[TorpX]

Originally Posted by Dorjun Driver

I didn't make myself clear. What I meant is that when the target takes an unexpected zig or zag at the last moment, given she maintains her speed, all that’s required is to plug in the new intercept angle given her new course. From that—and maybe a little stick and rudder work—the deflection/lead angle then drops into your lap. With seconds to spare, too!

Yes, if all you want at the last minute is the lead angle, you can simply change the track angle and recalculate (either in the program or manually). But, there are practical and RL considerations. If in case 1, the target ship takes a last minute zig, you will quite possibly be faced with a situation of either, "the target got by" (it has already gone past the new firing bearing), or the new track angle will be much less favorable (as well as the range being longer). In RL, it took an appreciable amount of time to calculate a firing solution without the TDC. It also takes some time to change course in a submerged submarine. The difficulty of quickly computing firing solutions, while making an approach on a zigging target lead the Navy to develop the the TDC.

From Dignan:

Any way you can make this an iphone app?

I don't own an iphone or any such device. I would think someone who knows how to make apps for these could do it without too much trouble.

Heretofore, I used my TI-85 for this sort of thing, but the display is very small and it's hard to see well in a dark room. Otherwise, it works very well, so I don't see why an i-phone couldn't handle it.

I was wondering whether anyone could run this on a tablet computer.