Narrative:

I had aircraft X coming up from at 32;000 feet on the wrong transponder code which does not track up unless manually tracked up by the controller. I had several aircraft southbound climbing through the corridor towards tadpo. I had traffic head-on with aircraft X at 31;000 feet that I could not descend the aircraft X through so I called traffic and advised aircraft X to expect lower soon. We had all the warning areas active with no activity in them and made it more difficult to turn aircraft to avoid a collision. This is always the case when the warning areas go active. I turned aircraft Y to a 170 heading and advised the pilot to expedite through 33;000 feet and also turned the aircraft X 20 degrees left. My turns should have been sufficient to avoid less than 5 miles however both aircraft had a TCAS resolution and aircraft X said he was advised to climb at which point I advised him that the other [aircraft] was expediting his climb and to please descend; he went against my wishes. I believe I had 3 miles at the same altitude because aircraft Y was advised by TCAS to stop the climb. They were both at 33;000 feet with 3 miles. Had nothing else to say or do after that. I do believe that the warning areas along with TCAS made this situation worse.getting rid of the warning areas surrounding the fixes that go through the airspace should be looked at for the future. There are more and more flights going to or through the airspace with restrictions of 15 miles in trail. Not only is that difficult to do; the corridor is not wide enough to even have two airways run through it so both northbound and southbound are head on and the northbound need to descend into the airports and the southbound aircraft are all climbing. This situation is only going to get worse or the newer controllers will be unable to climb aircraft above 23;000 feet. It is not a good and safe situation. I have been working in this area for [many] years and the traffic has increased with no changes to the warning areas. If this is not fixed then aircraft will have to have a ground delay program to overfly the [airspace] to this destination.

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Original NASA ASRS Text

Title: A ZMA Controller descended one aircraft and climbed another aircraft head on. The Controller issued turns to the aircraft but had less than required lateral separation.

Narrative: I had Aircraft X coming up from at 32;000 feet on the wrong transponder code which does not track up unless manually tracked up by the controller. I had several aircraft southbound climbing through the corridor towards TADPO. I had traffic head-on with Aircraft X at 31;000 feet that I could not descend the Aircraft X through so I called traffic and advised Aircraft X to expect lower soon. We had all the warning areas active with no activity in them and made it more difficult to turn aircraft to avoid a collision. This is always the case when the warning areas go active. I turned Aircraft Y to a 170 heading and advised the pilot to expedite through 33;000 feet and also turned the Aircraft X 20 degrees left. My turns should have been sufficient to avoid less than 5 miles however both aircraft had a TCAS resolution and Aircraft X said he was advised to climb at which point I advised him that the other [aircraft] was expediting his climb and to please descend; he went against my wishes. I believe I had 3 miles at the same altitude because Aircraft Y was advised by TCAS to stop the climb. They were both at 33;000 feet with 3 miles. Had nothing else to say or do after that. I do believe that the warning areas along with TCAS made this situation worse.Getting rid of the warning areas surrounding the fixes that go through the airspace should be looked at for the future. There are more and more flights going to or through the airspace with restrictions of 15 miles in trail. Not only is that difficult to do; the corridor is not wide enough to even have two airways run through it so both northbound and southbound are head on and the northbound need to descend into the airports and the southbound aircraft are all climbing. This situation is only going to get worse or the newer controllers will be unable to climb aircraft above 23;000 feet. It is not a good and safe situation. I have been working in this area for [many] years and the traffic has increased with no changes to the warning areas. If this is not fixed then aircraft will have to have a ground delay program to overfly the [airspace] to this destination.

Data retrieved from NASA's ASRS site and automatically converted to unabbreviated mixed upper/lowercase text. This report is for informational purposes with no guarantee of accuracy. See NASA's ASRS site for official report.