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So did stadimeter shots have such a high margin for error? Sounds like it. We dont have this
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What do you mean we don't have this? Of course there is a margin of error!
I may be wrong, but I think you are confusing something here.
The anglesolver will correctly solve for the
input you give, no matter what the angle is, and without regard to the means of gathering data, be it stadimeter or radar rangefinding.
The error arises because of
torpedo tube parallax. Somewhere in that document there is a clear description and diagram of this phenomenon. In straight fire the mathematics of triangles means that in most cases, even if your range is wrong by a big margin, you'll still hit.
If you have a perfect right-angled triangle set up with a 000 gyro angle on a tta of 90, then you do not need to input range at all and it will always hit the target so long as your speed solution was correct.
However, because you are making a curved shot, the torpedo correction (for torpedo reach and turning circle as well as the difference in position between the torpedo tube and the scope) is highly dependent on an accurate range.
If your range is inaccurate, then your torpedo shot will not hit the target as you'd hoped. The greater the bearing to target, the more this is the case.
The reason the manual states that curved shots with radar range are more accurate than with stadimeter is simply because radar raneg finding is much more accruate that stadimeter rangefinding.
Hitman had a nice diagram of the effect of torpedo tube parallax here:
http://www.subsim.com/radioroom/show...51&postcount=1