ATPL nav 4

What are the key properties of orthomorphism?

• They must be in degrees true

• All meridians must cross at 90° angles

• The scale at any given point must constant over short distances

• Angles and bearings between features on the chart and in real life must be the same.

On a Mercator projection Rhumb lines are ??? and great circles are ???

• straight

  curved convex to the nearest pole

• straight

  Curved concave to the nearest pole

• curved convex to the nearest pole

  straight

• Curved concave to the nearest pole

  straight

On a lamberts conformal Rhumb lines are ??? and great circles are???

• straight

  curved convex to the nearest pole

• Curved convex to the nearest pole

  straight

• Curved concave to the nearest pole

  straight

• straight

  curved concave to the nearest pole

On a polar stereographic Rhumb lines are ??? and great circles are???

• Both are curved convex to the pole at all times

• curved concave to the poles at 75° and straight lines higher,

  curved concave to the poles

• Both are straight lines below 75° and are curved concave higher

• curved concave to the poles,

  curved concave to the poles upto 75° and straight lines higher

Tracks on IFR maps are?

• great circles

  degrees true

• great circles

  degrees magnetic

• Rhumb lines

  degrees true

• Rhumb lines

  degrees magnetic

What is the purpose of sing degrees grid?

• To avoid having to use variation

• To avoid a change in heading with a change in latitude

• To have a constant track to maintain on lamberts and polar stereographic charts.

• To have a constant track on Mercator charts

What is grivation?

• Variation corrected for gravity anomalies close to the poles

• The angle used to convert between degrees true and degrees grid

• A combination of convergence and magnetic variation

• The correction angle from degrees gravity to degrees magnetic

A solid black triangle on an IFR chart is?

• A radio navaid

• A non-compulsory reporting point

• A vortac

• A compulsory reporting point

35

3800

• 35nm

  3800ft MSA

• 35ft MSA

  3800nm

• 3500ft MSA

  3800nm

• 35km

  3800MSA

What kind of chart is the Auckland oceanic IFR chart?

• Polar stereographic

• Mercator

• Lamberts conformal

• boring