What happens internally when you calibrate a mechanical auto compass?

Small magnets are rotated to "null out" local magnet fields so the compass will accurately align to magnetic North.

Improve Answer Discuss the question "What happens internally when you calibrate a mechanical auto compass?" Watch Question

First answer by Andromeda451. Last edit by Andromeda451. Contributor trust: 70 [recommend contributor]. Question popularity: 10 [recommend question]

Research your answer:

Answers.com > Wiki Answers > Categories > Cars and Vehicles > What happens internally when you calibrate a mechanical auto compass?

Our contributors said this page should be displayed for the questions below. (Where do these come from)
If any of these are not a genuine rephrasing of the question, please help out and edit these alternates.
How do you calibrate a basic compass?