Subsim Video: New Manual TDC Video in HD (2/13/10)

[Onkel Neal]

Very accurate description, but how about some illustrations?

Originally Posted by Frederf

karamazovnew is mostly right, AOB 120 and AOB 30 shots from the same side are very similar but not exactly the same. For a short range shot these solutions are very close. They get farther away in range, the more they are different.

It is easiest to imagine the difference this way. Imagine two ships right on top of each other, range 4000m, bearing 45°, speed 10 kts. Ship A has a heading in such a way that it's AOB is 030° while Ship B has a heading which makes its AOB 120°.

Say you have a really fast torpedo such that both torpedo runs take the same amount of time to get to the target. Call this time some 2 minutes. Assuming that both torpedoes were launched at the same time and all periscope sightings were taken at the same place, do you think that the ships A and B still are in the same line after 2 minutes?

Ship A should be ahead of Ship B visually as it has crossed more bearing angles since it has drawn closer to the observing sub. Its rate of bearing line crossing has gotten faster the closer it's gotten for two reasons. One, it's closer so the bearing lines are more closely spaced. Two, the AOB has gotten closer to 90° as it passes in front of the submarine. Ship B has done just the opposite, crossing fewer bearing lines per unit time and has shrunk its AOB getting closer and closer to 180 as it sails toward the horizon.

There are secondary effects to the equations like the fact that torpedoes have reach out of the tube and their gyro angle and their eventual destination's bearing are different because of this reach. Also the finite speed of the torpedo means that the travel time of the torpedo to Ship A is shorter than to Ship B and thus can cancel out the primary effect mentioned in the above paragraph partially, exactly, or can exceed it depending on the speeds and ranges involved.



A idea, C+ execution. I want SH5 to be a "captain simulator" but not like this. Make no mistake; this is just a reworked SH3 notepad skin deep. TDC control wasn't the XO's job or the CO's job it was the plotting party's job! It's a team effort! This video doesn't show a team effort, it shows a blank-faced robot waiting to accept magic numbers from the CO in the form of a screwed up Madlib. Where are the angular rate tables or hydrophone prop counts? Why can't you should out a dozen sightings over the course of minutes and have the plotter...ya know, actually plot to figure out speed and course?

What's the crap with the magic numbers jumping on the dialog box as the CO merrily spins the periscope like a top across 10 different targets? WTF!?!?



This was easily observable in SH4. Even fractional speeds were possible even though the voice files only said integers. I have confirmed that you can get down to at least 0.2 knot resolution by checking the resulting RPM by clicking on various parts of the dial between whole number knot settings. The same is also true for the SH4 TDC as you can watch the torpedo line smoothly change based on things like target speed in the F6 screen.

Personally I absolutely despise the absolute truckload of crap on the screen while in the periscope view. 99% of it is crap. The periscope is for looking and holding down a "give orders" key that can pop up some interface and that's it! In a real submarine there's not even a bearing readout on the glass!

I don't think the devs are lazy... I think they are inadequately insightful as to what an inspired design of this action would look like. Either this or they are fundamentally bound to poor direction/design by someone inadequately insightful. Given a chance I could design something infinitely better.