Hey Elcid thank so much!
I ran your the Arctan, and Magnification x 6 methods and recorded the results in the link below.
I found your first Arctan ranging method did not work for me and your Mag x 6 fell just short so I changed it to x7 instead and that worked great out to ranges up to 3,000m after that there is a degree of error that gets larger, the further away but that is not important anyhow as you would not be firing torpedoes at that range!
((Mast Height (m) / mils observed) x 7 (Mag) * 1,000) = Range (m) approximate)
See here for the video:
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The convoy lights are dead ahead
The merchantmen lay in their bed
The thump of diesels hammers down
In the oily sea-the killing ground
His knuckles white his eyes alight
He slams the hatch on the deadly night
A cunning fox in the chickens lair
A hound of hell and the devil dont care
-Iron Maiden
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