropriate scale. The other chart types serve aerodrome, visual or small-scale planning functions.

Question 48Charts, Publications and Flight Planning

A pilot is planning a flight and the operator's fuel policy requires a final reserve plus a contingency allowance. Which planning document normally records the leg-by-leg fuel, time and ground speed figures used to verify the plan?

  1. The navigation log (PLOG) Correct answer.
  2. The ATC flight plan form
  3. The aircraft technical log
  4. The load sheet

Explanation

The navigation log is the working document in which each leg's heading, ground speed, time and fuel are computed and then totalled for the flight. The technical log, load sheet and ATC flight plan form record maintenance, mass and balance, and ATS information respectively.

Question 49Charts, Publications and Flight Planning

A pilot plans a route using an aeronautical chart whose graticule is graduated in degrees of latitude and longitude, and the planned track is drawn as a straight line between two points. On which chart projection is a straight line approximately a great circle?

  1. Lambert conformal conic projection Correct answer.
  2. Polar stereographic projection
  3. Mercator projection
  4. Transverse Mercator projection

Explanation

On a Lambert conformal conic chart, which is the standard ICAO enroute projection at mid-latitudes, a straight line closely approximates a great circle, so tracks drawn straight are nearly geodesic. Mercator charts show a rhumb line as a straight line but distort great circles into curves.

Question 50Charts, Publications and Flight Planning

A pilot is preparing a flight plan and must state total endurance. The planned flight time is 3 hours 20 minutes, the contingency allowance is 30 minutes and the final reserve is 45 minutes. What total endurance should be entered?

  1. 5 hours 05 minutes
  2. 4 hours 35 minutes Correct answer.
  3. 3 hours 50 minutes
  4. 4 hours 05 minutes

Explanation

Endurance entered on a flight plan is the total time the aircraft can remain airborne, so the planned flight time is summed with the contingency allowance and the final reserve: 3 h 20 min + 30 min + 45 min = 4 h 35 min. Each allowance must be included, since endurance is not the same as planned trip time.