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ETR3(SS) · 01-08-11, 01:05 AM

Just thought that I'd throw this in here. You cannot get a targets speed just by prop counting. While this does give you the shaft rpm of the target vessel, you still need to know what type of vessel it is. Knowing this, there should a know turns per knot (TPK) for that vessel. Once you have that information then you can make a speed estimate with sonar.

01-08-11, 01:05 AM	#3
ETR3(SS) Ocean Warrior Join Date: Dec 2007 Location: Between test depth and periscope depth Posts: 3,021 Downloads: 175 Uploads: 16	Just thought that I'd throw this in here. You cannot get a targets speed just by prop counting. While this does give you the shaft rpm of the target vessel, you still need to know what type of vessel it is. Knowing this, there should a know turns per knot (TPK) for that vessel. Once you have that information then you can make a speed estimate with sonar. __________________ USS Kentucky SSBN 737 (G) Comms Div 2003-2006 Qualified 19 November 03 Yes I was really on a submarine.