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I'm goin' down · 04-24-11, 04:56 PM

I do not want to use the 3 minute rule. Plus, I am playing OM and using meters to calculate distances. I found this online, posted by our very own donreed1. I want to calculate speed by timing the target as it passes the perpendicular line on the scope. Will it work?

Ship's length past the vertical graticule / seconds x (3600/1852) = speed.

The bearing to your submarine from the targeted ship, your AOB, must be between 60 and 120 degrees. You should be at full stop for best results.

don1reed provided a quick example: i.e., T2 = 152.7m / 40 sec. x 1.94 = 7.4 kts.

Is this acciurate? Why 3600/1852?

04-24-11, 04:56 PM	#1
I'm goin' down Ocean Warrior Join Date: Sep 2008 Location: Notify command we have entered the Grass Sea Posts: 2,822 Downloads: 813 Uploads: 0	cacluating ship speed manually I do not want to use the 3 minute rule. Plus, I am playing OM and using meters to calculate distances. I found this online, posted by our very own donreed1. I want to calculate speed by timing the target as it passes the perpendicular line on the scope. Will it work? Ship's length past the vertical graticule / seconds x (3600/1852) = speed. The bearing to your submarine from the targeted ship, your AOB, must be between 60 and 120 degrees. You should be at full stop for best results. don1reed provided a quick example: i.e., T2 = 152.7m / 40 sec. x 1.94 = 7.4 kts. Is this acciurate? Why 3600/1852? Last edited by I'm goin' down; 04-24-11 at 09:55 PM.