TABLE 7. VISIBILITY 



Code 



Dense fog — — — — 50 yards 



1 Thick fog — — 200 yards 



2 Fog — . 400 yards 



3 Moderate fog —— —.—_-_— jOOO yards 



4 Thin fog or mist ■• ■ 1 mile 



5 Visibility poor — ■ — • 2 miles 



6 Visibility moderate ■ 5 miles 



7 Visibility good ■ = 10 miles 



8 Visibility very good ■ 30 miles 



9 Visibility excellent — — ■ — - Over 30 miles 



TABLE 8. WATER COLOR 



Code (Percent yellow) Description 



00 ._-_„-_ .— Deep blue 



10 — — — . Blue 



20 — — ■ — ~- Greenish-blue (or green blue) 



30 — Bluish-green (or blue green) 



40 — — — ■ " — Green 



50 — --• — — ■ Light Green 



60 — — — — • .— — ■-' — Yellowish -green 



70 .- — — Yellow green 



80 " — Green yellow 



90 — ^ — — — — — — Greenish -yellow 



99 . .. — . — .— — Yellow 



53 



