Atlas/ Pre-1982 Codebook/ OBSTRUCTIONS_
NTSB · Form 6120.4
OBSTRUCTIONS_
OBSTRUCTIONS_
9 codes
- ** OBSTRUCTIONS
- A TREES
- B WIRES/POLES
- C FENCES
- D BUILDINGS
- E ELECTRONIC TOWERS
- F NONE
- 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.