Best of Luck G-NAV Practise Practise Test. GNav PRACTISE TEST. To Join Online classes Contact : Capt.Louis Lobo 9004751779 Kindly Fill in the details. 1 / 130 An aircraft is flying around the Earth eastwards along the 60N parallel of latitude at a ground speed of 360 knots. At what ground speed would another aircraft have to fly eastwards along the Equator to fly once round the Earth in the same journey time? 600 knots 240 knots 720 knots 120 knots 2 / 130 Pressure Altitude is 28 000 feet, OAT = -45°C, Mach No = 0.46, W/V = 270/85, Track = 200°T. What is the drift and groundspeed? 18L / 252 knots 15R / 310 knots 17L / 228 knots 17R / 287 knots 3 / 130 What is the highest latitude listed below at which the Sun will rise above the horizon and set every day? 68N 66N 62N 72N 4 / 130 Heading is 156°(T), TAS is 320 knots, W/V is 130/45 and the Variation is 10°W. What is your magnetic track? 170 150 160 222 5 / 130 On a Lambert chart, the convergence factor is .78585. What is the parallel of tangency? 51°02’ 51°36’ 51°15’ 51°48’ 6 / 130 What is the duration of civil twilight? From the moment when the centre of the Sun is on the sensible horizon until the centre reaches a depression angle of 6° from the sensible horizon. From the moment when the tip of the Sun disappears below the sensible horizon until the centre reaches a depression angle of 6° from the sensible horizon. From the moment when the centre of the Sun is on the visual horizon until the centre reaches a depression angle of 6° from the sensible horizon. From the moment when the tip of the Sun disappears below the visual horizon until the centre reaches a depression angle of 6° from the sensible horizon 7 / 130 At what times of the year does the length of the hours of daylight change most rapidly? Spring Equinox and Autumn Equinox Summer Solstice and Winter Solstice Spring Equinox and Summer Solstice Autumn Equinox and Winter Solstice 8 / 130 G/S = 240 knots, Distance go = 530 NM. What is time to go? 27min 29min 2h 05min 2h 12min 9 / 130 How many nautical miles are travelled in 1 minute 45 seconds at a ground speed of 135 knots? 2.36 3.25 39.0 3.94 10 / 130 Given: Airport elevation is 1000 feet. QNH is 988 hPa What is the approximate airport pressure altitude? 320 1680 -320 680 11 / 130 Civil Twilight occurs between: Sunset and 6° below the horizon 6° and 12° below the horizon 12° and 18° below the horizon Sunrise and Sunset 12 / 130 Given: Magnetic heading 311° Drift is 10° left Relative bearing of NDB 270. What is the magnetic bearing of the NDB measured from the aircraft? 221° 208° 211° 180° 13 / 130 Isogonal lines converge as follows: At the North Magnetic Pole At the North and South Magnetic and both Geographical Poles At the North and South Magnetic Poles At the Magnetic equator 14 / 130 The agonic line: is midway between the magnetic North and South poles follows the geographic equator is the shorter distance between the respective True and Magnetic North and South poles indicates zero variation 15 / 130 At 0422 you are 185 NM from a VOR at FL370. You need to descend at a mean descent rate of 1800’/min to be at FL80 overhead the VOR. Your ground speed in the level cruise is currently 320 knots. In the descent your mean G/S will be 232 knots. What is the latest time to commence descent? 0437 0441 0445 0451 16 / 130 Please refer to Appendix A. What is the chart symbol for a lightship? 6 8 9 12 17 / 130 What is the reason for seasonal changes in climate? Because the Earth’s spin axis is inclined to the plane of its orbit round the Sun Because the distance between the Earth and the Sun varies over a year Because the Earth’s orbital speed round the Sun varies according to the time of the year Because of the difference between the Tropical Year and the Calendar Year 18 / 130 What is the definition of magnetic variation? The angle between the direction indicated by a compass and Magnetic North The angle between True North and Compass North. The angle between Magnetic North and True North The angle between Magnetic Heading and Magnetic North. 19 / 130 You fly from 49N to 58N along the 180 E/W meridian. What is the distance in kilometres? a. 540 km b. 804 km c. 1222 km d. 1000 km 20 / 130 Fuel flow per hr is 22 US.gal, total fuel on board is 83 imp.gal. What is the endurance? 