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Originally Posted by MudMarine
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Originally Posted by starvingartist507
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Originally Posted by Hitman
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Basically, this chart doesn’t use Sin curves at all. I just says that, if a=b, then AOB has to be 45deg, because we have a standard right triangle with two equal legs.
This chart asks you to figure out the values for (a) and (b), then simply shows you their ratio. If the ratio is 1:1, then the angle is 45deg. If the ratio is a little bit less, then the angle decreases by an equivalent amount. If the ratio is more, well it increases by the same amount. This is a very neat way to figure AOB, in my opinion.
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Thanks for your explanation  However, I *think* you do have to use the Sine at one point for doing it with an equation: The proportion 1:1 is only correct for the 45º angle, but if my thoughts are right, the rest of the angles will not follow a linear or aritmetical proportion (F.e. a proportion of 70% height vs. length is NOT 70º AOB but rather 45º) but instead a sine curve one:hmm: Am I right?
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Yes, thats true. The equation involves a trig function, so obviously the relationship would be a curve, silly me. 
Here's the equation that the card used. The Trebelle basically estimated the answers for this:
inverse Tangent of ( distance sub traveled / range difference). There are extenuating circumstances, but thats the basic idea. |
This is one good ole boy who sqeaked by with Algebra 1. I am gona have ta take a trig course for dummies. This here might just get me edjamacaded. Harder ta shot a torpedo than shooten a dang rifle. I guess the same principles apply windage, elevation and lead on a moving target. A whole new world this Boat sim.
My hats of ta Annapolis graduates. That dang shinny ring means somethin. It got me lookin at a circular slide rule and I built one from;
Build your own slide rule
http://www.sphere.bc.ca/test/build.html
Just takes time ta sink into this thick Jarheads head. That brain housing a bit rusty.
It's no longer just bein a hat rack. I feel a head aches a comin on just thinkin about trig.  |
That was close. I thought you were going to link to the thread-that-shall-not-be-linked-to.
If you are serious, though, go ahead and get Hitmans backside to the Submarine Attack Course Finder/IS-WAS-WILLBEAGAIN. Then read either the instructions in the TTSNBLT, or to the document at HNSA that describes how to use it. You will find it more intuitive and less 'mathy' than a plain slide rule, although I use a small pocket slide rule for occasions when playing might be seen as non-productive, if you get my drift.