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Obstacle Collision Avoidance System (OCAS) scans the area surrounding an obstacle. If a target is detected, the system immediately tracks the aircraft, calculates its speed, heading and altitude. If a collision hazard exists, the pilot is warned by either flashing lights and/or aural warning transmitted over the VHF band.
This innovation by a Norwegian company is nominated for "Årets ingeniørbragd 2006". Cast your vote before December 1st!