with north-seeking magnetic elements, e.g. needles

Introduced: September 1968

Last revised: January 2006

Full Title

Compasses; Devices for ascertaining true or magnetic north for navigation or surveying purposes > Magnetic compasses > with north-seeking magnetic elements, e.g. needles

Classification Context

Section:: PHYSICS
Class:: MEASURING; TESTING
Subclass:: MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY

4 direct subcodes

Child Classifications

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G01C 17/06 Suspending magnetic elements
G01C 17/1 Comparing observed direction with north indication
G01C 17/18 Supporting or suspending compasses, e.g. by gimbal, by flotation
G01C 17/2 Observing the compass card or needle