PART II 



OCEANOGRAPHIC CODES AND TABLES 



Table 1.— WEATHER STATE CODE 



00-49. No precipitation at the ship at the time of 

 observation. 



00-19. No precipitation, fog. duatstorm. aandstorm, or drifting snow 

 at the ship at tlie time of obserration or during tlie preceding hour, except 



00 Cloud development not ob- 



served or not observable. 



01 Clouds generally dissolving or 



becoming less developed. 



02 State of sky on the whole un- 



changed. 



03 Clouds generally forming or 



developing. 



07 



09- 



No hydrometeors 

 except clouds. 



Charade r i sti c 

 change of the 

 state of sky dur- 

 ing past hour. 



Visibility reduced by smoke, 

 e. g., veldt or forest fires, in- 

 dustrial smoke, or volcanic 

 ashes. 



Dry haze. 



Widespread dust in suspension 

 in the air, not raised by wind 

 at or near the ship at the 

 time of observation. 



Dust or sand raised by wind 

 at or near the ship at the 

 time of observation, but no 

 well developed dust devil(8), 

 and no duststorm or sand- 

 storm seen. 



Well-developed dust devil (s) 

 seen at or near the ship 

 within last hour, but no 

 duststorm or sandstorm. 



Duststorm or sandstorm with- 

 in sight of the ship or at the 

 ship during the last hour. 



Haze, dust, 

 or smoke. 



sand. 



10 Light fog (visibility 1,100 

 yards or more). 



11 Patches of. 



12 More or less continuous. 



Shallow fog at the 

 ship not deeper 

 than about 33 

 feet. 



Lightning visible, no thunder 

 heard. 



16 



Precipitation within sight, but 

 not reaching surface at the 

 ship. 



Precipitation within sight, 

 reaching surface, but dis- 

 tant (i. e., estimated to be 

 more than 3 miles from the 

 ship). 



Precipitation within sight, 

 reaching surface, near to 

 but not at the ship. 



Thunder heard, but no pre- 

 cipitation at the ship. 



18 Squall (s). 



19 Funnel cloud (s) (tornado or 



water-spout) . 



20 Drizzle (not freezing). 



21 Rain (not freezing). 



22 Snow. 



23 Rain and snow. 



24 Freezing drizzle or freezing 



rain. 



Within sight dur- 

 ing the last hour. 



Not falling 

 showers. 



25 

 26 



Shower(s) of rain. 



Shower(s) of snow, or of rain 

 and snow. 



Shower(s) of hail or of hail and 

 rain. 



Fog. 



Thunderstorm (with or with- 

 out precipitation). 



30-39. Dustfitorm. sandstorm, or drifting snow. 



30 Slight or moderate duststorm Has decreased dur- 

 or sandstorm. ing preceding 



hour. 



31 



Slight or moderate duststorm 

 or sandstorm. 



No appreciable 

 change during 

 preceding hour. 



32 Slight or moderate duststorm Has increased dur- 



or sandstorm. ing preceding 



hour. 



33 Severe duststorm or sand- Has decreased dur- 



storm. ing preceding 



hour. 



H. O. 607 



173 



