How do you convert a grid azimuth to a magnetic azimuth? - ProProfs Discuss

# How do you convert a grid azimuth to a magnetic azimuth?

A. Subtract the 3.5 degrees from your azimuth.
B. Add the 3.5-degree grid magnet angle to the azimuth.
C. Subtract 3.5 degrees from your back azimuth.
D. Subtract the 5.5 degrees from your azimuth.

This question is part of Map & Geography Trivia (3P071 Volume 3)
Asked by Peter Pasion, Last updated: Oct 27, 2020

#### manmobley

Manmobley

Subtract the 3.5 degrees from your azimuth.

#### Chris Kenway

Chris Kenway, Content Writer, Jacksonville

Option A - subtract the 3.5 degree from your azimuth.
To convert grid azimuth to magnetic azimuth you have to subtract the G - M angle from the grid azimuth. For example, if GM angle is 3.5 and grid azimuth is 150, magnetic azimuth will be
Magnetic azimuth = 150 - 3.5
= 146.5
Likewise, If you need to convert magnetic azimuth to grid azimuth, you will have to add magnetic azimuth to GM angle.

#### M_Jefferson

M_Jefferson

Subtract the 3.5 degrees from your azimuth.