=600 D ATA PROCESSING SEABIRDS KING, WATSON, GOULD 



95 Thunderstorm, slight or mod- 



erate, without hail* but with 

 rain and/or snow at time of 

 observation. 



96 Thunderstorm, slight or mod- 



erate, with hail* at time of 

 observation. 



97 Thunderstorm, heavy, without 



hail* but with rain and/or 

 snow at time of observation. 



98 Thunderstorm combined with 



duststorm or sandstorm at 

 time of observation. 



99 Thunderstorm, heavy, with 



hail* at time of observation. 



29 



*Hail, small hail, soft hail. 



J 



Thunderstorm at time of 

 observation. 



TABLE 4. —Codes for environmental deck 



State of sea: 52 



Flat calm 



1 Less than 1 foot 



2 1 to 3 feet 



3 3 to 5 feet 



4 5 to 8 feet 



5 8 to 12 feet 



6 12 to 20 feet 



7 20 to 40 feet 



8 40 feet and over 



9 Very rough, confused sea 



Visibility: 53 



Dense fog. 50 yards 



1 Thick fog 200 yards 



2 Fog 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 

 (Use range-finder readings of known land) 



Moon age: 60 



No data 



New 



1/4 



1/2 



3/4 



Full 



Not up 



Cloud cover: 61 



No clouds 



1 Less than 1/10, or 1/10 



2 2/10 and 3/10 



3 4/10 



4 5/10 



5 6/10 



6 7/10 and 8/10 



7 9/10 and 9/10 plus 



8 10/10 



9 Sky obscured 



U.S. GOVERNMENT PRINTING OFFICE : 1967— 0-24 8-334 



