IPC Subgroup
G01C 21/08 involving use of the magnetic field of the earth
Introduced: September 1968
Last revised: January 2006
Full Title
Navigation; Navigational instruments not provided for in groups > by terrestrial means > involving use of the magnetic field of the earth
Classification Context
- Section:
- PHYSICS
- Class:
- MEASURING; TESTING
- Subclass:
- MEASURING DISTANCES, LEVELS OR BEARINGS; SURVEYING; NAVIGATION; GYROSCOPIC INSTRUMENTS; PHOTOGRAMMETRY OR VIDEOGRAMMETRY