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02-01-21, 06:14 AM | #1 |
Torpedoman
Join Date: Dec 2010
Posts: 112
Downloads: 66
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UZO range estimating to target
Hello,
Does anybody know how to count tick marks in UZO (TWoS here) and calculate the range to target? I know how to do it with the scope, the formula is mast height/tick marks *100. If I am on the scope and using x6 magnification the formula is mast height*4/tick marks *100. But UZO is x7 magnification and tick mark values seems to be different. Thank you |
02-04-21, 08:24 AM | #2 |
Seaman
Join Date: Mar 2019
Location: Helsinki, Finland
Posts: 36
Downloads: 81
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The UZO markings in my experience are inaccurate. There is a good mod on this forum which improves upon this. It also changes UZO to 6x.
https://www.subsim.com/radioroom/sho...d.php?t=165408 Still even with that mod I find that it is easy to make mistakes with UZO range. Especially at night it becomes more challenging. The WO is good crosscheck to your calculations, as he gives the range to closest target when you ask. Then a good alternate are the crude values at what range a ship fills your UZO/periscope, so you can forget about the ticks. In TWOS there is a table for it, but here are some numbers. Not perfect, but you can test them to see how they hold up. 1. Position so that a ship's length fills the FOV of your UZO/PER. 2. Choose the closest ship length or interpolate. 3. Choose the correct column UZO/6x/1,5x. 4. Result is range in meters. Ship / length / UZO / 6x / 1,5x LINER / 220 / 2000 / 1800 / 500 LMER / 180 / 1600 / 1500 / 450 TANK / 160 / 1500 / 1200 / 400 MMER / 100 / 900 / 800 / 200 SMER / 75 / 700 / 600 / 120 BOAT / 25 / 200 / 160 / 40 If the ship aspect is outside AOB90, divide the above by this. AOB 60 1,13x ///// 45 1,42x ///// 30 2x Last edited by Storm501; 02-06-21 at 03:54 AM. Reason: multiply->divide width->length |
02-04-21, 08:41 AM | #3 | |
Grey Wolf
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Quote:
So 220 m target at a 90 AOB using the numbers above would be 2000 m away, if it were at 60 AOB taking up the same length in the UZO it would be closer (2000 x sin(60) = 1732). Unless you mean divide, in which case: AOB 60 —-> 1.15 AOB 45 —-> 1.41 AOB 30 —> 2
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02-04-21, 01:54 PM | #4 | |
Torpedoman
Join Date: Dec 2010
Posts: 112
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Quote:
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02-04-21, 02:48 PM | #5 | |
Grey Wolf
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Quote:
During the day, if I need range on the surface because I want to plot, I’ll move so the target’s mast tips are just showing and eyeball the range with the binos. A ship with mast tips showing is about 15-16 km away. This is enough to get course/speed of the target over time. Every 5 minutes, note whether it came closer or got further away, and change course to keep the masts the same size. Makes plotting this way easy. As for ranging at night with the UZO, here is where knowing the tick calibration would help. There was only a vertical line in the historical UZO, no ticks, but what they would do is estimate range by how much a target of x length filled the optics. Not exact by any means, but more than enough, since the shot was made with a low gyro angle anyway, making range irrelevant. So either finding the calibration of the ticks, or knowledge of the in-game FOV would allow you to do the same. I’m curious now, might take that as a to-do....
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Ask me anything about the Type VII or IX! One-Stop Targeting Shop: https://drive.google.com/drive/folde...WwBt-1vjW28JbO My YT Channel: https://www.youtube.com/channel/UCIJ...9FXbD3S2kgwdPQ |
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02-06-21, 03:28 AM | #6 |
Seaman
Join Date: Mar 2019
Location: Helsinki, Finland
Posts: 36
Downloads: 81
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@derstosstrupp
You are right, the range should be divided with those factors if the ship is not AOB90, as it fills less of the FOV compared to AOB90. |
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