With the aid of a compass the traveler can find his bearings.

But we can ask that people steer themselves and their institutions with a greater reliance on a moral compass.

South is opposite north on a compass.

And they made use of a magnetic compass at least a century before the first reference to it appeared elsewhere.

A cell in the eye may be worth two in the beak, at least when it comes to a migratory bird' s magnetic compass.