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magnetic compass
(redirected from magnetic compasses)

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magnetic compass [mag′ned·ik ′käm·pəs]
(navigation)
A compass depending for its directive force upon the attraction of the horizontal component of the earth's magnetic field for a magnetized needle or sensing element free to turn with a minimum of friction in any horizontal direction.
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Lohmann tested whether hatchlings use this light source to set their magnetic compasses.
The sea turtle's built-in compass by Bardhan, Sudipta / Highlights for Children
If you're still navigating by your old aluminum magnetic compasses, NSNs 6605-00-151-5337 or 6605-00-846-7618, turn them in before you get lost.
The right direction by PS, the Preventive Maintenance Monthly
Team leader William Cochran, of the Illinois Natural History Survey, says the birds seem to steer by a magnetic compass when migrating at night and update their magnetic compasses using the setting sun.
Sunset 'helps birds to navigate' by Coventry Evening Telegraph (England)
 
 
 
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