2 hr 15 min 4 hr 32 min 3 hr 12 min 3 hr 53 min 21 / 130 On a Lambert’s chart the constant of the cone is 0.80. A is at 53N 04W. You plan to fly to B. The initial Lambert’s chart straight-line track is 070(T) and the rhumb line track from A to B is 080(T). What is the longitude of B? 021E 034W 011E 015E 22 / 130 An aircraft is at FL140 with an IAS of 210 and a true OAT of -5°(C). The wind component is -35 knots. When the aircraft is at 150 NM from a reporting point, ATC request the crew to lose 5 minutes by the time they get to the beacon. How much do they need to reduce IAS? 15 kts 25 kts 30 kts 20 kts 23 / 130 Your pressure altitude is FL55, the QNH is 998, and the SAT is +30°(C). What is density altitude? 6980ft 7750 ft 8620ft 10020 ft 24 / 130 The value of variation is zero at the magnetic equator cannot exceed 180° has a maximum value of 45° E or 45° W can exceed 180° 25 / 130 A compass swing is performed in order to correct for: acceleration deviation variation aperiodicity 26 / 130 On which chart projection is it not possible to show the North Pole? Direct Mercator Lambert’s Transverse Mercator Polar Stereographic 27 / 130 The chart that is generally used for navigation in polar areas is based on a: Direct Mercator Projection Gnomonic projection Lambert conformal projection Stereographic projection 28 / 130 You are on an ILS 3-degree glide slope which passes over the runway threshold at 50 feet. Your DME range is 25 NM from the threshold. What is your height above the runway threshold elevation? (Use the 1 in 60 rule and 6000 feet = 1 nautical mile) 7450ft 6450ft 7550ft 8010ft 29 / 130 The angle between the true great circle track and the true rhumb line track joining the following points: A (60S 165W) and B (60S 177E) at the place of departure A? 9 15.6 5.2 7.8 30 / 130 An aircraft at FL370 is required to commence descent at 120 NM from a VOR and to cross the facility at FL130. If the mean GS for the descent is 288 kt, the minimum rate of descent required is: 920 ft/min 890 ft/min 860 ft/min 960 ft/min 31 / 130 What is the weight in kilograms of 380 US Gallons at a Specific Gravity of 0.78? 1123 2470 5434 543 32 / 130 Grivation is the combination of Variation and Deviation Deviation and the Agonic value Variation and Grid Convergence Grid Convergence and Deviation 33 / 130 A useful method of a pilot resolving, on a visual flight, any uncertainty in the aircraft’s position is to maintain visual contact with the ground and: set heading towards a line feature such as a coastline, river or motorway fly the reverse of the heading being flown prior to becoming uncertain until a pinpoint is obtained fly expanding circles until a pinpoint is obtained fly reverse headings and associated timings until the point of departure is reached 34 / 130 An aircraft homing to a VOR/DME loses 2500 feet in 11.1 NM change of DME range. What is the gradient of the slope? 4.1 % 3.5 % 3.9 % 3.7 % 35 / 130 Given: Track 198°, Heading 184°, TAS 427 kt and GS 453kt, what are the W/V and Drift Angle? 280°/110kt and 14°P 087°/109kt and 14°S 116°/110kt and 14°S 294°/110kt and 14°P 36 / 130 A Lambert’s Conical conformal char .891 .788 .656 .707 37 / 130 The pressure alt is 29 000 feet and the SAT is -55°(C). What is density altitude? 27 500 feet 26 000 feet 30 000 feet 31000 ft 38 / 130 Given: Aircraft height = 2500 feet, ILS GP angle = 3°, at what approximate distance from the threshold can you expect to intercept the glide-path? 8.0 NM 14.5 NM 13.1 NM 7.0 NM 39 / 130 An aircraft departs a point 0400N 17000W and flies 240 NM South, followed by 240 NM East, then 240 NM North, then 240 NM West. What is its final position? 0400N 17000W 0600S 17000W 0400N 170°35.9’W 0400N 170°01.8’W 40 / 130 At what latitude does the maximum difference between geodetic and geocentric latitude occur? 0° 45° 60° 90° 41 / 130 On a chart, 90.74 km is represented by 7.0 centimetres. What is the scale? 1 / 700 000 1 / 2 015 396 1 / 1 296 400 1 / 1 156 600 42 / 130 By what amount must you change your rate of descent given a 10 knot decrease in headwind on a 3° glide slope? 50 feet per minute increase 30 feet per minute increase 50 feet per minute decrease 30 feet per minute decrease 43 / 130 5 hours 20 minutes and 20 seconds time difference is equivalent to which change of longitude? 