DO-185B Change 2 - Electronic
DO-185B Change 2 - Minimum Operational Performance Standards for Traffic Alert and Collision Avoidance System II (TCAS II)
Change 2 to DO-185B provides for the following changes:
- Improved efficiency of the TCAS surveillance function designed to reduce utilization of the 1030 and 1090 MHz channel without reducing the effectiveness of the equipment's collision avoidance function.
- Allows TCAS to implement a narrow band Mode S receive function compatible with the RTCA/DO-260B ADS-B receiver requirements without negatively impacting the TCAS receiver function.
- Updates the flight test requirements to add Atlanta, GA as an alternate location for high density Mode S flight testing and to modify the combined air and ground density requirement accordingly.
- Decreases the TCAS RA broadcast interval from 8 seconds to 1 second to be compatible with the intended use of this data by ground controllers.
DO-185B Change 2-PDF