ORIENTATION DEVICE.

摘要

The orientation device includes a magnetic sensor (3) which is arranged in an item of headgear (9) worn by the observer (1) and is adapted to provide an observer with alignment data. An external unit (17) provides a preset direction to a computer (7) which compares it with the alignment data and calculates an alignment error data. The observer's alignment error with respect to the preset direction is indicated to the observer in the form of modulated tones by means of the transducer (5) which is constituted by earphones applied to the item of headgear.