Cat II Confusion
07-09-2017, 02:17 PM
#1
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Cat II Confusion
I'm going over some ATP test questions and I'm getting different answers on the Cat II.
Question 9329-1:
The lowest CAT II minimums are: DH 150 and RVR 1600.
However, question 9329-2: The lowest authorized ILS minimums associated with CAT II approaches are: DH 100 and RVR 1200.
So, which one is it? Why does the FAA have different DHs and RVRs for the CAT II???
Thanks.
Question 9329-1:
The lowest CAT II minimums are: DH 150 and RVR 1600.
However, question 9329-2: The lowest authorized ILS minimums associated with CAT II approaches are: DH 100 and RVR 1200.
So, which one is it? Why does the FAA have different DHs and RVRs for the CAT II???
Thanks.
07-09-2017, 03:09 PM
#2
Gets Weekends Off
Joined APC: Jul 2013
Posts: 460
First answer is wrong, my suspicion is it's a cat 1 SA.
The standard cat II ILS is 100 DH and 1200 RVR. There are exceptions for airport and aircraft equipment.
The standard cat II ILS is 100 DH and 1200 RVR. There are exceptions for airport and aircraft equipment.
07-09-2017, 06:34 PM
#3
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Joined APC: Oct 2008
Position: JAFO- First Observer
Posts: 997
Check out FAA Orders 8400.13D and 6750.24E for all kinds of great info on CAT 2 & 3...
07-10-2017, 04:59 AM
#4
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Joined APC: Dec 2010
Posts: 3,090
Originally Posted by Aviationluver
I'm going over some ATP test questions and I'm getting different answers on the Cat II.
Question 9329-1:
The lowest CAT II minimums are: DH 150 and RVR 1600.
However, question 9329-2: The lowest authorized ILS minimums associated with CAT II approaches are: DH 100 and RVR 1200.
So, which one is it? Why does the FAA have different DHs and RVRs for the CAT II???
Thanks.
Question 9329-1:
The lowest CAT II minimums are: DH 150 and RVR 1600.
However, question 9329-2: The lowest authorized ILS minimums associated with CAT II approaches are: DH 100 and RVR 1200.
So, which one is it? Why does the FAA have different DHs and RVRs for the CAT II???
Thanks.
Standard CAT II minimums are DH 100 and RVR 1200, but not all CAT II approaches will have those exact minimums.
07-11-2017, 10:11 AM
#5
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Posts: 39,244
100 and 1200 is correct.
07-11-2017, 12:31 PM
#6
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Joined APC: Jul 2005
Posts: 248
A standard Cat II is 100 DH and 1200 RVR. The ground equipment requirements for a Cat II to 1600 RVR or 1200 RVR are the same, the difference is the requirement for a rollout RVR sensor for the Cat II to 1200 RVR, and a Mid RVR sensor if the runway is greater than 8000' in length.
This is why, if the reported RVR is 1600 or greater, then if the Mid and Rollout RVR sensors are inoperative or unavailable, the approach may still be flown regardless of the published Cat II RVR minimums.
For non-standard lighting, there are Cat II Special Authorization approaches to 1200 RVR and 100'.
Finally, while most Cat II approaches are published to 1200 RVR, there may be a ballnote that states Cat II to 1000 RVR is authorized with specific OPSPEC approval and auto land or HUD is required.
This is why, if the reported RVR is 1600 or greater, then if the Mid and Rollout RVR sensors are inoperative or unavailable, the approach may still be flown regardless of the published Cat II RVR minimums.
For non-standard lighting, there are Cat II Special Authorization approaches to 1200 RVR and 100'.
Finally, while most Cat II approaches are published to 1200 RVR, there may be a ballnote that states Cat II to 1000 RVR is authorized with specific OPSPEC approval and auto land or HUD is required.
07-12-2017, 10:37 AM
#7
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Joined APC: Jan 2014
Position: Fixed Wing
Posts: 40
InFO for Operators
FAA. inFO: 12002
Tried to link it to the message here,
The one I viewed are Wilmington plates 2012 update from the FAA.
FAA. inFO: 12002
Tried to link it to the message here,
The one I viewed are Wilmington plates 2012 update from the FAA.
07-12-2017, 11:03 AM
#8
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Position: Fixed Wing
Posts: 40
Fairbanks for the Cat 11 example there,
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