TOWER_UNICOM

7 codes

** TOWER/UNICOM-INSTALLED-MANNED
A TOWER INSTALLED-OPERATIVE
B TOWER INSTALLED-INOPERATIVE
C UNICOM-OPERATIVE
D UNICOM-INOPERATIVE
E NONE
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.