Chapter 12 : Departure

Question 1

QB: What is Departure?

Answer 1

Distance between 2 meridians along a specified parallel of latitude. Usually in nm.

Question 2

Where is Departure maximum?

Answer 2

At equator - 1 degree change in longitude (d. long.) =

60 minutes of arc of G.C. = 60 nm

Question 3

Departure at poles?

Answer 3

0

Question 4

QB: Departure varies as -

Answer 4

Cosine of Latitude

Away from equator, distance along a parallel of latitude for 1 degree longitude difference -

Reduces at the rate of - Cosine of Latitude.

Question 5

QB: Departure =

Answer 5

d.long (min.) X cosine latitude

Question 6

Since Departure along a parallel of latitude, it represents -

Answer 6

Rhumb Line distance