Aeronautical Charts and Units of Speed

Question 1

VNC

Answer 1

VFR Navigation Chart, scale is 1 to 500,000 (1inch to 8 miles) lambert

Question 2

WAC

Answer 2

World Aeronautical Chart, scale of 1 to 1,000,000 (1inch to 16 miles) lambert

Question 3

VTA

Answer 3

VFR Terminal Area Chart, scale of 1 to 250,000 (1inch to 4 miles)

Question 4

Labert Conformal Conic Projections

Answer 4

• created by putting a cone of paper around the top of the earth
• meridians converge in the north
• VNC and WAC
• straight line on lamber conformal conic are great circles
• projection is better for longer distances

Question 5

mercator projections

Answer 5

• created by a cylinder of paper around the earth
• meridians are parallel which is not true, creating distortion especially around the poles
• better for short distances
• straight line is a rhumb line

Question 6

tranverse mercator projetions

Answer 6

rotates cylinder 90°so the point of tangency is on a line of longitude rather than latitude. makes for better accuracy, used for VTAs

Question 7

enroute charts

Answer 7

provide info for radio nav over airways (do not show topical features)
LO - up to 18000ft
HI - 18000ft and up

Question 8

CFS

Answer 8

Canadian Flight Supplement
revised every 56 days
info on canadian and north atlantic aerodromes

Question 9

1NM = ?ft

Answer 9

6080ft

Question 10

1SM = ?ft

Answer 10

5280ft

Question 11

IAS

Answer 11

Indicated airspeed read off of ASI

Question 12

CAS

Answer 12

Calibrated airspeed, IAS corrected for position and instrument error

Question 13

TAS

Answer 13

CAS corrected for density and temperature. calculated with E6B or off ASI

Question 14

ground speed

Answer 14

speed relative to the ground

Question 15

heading vs track

Answer 15

heading is the direction the plane is facing whereas track is the direction its moving

Question 16

drift

Answer 16

difference between heading and track

Question 17

air position

Answer 17

position over earth in longitude and latitude

Question 18

bearing

Answer 18

the angle from a given point

Question 19

4 drift correction methods

Answer 19

1- visual
2- opening- closing angle method
3- double track
4- 1:60 rule

Question 20

opening-closing angle method

Answer 20

correction= opening angle + closing angle
takes you to final destination

Question 21

double track method

Answer 21

correction = opening angle x2 for the amount of time flown
puts you back on track
(cannot be used after halfway point)

Question 22

1:60 rule

Answer 22

OA=(distance off course/distance flown) x 60
CA=(distance off course/distance remaining) x 60
OA+CA= correction
takes you to final destination

Question 23

reciprocal track

Answer 23

180° of your track
if drift is left (WCA right) then double and subtract it from reciprocal heading
if drift is right (WCA left) then double it and add it from reciprocal heading