CPC Subgroup
G01S 5/12 by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial
Full Title
Position-fixing by co-ordinating two or more direction or position line determinations; Position-fixing by co-ordinating two or more distance determinations > using radio waves (using satellite radio beacon systems for determining position G01S19/00) > by co-ordinating position lines of different shape, e.g. hyperbolic, circular, elliptical or radial