INSTRM_APPROH

36 codes

** TYPE OF INSTRUMENT APPROACH
0 VOR DME-STRAIGHT-IN
1 VOR DME-CIRCLING
2 LOC-STRAIGHT-IN
3 LOC-CIRCLING
4 LOC-DME-STRAIGHT-IN
5 LOC-DME-CIRCLING
6 ILS (CATEGORY II)
7 ILS (CATEGORYIII)
88 MLS
99 RNAV
A LFR - STRAIGHT-IN
B LFR - CIRCLING
C VOR/TVOR-STRAIGHT-IN
D VOR/TVOR-CIRCLING
E ADF-STRAIGHT-IN
F ADF-CIRCLING
G ILS WITH ADVISORY-STRAIGHT-IN
H ILS WITH ADVISORY-CIRCLING
I ILS WITHOUT ADVISORY STA
J ILS WITHOUT ADVISORY-CIRCLING
K ILS-BACKCOURSE-STRAIGHT-IN
L ILS-BACKCOURSE-CIRCLING
M GCA-STRAIGHT-IN
N GCA-CIRCLING
P PPI-STRAIGHT-IN
Q PPI-CIRCLING
R CONTROLLED VFR-STRAIGHT-IN
S CONTROLLED VFR-CIRCLING
T PAR (PRECISION)
U ASR (SURVEILLANCE)
V CONTACT APPROACH
W VISUAL APPROACH
X TACAN
Y OTHER
Z UNKNOWN/NOT REPORTED

Source

Codes verbatim from the ct_Pre1982 table of PRE1982.MDB — the FAA-distributed pre-1982 NTSB aviation accident database. Used internally by the Atlas to decode legacy accident records on every pre-1982 NTSB event page.