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Originally Posted by CaptainNemo12
What do you mean not at 90 degrees? The ship looks like it's at perfectly 90 degrees from your point of view....
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nope, the ship is not at 90º AOB. Just look at the ID book, the shape of the bridge. Then look at the ship's bridge in the pic. The ship has a noticeable deviation from 90 deg. It's hard to say from the pic, but I'd say that the AoB is less than 90 deg (the ship is coming nearer the Uboat as it advances). I'd give it a 75º AoB. Maybe Dmitrius can tell me how wrong I am in my estimation (I'm still trying to learn manual shooting)
Dmitrius, I feel like slamming my head against a wall for not thinking about this one before
. It's so simple that it's beautiful!!!!. As I said before I'm trying to master the art of manual firing, and estimating speed in fast-shot setups has always been very complicated for me...however I don't understand those calculations very well. Let me see.
I measure the time the ship takes to travel it's own lenght on scope or Uzo. So far so good.
I get, say, 25 seconds for that same 78.5m ship.
78.5/25=3.14 meters/second.
I can do easily a translation of 3.14 m/s to KM/H (would be 3.14x3600/1000, result is around 11,3km/H), then translate the result to knots...(dividing by 1.8 would be enough for a rough number, result is around 6.1knots)
but...how do you change 3.14M/s directly to knots?...I'm a bit at loss here...
One further question, just in case you have the answer...for Uboat surface speeds what would be the correction factor?. Say, what about 4 knots?. And 6?.
I ask because I do a lot of attacks at 4 or higher knots if at periscope depth, just to be sure I am keeping the right depth during the attack...