Portable collision avoidance system

TCAS is the industry standard for commercial collision avoidance systems but PCAS is gaining recognition as an effective means of collision avoidance for general aviation and is in use the world over by independent pilots in personally owned or rented light aircraft as well as by flight schools and flying clubs.

More advanced systems can integrate with EFIS, overlaying nearby aircraft on the GPS map with relative height information.

The original PCAS technology was developed in 1999 by Zane Hovey, a pilot and flight instructor, who also patented a portable ADS-b version as well.

ATC ground stations and active TCAS systems transmit interrogation pulses on an uplink frequency of 1,030 MHz.

[3] A very well known general aviation organization completed an evaluation of the PCAS XRX system to demonstrate the capabilities.

[5] XRX will recognize interrogations from TCAS, Skywatch, and any other "active" system, military protocols, and Mode S transmissions.

With relative direction, altitude and range determined, XRX displays this information and stores it in memory.