Joined: 11 Dec 2005
|Posted: Sun Jul 29, 2012 10:53 am Post subject: TCAS (Technical Notes)
A TA is a prediction that another aircraft will enter the conflict airspace in 25 to 45 seconds.
An RA is a prediction that another airplane will enter the TCAS conflict airspace within approximately 20 to 30 seconds. If altitude data from the other airplane is not available, no RA can be provided.
If the traffic airplane also has TCAS and a mode S transponder, TCAS vertical guidance is coordinated with the traffic aircraft TCAS.
TCAS Controls (Transponder Panel)
TCAS Airspace Switch
ABOVE – altitude reporting traffic from 2,700 feet below to 9,000 feet above current altitude displayed.
NORM – altitude reporting traffic from 2,700 feet below to 2,700 feet above current altitude displayed.
BELOW – altitude reporting traffic 9,000 feet below to 2,700 feet above current altitude displayed.
vertical motion arrow indicates traffic climbing or descending at 500 feet per minute or greater; not displayed for vertical motion less than 500 feet per minute.