Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations

Child Classifications

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• G01S 5/0009
• G01S 5/01
• G01S 5/02 using radio waves (using satellite radio beacon systems for determining position G01S19/00)
• G01S 5/16 using electromagnetic waves other than radio waves
• G01S 5/18 using ultrasonic, sonic or infrasonic waves