81°30’ 78°15’ 79°10’ 80°05’ 44 / 130 On a particular direct Mercator wall chart, ‘the full length of the parallel of latitude at 53N is 133 cm long. What is the scale of the chart at 30S? 1: 30 000 000 1: 18 000 000 1: 21 000 000 1: 26 000 000 45 / 130 You are flying 090°(C) heading. Deviation is 2W and Variation is 12E. Your TAS is 160 knots. You are flying the 070 radial outbound from a VOR and you have gone 14 NM in 6 minutes. What is the W/V? 158°(T) / 51 060°(T) / 50 340°(T) / 25 055°(T) / 25 46 / 130 What is the highest latitude on the Earth at which the Sun can be vertically overhead? 23½° 66½° 45° 90° 47 / 130 Required course 045°(T), W/V = 190 /30, FL = 55 @ ISA, Variation = 15°W. CAS = 120 knots. What is mag heading and G/S? 052°(M). 154 067°(M) 154 037°(M) 154 037°(M) 113 48 / 130 What rate of descent is required to maintain a 3.5° glide slope at a ground speed of 150 knots? 850 fpm 800 fpm 600 fpm 875 fpm 49 / 130 Position A is at 70S 030W, position B is 70S 060E. What is the great circle track of B from A, measured at A? 132°(T) 048°(T) 090°(T) 228°(T) 50 / 130 Isogonals are lines of equal: compass deviation magnetic variation wind velocity pressure 51 / 130 The value of magnetic variation on a chart changes with time. This is due to Movement of the magnetic poles, causing an increase Increase in the magnetic field, causing an increase Reduction in the compass deviation, causing a decrease Movement of the magnetic poles, which can cause either an increase or a decrease 52 / 130 On a 5% glide slope your groundspeed is 150 kt. What should be your rate of descent to maintain the glide slope? 750ft/min 450 feet/min 900 feet/min 650ft/min 53 / 130 On a particular take-off, you can accept up to 10 knots tailwind. The runway QDM is 047, the variation is 17°E and the ATIS gives the wind direction as 210. What is the maximum wind strength you can accept? 18 kts 4 kts 8 kts 11 kts 54 / 130 At the magnetic equator Dip is zero Variation is always maximum Deviation is zero The isogonal is an agonic line 55 / 130 In which months is the difference between apparent noon and mean noon the greatest? November and February January and July March and September June and December 56 / 130 What is a line of equal grivation? An isocline An isogonal An isogriv An isovar 57 / 130 An aircraft leaves at 0900UTC on a 250 NM journey with a planned ground speed of 115 knots. After 74 NM the aircraft is 1.5 minutes behind the planned schedule. What is the revised ETA at the destination? 1100 1110 1115 1054 58 / 130 Which of these is a correct statement about the Earth’s magnetic field? It has no effect on aircraft deviation. The angle of dip is the angle between the vertical and the total magnetic force. It may be temporary, transient, or permanent. It acts as though there is a large blue magnetic pole in Northern Canada 59 / 130 An aircraft at position 0000N/S 16327W flies a track of 225°(T) for 70 NM. What is its new position? 0049N 16238W 0049S 16238W 0049N 16416W 0049S 16416W 60 / 130 An aircraft flies a great circle track from 56°N 070°W to 62°N 110°E. The total distance travelled is: 3720 NM 5420 NM 1788 NM 2040 NM 61 / 130 You are heading 345°(M), the variation is 20°E, and you take a radar bearing of 30° left of the nose from an island. What bearing do you plot from the island? 160 T 155 T 140 T 180 T 62 / 130 The sensitivity of a direct reading magnetic compass is: Inversely proportional to the horizontal component of the Earth’s magnetic field Inversely proportional to the vertical and horizontal components of the Earth’s magnetic field. Inversely proportional to the vertical component of the Earth’s magnetic field. Proportional to the horizontal component of the Earth’s magnetic field 63 / 130 The angle between the plane of the Equator and the plane of the Ecliptic is: 66.5 23.5 25.3 65.6 64 / 130 In which month does aphelion occur? Jan Mar Jul Nov 65 / 130 Given: IAS 120 kt FL80 OAT +20°(C) What is the TAS? 141 kt 102 kt 120 kt 132 kt 66 / 130 An aircraft at position 60°N 005°W tracks 090°(T) for 315 km. On completion of the flight the longitude will be: 010°40’W 000°15’E 000°40’E 002°10’W 67 / 130 On the Polar Stereographic projection, a great circle appears as: a straight line