Intro To Charts

Question 1

Graticule

Answer 1

Lines of equal latitude and longitude

Question 2

Conical projections

Answer 2

Uses cones with a small circle as the circle of tangency e.g parallel of latitude

Lamberts projection

Question 3

Plane projection

Answer 3

Flat plane that the earth is projected onto from the opposite end of the earth, so only has one point fo contact

Used for polar stereographic charts

Question 4

Cylindrical projections

Answer 4

Piece of paper is wrapped around the earth with the earth projected onto it from the centre of the earth.

Has a great circle as its tangency, a direct Mercator chart is an example of this

Question 5

Orthomorphic chart

Answer 5

A conformal chart

Graticule must cross at right angles
Scale is the same or changes equally in all directions locally

Scale is correct and all angles are correct

Question 6

Grid MORA

Answer 6

Min off route altitude

If you fly at this alt you will not hit anything

Question 7

Min mast height on a chart

Answer 7

Less than 300ft then the mast doesn’t need to be reported to the CAA