Form Approved; Budget Bureau No. 41-R1258.4 
NAME OF VESSEL 
□ s/s 
□ M/V 
NAAfE 
OF CAPTAIN 
COUNTRY OF REGISTRY 
CALL SIGN 
V 
FROM 
O 
Y 
A 
MONTH 
BAROMETER NO. 
G 
E 
TO 
19 
WB form 615-5 
(1-64) 
U S. DEPARTMENT OF COMMERCE 
WEATHER BUREAU 
- t. 
SHIP’S WEATHER OBSERVATIONS 
> 
Check ( / ) 
TEMPERATURES (COLS. 16-18, 28-30, 32-33): 
□ "C 
□ ’f 
INSTRUCTIONS 
1. 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. 
2. Fill in the blanks on each page of the form. (Name of 
vessel, barometer number, etc.) 
3. 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.” 
A. 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. 
POSITION OF SHIP 
OCT- 
ANT 
(0-3. 
5-8; 
LATITUDE 
LONGI¬ 
TUDE 
(Degrees and tenths) 
TIME 
( Nearest 
hour 
00-23) 
(G.C.T.) 
TOTAL 
CLOUD 
AMT. 
( Coded) 
(0-9) 
WIND 
(True) 
(00-36) 
SPEED 
( True- 
knots) 
EST. 
□ 
MEAS 
□ 
VISI¬ 
BILITY 
( Coded) 
(90-99)\< 
WEATHER 
PRES¬ 
ENT 
(Coded ) 
00-99) 
PAST 
( Coded) 
(0-9) 
PRESSURE 
CORREC¬ 
TION 
BAROME¬ 
TER AS 
READ 
(in., mb., 
or mm.) 
DATE 
COMPARED 
BAROMETER 
CORRECTED 
(mb. ) 
4 CODED 
Sea Level 
(mb.) 
AIR 
TEMP. 
( Round¬ 
ed) 
TEMPERA¬ 
TURE 
DRY 
BULB 
WET 
BULB 
(Degrees 
and tenths) 
CLOUDS 
( Coded) 
3-HOUR 
PRESSURE 
TENDENCY 
u. -5 
TEMPERATURE 
SEA 
WATER 
DIFF- 
AIR-SEA 
( -if air 
colder 
than sea) 
(Degrees and tenths) 
DEW 
POINT 
(Whole 
degrees) 
DIFF. 
AIR- 
SEA 
( Coded) 
DEW 
POINT 
( Round¬ 
ed ) 
WAVES ( Make 2 entries if 2nd pattern observed) 
SEA 
o 
( 00 - 36 ) 
( Coded) 
x 
( Coded ) 
SWELL 
o 
(00-36) 
( Coded) 
x 
( Coded ) 
REMARKS 
(Enter time of wind shifts, 
frontal passages, beginning 
and ending of precipita¬ 
tion, coded ice data, waves 
over 301/2 ft., etc.) 
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