OPERATION_TYPE

19 codes

** TYPE OF OPERATION
A SCHEDULED DOMESTIC PASSG.SVC
B SCHEDULED INTL PASSG SERVICE
C SCHEDULED DOMESTIC CARGO SVC
D SCHEDULED INTL CARGO SERVICE
E CHARTER-PASSENGER-DOMESTIC
F CHARTER-CARGO-DOMESTIC
G MIL CONTRACT-PASSG-DOMESTIC
H MIL CONTRACT-CARGO-DOMESTIC
I TEST
J TRAINING
K FERRY-DOMESTIC
L COMPANY FLIGHT
M CHARTER-PASSG-INTL
N CHARTER-CARGO-INTL
P MIL CONTRACT-PASSG-INTL
Q MIL CONTRACT-CARGO-INTL
R FERRY-INTERNATIONAL
Y OTHER

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.