Table 2-15: Number of Pilot-Reported Near Midair Collisions (NMAC) by Degree
of Hazard
Excel | CSV
| TOTAL, degree of hazard |
568 |
758 |
454 |
348 |
311 |
254 |
275 |
238 |
194 |
238 |
211 |
257 |
239 |
211 |
180 |
| Criticala |
118 |
180 |
74 |
52 |
46 |
35 |
47 |
32 |
26 |
31 |
22 |
28 |
30 |
37 |
25 |
| Potentialb |
319 |
423 |
266 |
197 |
195 |
158 |
139 |
139 |
101 |
105 |
100 |
110 |
130 |
R96 |
81 |
| No hazardc |
122 |
133 |
114 |
99 |
70 |
61 |
71 |
63 |
55 |
70 |
53 |
55 |
49 |
R51 |
39 |
| Unclassifiedd |
9 |
22 |
0 |
0 |
0 |
0 |
18 |
4 |
12 |
32 |
36 |
64 |
30 |
R27 |
P35 |
| NMAC involving aircraft operating under 14 CFR 121e |
U |
U |
121 |
101 |
72 |
60 |
63 |
43 |
50 |
81 |
64 |
63 |
69 |
48 |
51 |
KEY: P = preliminary; R = revised; U = data are not available.
a A situation where collision avoidance was due to chance, rather
than an act on the part of the pilot. Less than 100 feet of aircraft separation
would be considered critical.
b An incident that would probably have resulted in a collision
if no action had been taken by either pilot. Less than 500 feet would usually
be required in this case.
c When direction and altitude would have made a midair collision
improbable, regardless of evasive action taken.
d No determination could be made due to insufficient evidence or
unusual circumstances, or because incident is still under investigation.
e Before Mar. 20, 1997, 14 CFR 121 applied only to aircraft with
more than 30 seats or a maximum payload capacity of more than 7,500 pounds.
Since Mar. 20, 1997, 14 CFR 121 includes aircraft with 10 or more seats that
formerly operated under 14 CFR 125. This change makes it difficult to compare
pre-1997 data with more recent years' data.
NOTE
Includes air carriers, general aviation, military, and other aircraft involved
in public-use operations.
SOURCES
1980-2000: U.S. Department of Transportation, Federal Aviation Administration,
Aviation Safety Statistical Handbook Annual Report (Washington,
DC: Annual issues) and personal communication, Aug. 6, 2002.
2001-2002: Ibid., Office of System Safety, National Aviation Safety Data Analysis
Center, NMAC database, personal communication, July 2, 2003.
For NMAC involving 121 aircraft:
1980-2000: Ibid., Air Traffic Resource Management, personal communications,
Aug. 6, 2002.
2001-2002: Ibid., Office of System Safety, National Aviation Safety Data Analysis
Center, NMAC database, personal communication, July 2, 2003.
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