TABLE 7. VISIBILITY 
Code 
0 Dense fog --------------------------------- 50 yards 
1 Thick fog -------------------------------- 200 yards 
2 Fog -qnnn--- 2-9-2 nnn 400 yards 
3 Moderate fog ---------------------------- 1000 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 ---- 9-22-29 -- nnn 22 == == === Bluish-green (or blue green) 
4Q ---------------------------- Green 
50 --------9-------2992-------- Light Green 
60 ---------------------------- Yellowish-green 
70 -2-- 2-9 nnn nnn == Yellow green 
80 ------- 2-92-9292 - == === Green yellow 
90 ---------------------------- Greenish-yellow 
99 ----------------------=-=-=- Yellow 
121 