a curve which becomes more near to a straight line as the latitude increases a curve convex to the nearer pole a curve which can be concave or convex to the nearer pole, depending on the latitude 68 / 130 Given: Position A is 60N 020W, Position B is 60N 021W, and Position C is 59N 020W, what are, respectively, the distances from A to B and from A to C? 60 NM and 30 NM 30 NM and 60 NM 52 NM and 60 NM 60 NM and 52 NM 69 / 130 What is the maximum possible value of Dip Angle at either Pole? 66 180 90 45 70 / 130 At 1000 hours an aircraft is on the 310 radial from a VOR/DME, at 40 nautical miles range. At 1015 the radial and range are 040/40 NM. What is the aircraft’s track and ground speed? 080° / 226 knots 085° / 226 knots 080° / 56 knots 085° / 90 knots 71 / 130 Lines of latitude on a chart are always Great circles Small circles except for the Equator Vertices Meridians 72 / 130 The orbit of the Earth round the Sun is elliptical. An ellipse has 2 foci. Which of the following is a correct statement? The Earth is positioned at one of the foci The Sun is positioned at the mid-point of the 2 foci. The Sun is positioned at one of the foci. The Earth is positioned at the mid-point of the 2 foci. 73 / 130 Given that the value of ellipticity of the Earth is 1/297 and that the semi-major axis of the Earth, measured at the axis of the Equator is 6378.4 km, what is the semi- minor axis of the Earth measured at the axis of the Poles? 6399.9 km 6367.0 km 6378.4 km 6356.9 km 74 / 130 Given: Runway direction 083°(M), Surface W/V 035/35 kt. Calculate the effective crosswind component. 24 kt 26 kt 31 kt 34 kt 75 / 130 What is the dip angle at the North Magnetic Pole? 0 90 180 64 76 / 130 Convert 80 metres/sec into knots. 155 knots 55 knots 160 knots 16 knots 77 / 130 Given: True course 300° Drift 8°R Variation 10°W Deviation -4° Calculate the compass heading. 322° 306° 278° 294° 78 / 130 During a low level flight 2 parallel roads are crossed at right angles by an aircraft. The time between these roads can be used to check the aircraft: track drift ground speed heading 79 / 130 The angle between True North and Magnetic North is known as: deviation dip alignment error variation 80 / 130 An aircraft flies 100 stat.m in 20 minutes. How long does it take to fly 215 NM? 50 min 37 min 57 min 42 min 81 / 130 Position A is 55N 30W. Position B is 54N 20W. The great circle track from A to B, measured at A, is 100°(T). What is the rhumb line bearing from A to B? 104°(T) 090°(T) 100°(T) 284°(T) 82 / 130 An aircraft’s compass must be swung: If the aircraft has been in the hangar for a long time and has been moved several times. If the aircraft has been subjected to hammering. Every maintenance inspection After a change of theatre of operations at the same magnetic latitude. 83 / 130 Where is a compass most effective? About midway between the equator and the Magnetic North Pole In the region of the magnetic South Pole In the region of the magnetic North Pole On the geographic equator 84 / 130 An aircraft is flying at FL200, the OAT is 0°C. When the actual air pressure on an airfield at MSL is placed on the subscale of the altimeter the indicated altitude is 19 300 ft. What is the aircraft’s True Altitude? a. 17 300 ft b. 19 300 ft c. 20 000 ft d. 21 300 ft 85 / 130 Given: FL350, Mach 0.80, OAT -55°(C), calculate values for TAS and LSS 461 kt, LSS 296 kt 461 kt, LSS 576 kt 237 kt, LSS 296 kt 86 / 130 ‘ISA Dev = +30°C, Pressure alt = 5000 feet. What is true alt? 4550ft 5600ft 4290ft 5320ft 87 / 130 Please refer to Appendix A. What does symbol 9 represent? lit obstacle lighthouse VRP aeronautical ground light 88 / 130 At 65 NM from a VOR you commence a descent from FL330 in order to arrive over the VOR at FL80. Your mean ground speed in the descent is 240 knots. What rate of descent is required? 1540 feet/min 1630 feet/min 1270 feet/min 1830 feet/min 89 / 130 An aircraft at position 2700N 17000W travels 3000 km on a track of 180°(T), then 3000 km on a track of 090°(T), then 3000 km on a track of 000°(T), then 3000 km on a track of 270°(T). What is its final position? 2700N 17318W 0000N/S 17000W 2700N 17000W 2700N 14300W 90 / 130 On a chart, meridians at 45N are shown every 10 degrees apart. This is shown on the chart by a distance of 14 cm. What is the scale? 