Patent ID: 7826999

Claim:
A magnetic tilt compensated heading compass comprising: a means for communicating with a means for calculating a tilt compensated heading; a first and second magnetic field sensor for acquiring magnetic field data aligned with respect to each other at an included angle β; and a first and second accelerometer for acquiring tilt compensation data and aligned such that the first and second accelerometer are operable with the first and second magnetic field sensors; wherein the magnetic tilt compensated heading compass communicates magnetic field and tilt compensation data to a means for calculating a tilt compensated heading operable to calculate a heading such that the tilt compensated [Heading] equals ATAN2{Y″/X″} wherein X″ is the tilt compensated magnetic field vector in the X direction in the earth frame of reference and Y″ is the tilt compensated magnetic field vector in the Y direction in the earth frame of reference and wherein at least one of said first and second magnetic field sensors has a tilt in a ±Z axis direction of angle θ wherein 2≦θ≦88 degrees, absolute.