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Originally Posted by dc1962
Can you use the periscope’s recital pattern like you would in a modern set of binos with the mil divisions to gain distance? If so how?
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I made some tables that let you convert the periscope's reticle pattern into a distance for ships. If you're interested, they can be found here:
http://webpages.charter.net/sawdust/sh3/sh3.html
As for speed, I use the method where you mark a ship's position on the map at two points...a fixed amount of time between them. If you mark the distance (in kilometers) covered by a ship in 3 minutes and 14 seconds, then multiply by 10 and you have a speed in knots. Or, to save time, measure the distance covered by a ship in 1:37 (half of 3:14), and then double the result from above.
The most famous site for good manual targetting is Wazoo's page:
http://www.paulwasserman.net/SHIII/