Question

Which of the following is not the angle between the horizontal component of B and true north?

(a) Magnetic declination

(b) Magnetic variation

(c) Dip angle

(d) Magvar

I have been asked this question in homework.

This question is from Vertical & Heading References in section Air Data Systems, Altitude and Heading Reference of Avionics

Answer 1

Correct option is (c) Dip angle

To explain: The magnetic declination, also called the magnetic variation or magvar, is the angle between the horizontal component of B and true north. Navigators use ‘magvar’ in order not to confuse astronomical declination with magnetic declination.