Atlas/ Pre-1982 Codebook/ OBSTRUCT_VISION
NTSB · Form 6120.4
OBSTRUCT_VISION
OBSTRUCT_VISION
12 codes
- ** OBSTRUCTIONS TO VISION AT ACCIDENT SITE
- A DUST
- B FOG
- C GROUND FOG
- D HAZE
- E ICE FOG
- F SMOKE
- G BLOWING DUST
- H BLOWING SAND
- I BLOWING SNOW
- J 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.