OPNAV FORM 3U4-1 (9-64) 
0 10 7-7 14-4100 
DEPARTMENT OF THE NAVY 
SHIP WEATHER OBSERVATION SHEET 
uss_ 
AT 'PASSAGE FROM 
/ • 
DATE (GMT) J ■ ! ' 
TO _ 
l 
! 
TABLE I 
TIME 
(GMT) 
WINDS 
□ v' IF ESTIMATED 
VISI- 
BIL- 
ITY 
(Miles) 
WEATHER 
(Symbols) 
BAROMETER 
(Inches) 
TEMPERATURE 
(Degrees and tenths) 
CLOUDS 
SEA 
WATER 
TEMP. 
(Degrees 
and 
tenths) 
SEA WAVES 
SWELL WAVES 
Direction 
(T rue) 
Force 
(K nots) 
Dry 
Bui b 
Wet 
Bulb 
Amount 
(Tenths) 
He i ght 
Type 
Direction 
(True) 
Period 
(Seconds) 
Hei ght 
( Feet) 
D irect i on 
(True) 
Period 
(Seconds) 
- 1 
Height 
(Feet) 
00 
/fo 
n 
/ 
— /- - 
/<P 
CL 
1 - * 
/ <5 
& O 
> / 
/> £ 
/So 
— 
/ 
XZe 
--j 
--, 
01 
02 
03 
04 
,1 . . 
05 
06 
07 
08 
f ) 
- 1* 
‘ J / 
) 
/ /' A»\ 
u 
5 / L/ 
j/ 0 
Os 0 
09 
10 
11 
12 
030 
/o 
/O 
r/jt 
-20'} Z 
70 
/ 
A* m 
/ 
2 SJrJ 
fl c. 
u 
4? O J> 
_ 
X 
Oc 0 
2 
3 
13 
//L 
14 
15 
16 
nos" 
7 Z- 
/ 0 , 
7 / 
c * 
0" . 
PS oc 
CO 
<L>S 
d3<P 
7 
3 
4 ? 
17 
- 
18 
19 
20 
ao# 
/O 
LL& 
O* <9 & 
X <? 
/ / 
(p 6> 
Xi 
6^ 
- 
—— 
<0/0 
— 
7 
a to 
21 
r 
I ! 
22 
23 
TABLE II 
SYNOPTIC OBSERVATIONS 
FIRST GROUP 
OF 
MESSAGE 
Day 
of 
Week 
0-7) 
(GMT) 
POSITION OF SHIP 
TIME 
(GMT) 
T ota 1 
Cloud 
Amt. 
(Coded) 
WIND 
Visi¬ 
bil¬ 
ity 
(90-99) 
WEATHER 
PRESSURE 
AIR 
TEMP. 
(°C) 
CLOUDS 
Course of Ship (0-9) 
Speed of Ship (0-9) 
3-HOUR 
PRESSURE 
TENDENCY 
SIGNIFICANT 
CLOUD 
Oc¬ 
tant 
(0-3) 
(5-8) 
Latitude 
(Degrees 
and 
tenths) 
Longitude 
(Degrees 
and 
tenths) 
Direction 
(True) 
(00-36) 
Speed 
(True) 
(K not s) 
Present 
(00-99) 
Past 
(0-9) 
Barometer 
Corrected 
(Mb) 
. . -O 
0 § 
1 u 
° * 
E 0 
< -1 
u 
7> 
2s. cT 
-0 
v*. 3 
0 _2 
Jc u 
* 
0 0 
X _l 
u 
"0 
0 — 
Cl. O 
X 
u 
O 
2L <7 
3s 
U 
\n 
fc 
u 
0 
0 CO 
5s 
1 /) 
C 
O 4 > 
c S'-w 
§ CD c 
0 a 0 
< u 3 
w_ 
O 
O 
U 
“O 
c 
C 
=> -C 
O cn 
45 
4> 
Q- 
X 
h- 
He i ght 
1 
2 ‘ 
3 
4 
5 
6 
7 
8 
9 
10 
11 
12 
13 
14 
15 
16 
17 
18 
19 
20 
21 
22 
23 
24 
25 
26 
L 
27 
:_| 
Y 
Q 
L L L 
3 ^ a 
L L L 
OOO 
GG 
N 
dd 
ff 
VV 
ww 
w 
PPP 
TT 
N h 
c L 
h 
Cm 
c H 
D 
S 
V 
S 
a 
PP 
8 
N 
S 
c 
K h 1 
s s 
SHIP 
00 
_ 
8 
_ 
SHIP 
06 
8 
SHIP 
12 
8 
SHIP 
18 
8 
1 
Indicator 
AIR- 
SEA 
DIFF. 
(Coded) 
DEW 
POINT 
(°C) 
SEA WAVES 
SWELL WAVES 
ICE ACCRETION 
SEA ICE 
Indicator 
Direction 
(Coded) 
Period 
(Coded) 
Height 
(Coded) 
Indicator 
Direction 
(Coded) 
Period 
(Coded) 
Height 
(Coded) 
Indicator 
Source 
Thickness 
Rate 
Ind icator 
Kind 
Effect 
Bearing 
Distance 
Orientation 
28 
29 
30 
31 
32 
33 
34 
35 
36 
37 
38 
39 
40 
41 
42 
43 
44 
45 
46 
47 
48 
0 
T s T s 
T d T d 
1 
d d 
W W 
P 
W 
H 
W 
1 
d d 
W W 
P 
W 
H 
W 
2 
1 
S 
E s E s 
R s 
ICE 
c 2 
K 
D, 
r 
e 
0 
1 
1 
2 
ICE 
0 
1 
1 
2 
ICE 
0 
1 
1 
2 
ICE 
0 
1 
1 
2 
ICE 
DO NOT TRANSMIT 
Dry Bulb 
(Degrees 
and tenths) 
Wet Bulb 
(Degrees 
and tenths) 
Sea Water 
Temp. 
(Degrees 
and tenths) 
A 1 
a 2 
A 3 
Celsius 
Cels ius 
Celsius 
1 
REMARKS 
EXAMINED 
USN, NAVIGATOR 
