TCAS-I vs TCAS-II
Thread Starter
Join Date: Sep 2007
Location: The 'Bat Cave' @ HLP in the Big Durian Indo
Age: 61
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
TCAS-I vs TCAS-II
What's the difference between TCAS-I and TCAS-II and what limitations does having only TCAS-I impose ?
Join Date: Nov 2008
Location: The New Forest, UK
Posts: 228
Likes: 0
Received 0 Likes
on
0 Posts
see Traffic Collision Avoidance System - Wikipedia, the free encyclopedia
Collision Resolution Advisories are coordinated by TCAS II between platforms before vocalised instructions are issued to pilots.
II is the one to have.
Collision Resolution Advisories are coordinated by TCAS II between platforms before vocalised instructions are issued to pilots.
II is the one to have.
Thread Starter
Join Date: Sep 2007
Location: The 'Bat Cave' @ HLP in the Big Durian Indo
Age: 61
Posts: 781
Likes: 0
Received 0 Likes
on
0 Posts
I was speaking with a technical manager of one of the local charter companies and he said if they had TCAS-II on board they could operate some of their business jets above 45,000 ft ? With TCAS-I he was saying it was 35,000ft limitation. Is this correct ?
Join Date: Jul 2008
Location: merritt island
Age: 38
Posts: 9
Likes: 0
Received 0 Likes
on
0 Posts
tcasII uses mode S transponders to give u RA's, ie an escape maneuver in the vertical plane, however if the other aircraft has mode C transponder you will not be getting any RA's, instead you get TA's ie traffic advisories, in TCAS I u can only get TA's
Join Date: Mar 2001
Location: I wouldn't know.
Posts: 4,498
Likes: 0
Received 0 Likes
on
0 Posts
That is wrong. Of course you wll get RAs against Mode C equipped aircrafts as long as they report their altitude. It just won't be coordinated as that not only needs Mode S but another TCAS II as well.
You won't get RAs against aircrafts which do not report their altitude though, simply because TCAS doesn't know in which altitude said aircraft ist. TAs are still generated to improve crew awareness.
You won't get RAs against aircrafts which do not report their altitude though, simply because TCAS doesn't know in which altitude said aircraft ist. TAs are still generated to improve crew awareness.
Join Date: Mar 2001
Location: I wouldn't know.
Posts: 4,498
Likes: 0
Received 0 Likes
on
0 Posts
Taken from the Eurocontrol ACAS FAQ:
What is the status of the development of ACAS that will issue both horizontal and vertical Resolution Advisories?
ACAS III - Airborne Collision Avoidance System that issues RAs in vertical and/or horizontal directions is also referred to as TCAS III and TCAS IV. It has not been implemented and it is unlikely to be in the near future. ICAO SARPs for ACAS III have not been developed. Currently, there are no plans to proceed with such a development.
ACAS III - Airborne Collision Avoidance System that issues RAs in vertical and/or horizontal directions is also referred to as TCAS III and TCAS IV. It has not been implemented and it is unlikely to be in the near future. ICAO SARPs for ACAS III have not been developed. Currently, there are no plans to proceed with such a development.
Join Date: Dec 2006
Location: belgium
Posts: 236
Likes: 0
Received 0 Likes
on
0 Posts
TCAS I = warnings when collision situation arises
TCAS II = same with computer that calculates best escape path vertically (in cooperation with Mode S to talk to other a/c TCAS computer). Escape path displayed in cockpit + voice
TCAS III = same, but also horizontal escape paths. Most new computers have this ready to be implemented, but not activated. But e.g. tot test a modern TCAS processor, you have to align IRS's, this is to test the horizontal system, even if it is not installed yet. I don't know how far regulations are at TCAS III.
TCAS II = same with computer that calculates best escape path vertically (in cooperation with Mode S to talk to other a/c TCAS computer). Escape path displayed in cockpit + voice
TCAS III = same, but also horizontal escape paths. Most new computers have this ready to be implemented, but not activated. But e.g. tot test a modern TCAS processor, you have to align IRS's, this is to test the horizontal system, even if it is not installed yet. I don't know how far regulations are at TCAS III.
