12 
REPORTING 
PROCEDURE 
OCEANOGRAPHIC LOG SHEET - B 
PR NC—NHO-1384 
The BT log sheet (OPNav-25T-1189 new) is shown 
in facsimile below. All the information desired is im- 
portant in interpreting the BT trace and the sonar 
conditions. It should be furnished with great care. 
For each lowering, the log sheet should be filled in 
as follows: 
Ship’s name, month, and year. Enter ship’s name, 
month, and year in the spaces at the top of each 
sheet. Use Greenwich Mean Time throughout, unless 
special conditions require otherwise. In any case, in- 
dicate the kind of time used in the time zone space. 
Serial No. Use here the slide serial number as de- 
scribed in (1) above. 
Time. The Greenwich MeanTime, hour and minute, 
at which the BT entered the water. 
Date. The Greenwich date. 
Latitude and longitude. Enter here the ship’s posi- 
tion in degrees and minutes at the time the BT entered 
the water. Be sure to indicate whether North or South 
latitude and East or West longitude. To obtain these 
positions accurately requires close coordination with 
HYDROGRAPHIC OFFICE 
+ PUB. MO, 606-¢ 
UDE | LONGITUDE 
INETIALS 
a 
f& 
> 
= 
rs 
a 
a 
‘x U. S. GOVERNMENT PRINTING OFFICE : 1952 O—214347 
