â¢ This product is to be applied ONLY to the OUTSIDE of the rear window, not to any other window of the vehicle, as it may obstruct visibility and create a safety hazard. â¢ Install this product only in strict accordance with the provided instructions. Installing this product may reduce or impair visibility. This product is to be applied ONLY to the OUTSIDE of the rear window, not to any other window of the vehicle, as it may obstruct visibility and create a safety hazard. â¢ Install this product only in strict accordance with the provided instructions. Installing this product may reduce or impair visibility.
System (BCAS), a transponder-based. airborne system. In 1978, a second mid-air collision. occurred near San Diego between an air carrier and a. general-aviation aircraft, leading to the expansion of. the BCAS effort; in 1981, the name was changed to the. Traffic Alert and Collision Avoidance System (TCAS).
1 Traffic collision avoidance system (TCAS), which actively interrogates the transponders of other aircraft and negotiates collision-avoidance tactics with them in case of a threat. 2  TCAS systems are relatively expensive, and tend to appear only on larger aircraft. Obstacle Collision Avoidance System is a ground based system that uses a low powered radar mounted on or near the obstacle. 2  The radar detects aircraft in the proximity of the obstacle and firstly warns aircraft via flashing medium intensity lights and secondly warns aircraft of the obstacle via a VHF broadcast.