The Oregon series has a built-in 3-axis electronic compass with accelerometer tilt compensation, which shows where users are heading even when they are standing still, or not holding it level.

ENGADGET: Four new Oregon touchscreen GPS devices pop up on Garmin's website (updated)

Examples include the FSM-SENS-1, a 6-axis sensor-only module that integrates with an external Freespace MotionEngine, and the FSM-SI-2, which combines the Freespace MotionEngine on an embedded microprocessor along with a 3-axis digital gyroscope, 3-axis digital accelerometer and optional 3-axis magnetometer (compass) to provide high-performance, calibrated motion data for a variety of applications.

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The Geographic pole is the top of the axis on which the earth spins, the Magnetic pole is where the compass points to, and the Arctic pole is the point on the Arctic Ocean furthest from any land.

BBC: NEWS | UK | British man scores polar success