Xe Check List of Data Necessary for 
Complete Reduction 
In general - 
For each 
1. Ship's navigation. 
Ze) chip's) Logie 
5- Miscellaneous cata not appearing in ship's log 
such as distance and azimuth when shooting ship 
is abeam at beginning and end of reversed profile, 
time shooting ship is abeam, and propeller revolutions 
at time of each shot when no pit log or taffrail 
log is available. 
4. Lathythermograph observations. 
shot - 
1. Charge size and fuse length. 
2e Time of day the charge was thrown over the side. 
Se Amount of time charge was over the side before 
detonation. 
4. Depth of water under shot. (Also indicate shot 
on fathometer tape.) 
5e Pit log speed and mileage. 