1: 2 000 000 1: 4 000 000 1: 5 000 000 1: 5 600 000 91 / 130 Given: For take-off an aircraft requires a headwind component of at least 10 kt and has a cross-wind limit of 35 kt. The angle between the wind direction and the runway is 45°. Calculate the maximum and minimum allowable wind speeds. 15 kt and 50 kt 15 kt and 43 kt 12 kt and 38 kt 18 kt and 50 kt 92 / 130 The scale on a Lambert’s conformal conic chart is constant along a meridian of longitude is constant along a parallel of latitude varies slightly as a function of latitude and longitude is constant across the whole map 93 / 130 A Lambert conformal conic chart has a constant of the cone of 0.80. A straight line course drawn on this chart from A (53°N 004°W) to B is 080° at A; course at B is 092°. What is the longitude of B? 019°E 008°E 009°36’E 011°E 94 / 130 The main reason that day and night, throughout the year, have different durations is due to the: Earth’s rotation relative speed of the Sun along the ecliptic inclination of the ecliptic to the Equator gravitational effect of the Sun and the Moon on the speed of rotation of the Earth 95 / 130 An island is observed to be 15°(T)o the left. The aircraft heading is 120°(M), variation 17°(W). The bearing (°T) from the aircraft to the island is: 268 302 088 122 96 / 130 You are heading 080°(T) when you get a range and bearing fix from your AWR on a headland at 185 NM 30° left of the nose. What true bearing do you plot on the chart? 050 from the headland, using the headland’s meridian 050 from the headland, using the aircraft’s meridian 230 from the headland, using the headland’s meridian 230 from the headland, using the aircraft’s meridian 97 / 130 What is the meaning of the term ‘standard time’? It is another term for UTC It is the time zone system applicable only in the USA. It is an expression for local mean time. It is the time set by the legal authorities for a country or part of a country. 98 / 130 Given: Runway direction 083°(M), Surface W/V 045/35 kt. Calculate the effective headwind component. 29kt 27kt 31kt 34kt 99 / 130 If variation is East, then True North is West of Magnetic North Compass North is West of Magnetic North True North is East of Magnetic North Magnetic North is West of Compass North 100 / 130 What is the formula for conversion angle? Change of longitude × Sine latitude Change of longitude / 2 × Sine mean longitude Change of longitude / 2 × Sine mean latitude Change of longitude × Cosine latitude 101 / 130 You are homing to overhead a VORTAC and will descend from 7500 QNH to be 1000 AMSL by 6 NM DME. Your ground speed is 156 knots and the ROD will be 1000 feet/min. At what range from the VORTAC do you commence the descent? 22.9 NM 15.8 NM 16.9 NM 30.2 NM 102 / 130 On a direct Mercator chart, a rhumb line appears as a small circle concave to the nearer pole straight line curve convex to the nearer pole spiral curve 103 / 130 An aircraft is at 10°N and is flying North at 444 km/hour. After 3 hours the latitude is 10°S 02°S 22°N 00°N/S 104 / 130 What is the chart convergence factor on a Polar Stereographic chart? 0 1.0 0.866 0.5 105 / 130 Given: TAS = 485 kt, OAT = ISA +10°C, FL410. Calculate the Mach Number. 0.87 0.825 0.90 0.85 106 / 130 How do rhumb lines (with the exception of meridians) appear on a Polar Stereographic chart? concave to the nearer pole convex to the nearer pole ellipses round the pole straight lines 107 / 130 What is the rhumb line track from A (4500N 01000W) to B (4830N 00500W)? 045°T 030°T 225°T 150°T 108 / 130 You leave A to fly to B, 475 NM away, at 1000 hours. Your ETA at B is 1130. At 1040, you are 190 NM from A. What ground speed is required to arrive on time at B? 342 knots 330 knots 317 knots 360 knots 109 / 130 An aircraft at position 8500N 02000E flies a rhumb line track of 075°(T). What will be its path over the Earth? The shortest route to a destination A spiral path leading towards the North Pole A great circle route continuing over the pole and then southwards over the other side An increasing track angle 110 / 130 The distance between two waypoints is 200 NM. To calculate compass heading the pilot used 2°E magnetic variation instead of 2°W. Assuming that the forecast W/V applied, what will the off track distance be at the second waypoint? 