AIRPT_PROIX

16 codes

** AIRPORT PROXIMITY
A ON AIRPORT
B ON SEAPLANE BASE
C ON HELIPORT
D ON BARGE/SHIP/PLATFORM
E IN TRAFFIC PATTERN
F WITHIN 1/4 MILE
G WITHIN 1/2 MILE
H WITHIN 3/4 MILE
I WITHIN 1 MILE
J WITHIN 2 MILES
K WITHIN 3 MILES
L WITHIN 4 MILES
M WITHIN 5 MILES
N BEYOND 5 MILES
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.