SUBSIM Radio Room Forums - View Single Post - if there was a new GWX RPM chart, would you use it for hydrophone hunting?

greyrider · 02-28-07, 10:24 PM

from the "Submarine Torpedo Fire Control Manual"
http://hnsa.org/doc/attack/index.htm#chap08

804. SPEED DETERMINATION:
(a) The Fire Control Party must utilize every means at their disposal to determine target speed. The following means are available:
(1) TDC: This method is described in OP1442A.

(2) PLOT: This method is described in detail in Chapter 5.

(3) TURN COUNT: The Approach Officer should have available for ready reference the most complete set of curves that he can obtain of different types and classes of enemy vessels.
Their use will furnish a means of approximating the speed of an observed target.

end reference to manual

sailor steve was right when he said that it was quickly dropped in the begining, but for what reasons? i dont know all the reasons, but i can guess at some, torpedo failures, inexperience of crews, green crews,but the one thing that
stands out above all others was the lack of japanese radar.
we have proved in sh3 that the u s navies prewar doctrine was correct.

this link goes to HNSA-Historic Naval Sound and Video

http://www.hnsa.org/sound/sonobuoy2/record4.mov
this is a link to a sonobouy training record of estimating a subs speed by rpm.

02-28-07, 10:24 PM	#29
greyrider Watch Officer Join Date: Apr 2005 Location: massachusetts Posts: 334 Downloads: 237 Uploads: 0	from the "Submarine Torpedo Fire Control Manual" http://hnsa.org/doc/attack/index.htm#chap08 804. SPEED DETERMINATION: (a) The Fire Control Party must utilize every means at their disposal to determine target speed. The following means are available: (1) TDC: This method is described in OP1442A. (2) PLOT: This method is described in detail in Chapter 5. (3) TURN COUNT: The Approach Officer should have available for ready reference the most complete set of curves that he can obtain of different types and classes of enemy vessels. Their use will furnish a means of approximating the speed of an observed target. end reference to manual sailor steve was right when he said that it was quickly dropped in the begining, but for what reasons? i dont know all the reasons, but i can guess at some, torpedo failures, inexperience of crews, green crews,but the one thing that stands out above all others was the lack of japanese radar. we have proved in sh3 that the u s navies prewar doctrine was correct. this link goes to HNSA-Historic Naval Sound and Video http://www.hnsa.org/sound/sonobuoy2/record4.mov this is a link to a sonobouy training record of estimating a subs speed by rpm. __________________ Her gun crew had guts, however, for from her canting bow came a half dozen well-aimed rounds. How they pointed and trained their gun on that tilting platform will long remain a wonder, and their dedication in keeping up the fire until they went under would be a matter of pride to any nation. O'Kane, Richard. Clear the Bridge!: The War Patrols of the U.S.S. Tang