14 NM 7 NM 0 NM 21 NM 111 / 130 Ground speed is 540 knots. 72 NM to go. What is time to go? 8 min 9 min 18 min 12 min 112 / 130 Your position is 5833N 17400W. You fly exactly 6 NM westwards. What is your new position? 5833N 17411.5W 5833N 17355W 5833N 17340W 5833N 17348.5W 113 / 130 Given: Heading 165(M), Variation 25W, Drift 10°R, G/S 360 knots. At ‘A’ your relative bearing to an NDB is 325R. Five minutes later, at ‘B’, the relative bearing is 280(R). What is the true bearing and distance from ‘B’ to the NDB? 060°(T) 40 NM 105°(T) 30 NM 060°(T) 30 NM 105°(T) 40 NM 114 / 130 Isogrivs are lines that connect positions that have: the same grivation the same variation 0°(M)agnetic dip the same horizontal magnetic field strength 115 / 130 What is the effect on the Mach number and TAS in an aircraft that is climbing with constant CAS? Mach number decreases; TAS decreases Mach number increases; TAS remains constant Mach number increases; TAS increases Mach number remains constant; TAS increases 116 / 130 An aircraft starts at position 0410S 17822W and heads true north for 2950 NM, then turns 90 degrees right, and maintains a rhumb line track for 314 kilometres. What is its final position? 5500N 17422W 4500N 17422W 5500N 17738E 4500N 17738E 117 / 130 A-C = 50nm (A-B = 30nm, B-C=20nm) ATA A is 1010. ETA B is 1030. ETA C is 1043. ATA B is 1027. What is revised ETA C? 1040 1043 1038 1036 118 / 130 What is the diameter of the Earth? 40 000 km 12 732 km 21 600 km 6366 km 119 / 130 The relative bearing to a beacon is 090°R. Three minutes later, at a ground speed of 180 knots, it has changed to 135°R. What was the distance of the closest point of approach of the aircraft to the beacon? 45 NM 18 NM 9 NM 3 NM 120 / 130 What is the shortest distance between Point ‘A’ (3543N 00841E) and Point ‘B’ (5417N 17119W)? 5400 NM 6318 NM 6557 NM 6000 NM 121 / 130 You are at FL150 and the SAT is -5°(C). You are over an airport with an elevation of 720 feet. The QNH is 1003. Assume 27 feet = 1 hPa. What is your true height? 14 300 feet 15 300 feet 14 700 feet 15 600 feet 122 / 130 Course 040°(T), TAS 120 kt, Wind speed = 30 knots. From which direction will the wind give the greatest drift? 220°(T) 230°(T) 235°(T) 245°(T) 123 / 130 The rhumb line distance between points A (60°00’N 002°30’E) and B (60°00’N 007°30’W) is: 300 NM 450 NM 600 NM 150 NM 124 / 130 An aircraft is at 5530N 03613W, where the variation is 15W. It is tuned to a VOR located at 5330N 03613W, where the variation is 12W. What VOR radial is the aircraft on? 348 012 165 015 125 / 130 On a conformal chart, the standard parallels are 41° 20’N and 11° 40’N. What is the constant of the cone? .660 .202 .446 .895 126 / 130 The distance A to B is 90 NM in a straight line. You are 60 NM from A when you fix your position 4 NM to the left of track. What correction do you need to make to arrive at B? 4 8 12 10 127 / 130 TAS = 240 knots. Track is 180°(T). The relative bearing from an NDB is 315(R) at 1410. At 1420 the bearing has changed to 270(R). What is your distance from the NDB at 1420? 40nm 50nm 60nm 70nm 128 / 130 How does scale change on a normal Mercator chart? Expands as the cosine of the latitude Expands directly with the secant of the latitude Correct on the standard parallels, expands outside them, contracts within them Expands as the secant of the E/W great circle distance 129 / 130 On a direct Mercator chart, great circles are shown as Curves convex to the nearer pole Straight lines Rhumb lines Curves concave to the nearer pole 130 / 130 A rhumb line is: the vertex of a conformal polyformic projection a straight line on a Lambert’s conformal chart a line on the Earth which cuts all meridians at the same angle the shortest distance between two points on the Earth’s surface Your score isThe average score is 0% LinkedIn Facebook 0% Reattempt Test ACE YOUR EXAMS WITH US Share this content Opens in a new window X Opens in a new window Facebook Opens in a new window Pinterest Opens in a new window LinkedIn You Might Also Like QUIZ TEST 1 April 6, 2026 Leave a Reply Cancel replyCommentEnter your name or username to comment Enter your email address to comment Enter your website URL (optional) Save my name, email, and website in this browser for the next time I comment.