MANUAL OF MARINE METEOROLOGICAL OBSERVATIONS 



1122. SEA AND SWELL, When both sea and swell are observed, both 

 systems are to be recorded in Form 615-5 and included in the coded weather 

 message on Form 630-9. The sea data will be entered in columns 34-36 

 and coded in columns 41-43; swell data will be entered in columns 37-39 

 and coded in columns 45-47. 



1130. OBSERVER'S INITIALS. The initials of the observer taking the 

 observation will be entered on the appropriate line in column 50. 



1140. MAILING. At the completion of each trip all Forms 615-5, 

 which have one or more entries, and used barograph charts should be mailed 

 promptly in the postage- free envelopes provided. Instructions for mailing 

 the records are printed on the envelopes. 



1200. RADIO TRANSMISSION OF WEATHER OBSERVATIONS 



1210. SHIPS AUTHORIZED TO TRANSMIT WEATHER OBSERVATION 

 MESSAGES BY RADIO. Weather Bureau Marine Centers will designate the 

 ships that are authorized to transmit by radio, 0000, 0600, 1200 and 1800 

 G C T , weather observation messages to United States and foreign mete- 

 orological service ship collection centers. Meteorological ship collection 

 centers to which these regular weather observation messages should be 

 addressed from all ocean areas are contained in Weather Bureau publication 

 entitled, "United States and Foreign Radio Coast Stations Accepting Ships' 

 Weather Messages." 



1220. SPECIAL REPORTS. All ships are requested to transmit a spe- 

 cial weather message under the conditions described in paragraphs 1020 

 and 1021. 



1230. TRANSMISSION TO SHORE STATIONS. Weather observation 

 messages addressed to "Observer Washington" and "Observer San Francisco," 

 from ships in western North Atlantic and eastern North Pacific waters, re- 

 spectively, should be checked "Government" and transmitted to the nearest 

 United States Government or commercial shore station. The Weather Bureau 

 will assume the cost for transmitting weather messages to these addresses. 



1240. METEOROLOGICAL RADIOTELEGRAM. WB Form 630-9. The 

 Weather Bureau supplies meteorological radiotelegram blanks for con- 

 venience in transmitting weather observation messages by radio. After the 

 message is transmitted the form may be disposed of by the radio operator. 

 It should not be mailed to the Weather Bureau. 



