Quote:
Originally Posted by Catfish
Hello,
thanks for the heads-up - already installed.
Few questions for Karamazovnew :
1. I do not see any green lines or units horizontally: not at the horizontal center of the 'scope, and not at the upper part ? But i can count it anyway via the diagonal small "echelons", if not that exact ...
2. Page 8 of the KiUB user guide: when getting the speed - now what you show is how the ship goes by at an AOB of appx. 90, but how do you measure the speed if the AOB is, say 45 ? The ship's length is then shortened and the method with the stop watch will then surely show a wrong speed ?
3. Page 9 of the KiUB user guide you put the measured 44 seconds of the middle ring at 151 meters as you write, while the length of the warship should be 251 ? Typo, or how do you find this 151 ? The photo again shows 251 ...
In that respect - i just measured a target getting by, and used 1 minute 24 seconds - how do i enter this in the AOBF ?
The scale goes up to 100, so i would have to enter "84" (seconds), ok - but what about more than 100 seconds measured time ?
Thanks and greetings,
Catfish
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1. If you mean the ones on the AOBF, the marks are just below the center line. I found them easier to read if they were like this. But you can move them up by editing the alpha channel in AP_PreciseMarks.tga.
3. I've made the guide during Alpha 3.0. Since then I've changed the AOBF, but the principle is the same. You align the length on the outer circle with the time on the middle outer circle and read the speed on the inner middle circle just below the red line. The AOBF is a circular slide ruler that does a division between the outermost circles and shows the answer on the marks circle, in the place indicated by the red line.
So, if Speed[Kts]=Distance[m]/Time[s].... then Speed[kts]=Distance[m]*0.5/Time[s]*0.5
In other words, if a target that is 160 meters long passes in 160 seconds (1. in the picture), it will have the same speed as a ship 80 meters long passing in 80 seconds (2. in the picture). So just divide both the time and length by 2, or by 10, the speed will be correct. But you'll raaarely need to do this.
2. The fixed wire method works at any AOB/Bearing. When the sub is standing still and you don't move the scope, the vertical center line becomes like an imaginary "start/finish" line
projected on the water.
.
The time doesn't change, regardless of AOB. The only thing that changes is the Angular movement of the ship during that time. The closer the AOB is to 90, the bigger the angular movement during that time. That's why it
seems to move faster. And of course, the width of the ship becomes a problem at low AOB's as you won't be able to figure out where the stern ends.
Now, If your sub is moving, the projected vertical line moves with your sub. So the only way to take accurate measurements is to point your sub directly before your target and use the 000 bearing as a projected line. As the sub moves forward, the line gets shorter but doesn't move.