Narrative:

Climbing from 10;500 to 12;500 ft; northwest bound on V105; talking to nellis control. My TAS (traffic alert system) (not a full TCAS) sounded a verbal warning: 'traffic 12 o'clock; one mile; same altitude'; and displayed a visual warning on my garmin 530. After a brief search I saw the other aircraft; descending through my altitude; head-on. We both saw each other at about the same time with maybe a quarter-mile separation; closing speed probably 300 KTS. We both turned right; and passed each other with approximately a 200 ft horizontal clearance; and no vertical separation. We both were already in communication with nellis control; and the controller did not call out the traffic to either of us. I believe that controller distraction may have lead to this omission; I think he was working military traffic on UHF. I also feel that if my TAS system had not warned me; there could likely have been a collision due to GPS navigation accuracy. The other aircraft apparently had a TAS system as well; as he told nellis he had seen me on his traffic system. We both reported the incident to nellis control; but I did not file a formal near-miss report; I do not know if the other pilot did.

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Original NASA ASRS Text

Title: C180 pilot reports a NMAC with an opposite direction Columbia northwest of LAS on V105. The C180 pilot was climbing and the other descending and both were talking to Nellis Control; but no warning was provided. Both aircraft were equipped with a TAS; which allowed both pilots to take evasive action.

Narrative: Climbing from 10;500 to 12;500 FT; northwest bound on V105; talking to Nellis Control. My TAS (Traffic Alert System) (not a full TCAS) sounded a verbal warning: 'Traffic 12 o'clock; one mile; same altitude'; and displayed a visual warning on my Garmin 530. After a brief search I saw the other aircraft; descending through my altitude; head-on. We both saw each other at about the same time with maybe a quarter-mile separation; closing speed probably 300 KTS. We both turned right; and passed each other with approximately a 200 FT horizontal clearance; and no vertical separation. We both were already in communication with Nellis Control; and the Controller did not call out the traffic to either of us. I believe that Controller distraction may have lead to this omission; I think he was working military traffic on UHF. I also feel that if my TAS system had not warned me; there could likely have been a collision due to GPS navigation accuracy. The other aircraft apparently had a TAS system as well; as he told Nellis he had seen me on his traffic system. We both reported the incident to Nellis Control; but I did not file a formal near-miss report; I do not know if the other pilot did.

Data retrieved from NASA's ASRS site as of July 2013 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.