Means capturing signals occurring naturally from the environment, e.g. ambient optical, acoustic, gravitational or magnetic signals

Full Title

Control of position, course, altitude or attitude of land, water, air or space vehicles, e.g. using automatic pilots > Control system inputs > Arrangements for determining position or orientation > Means capturing signals occurring naturally from the environment, e.g. ambient optical, acoustic, gravitational or magnetic signals

Classification Context

Section:

PHYSICS

Class:

CONTROLLING; REGULATING

Subclass:

SYSTEMS FOR CONTROLLING OR REGULATING NON-ELECTRIC VARIABLES