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WB FORM 615-5 
(1-64) 
U.S. DEPARTMENT OF COMMERCE 
WEATHER BUREAU 
SHIP'S WEATHER OBSERVATIONS 
Check ( 7 ) 
TEMPERATURES (COLS. 16-18, 28-30, 32-33): 
□ 
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3-HOUR 
PRESSURE 
TENDENCY 
rorm Approved; Budget Bureau No. 41-R1258.4 
INSTRUCTIONS 
Begin a new sheet: 
a. For the first observation of a new month. 
b. At the beginning of each voyage. 
c. Upon sailing from one octant to another. 
d. Upon sailing from one ocean to another. 
Fill in the blanks on each page of the form. (Name of 
vessel, barometer number, etc.) 
Enter the coded synoptic (0000, 0600, 1200, 1800 G.C.T.) 
or special weather observations in columns 1 through 44. 
Code the message in accordance with the "International 
Weather Code for Ships.” 
4. At end of each voyage, remove all forms with completed ob¬ 
servations and mail in the postage-free envelopes provided. 
5. Radio transmission—Copy coded data for radio transmission 
from the unshaded numbered groups of columns. Each 
code group consists of five figures with a slant (/) indi¬ 
cating missing data. Omit code group 8 and 9 in message 
if no data are availble. 
TEMPERATURE 
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SEA 
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( —if air 
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(Degrees and tenths) 
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41 
REMARKS 
(Enter time of wind shifts, 
frontal passages, beginning 
and ending of precipita¬ 
tion, coded ice data, waves 
over 30/ 2 ft., etc.) 
42 
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