Range on TDC (imperial). Is it yards? How to convert?
 

I play Imperial measurements.

I ID a target and measure range with the stadimeter. What´s the number I get in the TDC? Is it in yards? Feet?

If I want to plot the target on the map (using NO auto map updates), how do I convert this Feet/yard number to NM?

Solve this example for me:
I ID a cruiser. I measure range to 2234 in the TDC. How many NM´s is this? What´s the multiplier?

I remember something about the ruler-tool being faulty in SH3. Something about, at the point on the map where number on the ruler changed from, let´s say, 1.0 NM to 1.1 NM it was actually 1.05 NM, and NOT 1.1 NM. Is this bug still in the game?

If you use imperial scale, you still get the stadimeter range in meters, game doesen't convert to yards. 2234 meters would be around 1.2 nautical miles (2443 yards).

you can use this converter program: http://www.squarerigged.nl/papa/dimen/conv.htm

Ooohh...that´s why things didn´t add up.

How about the ruler-bug. Does anyone know?

Yes, it's there allright.

its yards.

1nM = 2000 yards

Yeah... after the devs fix the tdc imperial problems. :yep:

Of course ist not exact but good enough. I can track a target manualy using this and i will be right +-100 yards. Thats good enough for a solution.

Are there several opinions about this? Is it yards or meters?

Seems to be metres.

Using the torpedo training exercise. Map contacts on, Imperial units on.

I've measured a range of 1350 to the cruiser, a sonar ping says 1370. Measuring on the Nav map, the range falls about half way between 0.7 and 0.8 nautical miles.

1370 metres is 0.74nm
1370 yards is 0.68nm

So metres seem to be the most accurate unit. Does explain why i often seem to missjudge target speeds on campaign though.

It is meters indeed. When you pinged cruiser, was your boat in periscope depth, and did you just previously measure the range with the stadimeter? Then the sonar gives you very close that range you have in the TDC. If you put the stadimeter on anything else exept the masthead then check the range for TDC and ask your sonar to ping for range, you'll see that he gives you almost exactly that range you intentionally measured wrong.

At least that's what I found when tested the ranges.

I wasn't disagreeing with you. It's the same system I use. ;)

It's just that the conversion from Metric to Imperial hasn't been fully implemented at the moment so we're gonna be a bit short of the mark until it's patched up.

I find that if you zoom ALL the way in, most decimal nm's will be marked by a small circle on the line your drawing. Those small circles look like they are placed correctly and you can then go by them. The range next to the line end changes when you extract the line, and seems to cover a larger "area" when it changes then just at the point.

i.e. it changes to 1.2 when over 1.15 and changes to 1.3 when over 1.25. So you could be 0.05 nm off to either side.

When using imperial measurement units:

the dial for range (top right of the screen) uses yards (as it says on the dial). The height of the enemy ship is measured in feet.

(with 1.2 patch) if you place the mouse over the displayed range in position keeper interface, a tooltip will apear telling you again that the range is measured in yards. So the range is always displayed in yards, as far as the TDC is concerned.

About the ruler-tool in the navigation map: it uses a single digit after the decimal separator so when the distance is 1.04 NM it would display 1.0 and when the distance is 1.06 NM it would display 1.1. The value of the nautical mile is an average, 1853.9948 meters. The value of the actual nautical mile is linked to the length of one degree of longitude which varies with latitude, but this is not easy to deal with, so an average is used. :know:

Unfortunately, Krupp has proven that the stadimeter and resulting range are worthless in Imperial scale. The data within the Japanese ships cfg and sim files are in metric which throws a wrench into the system when using imperial units. Apparently the game is not converting the measurements correctly.

I direct you to the following SH4 Mods thread JP Ship Dimension Fix and specifically to an illuminating discovery by Krupp in that thread.

Ah, so is this the reason why my torpedo attacks nearly always fail? I have set up numerous attacks on freighters sailing at 6 knots, had a good firing angle, good AoB, etc., yet WAY more often than not the torpedoes mysteriously miss time and time again (with the Mark 10 torpedoes). I've never really had a problem with manual firing solutions in SH3, so suffice it to say it's been quite frustrating seeing so many of my shots go astray in SH4.

I'm going to have to look into this fix and install it, until (hopefully) the devs fix the problem. Speaking of which, they are aware of this problem, correct?

From my experience, metric system is corrected with Krupp's mod, but it hosed for those wishing to use imperial system since the cfg file is in metric. No conversions taking place.

No, I don't think the devs are aware of this problem. :shifty:

The game's simulation runs internally using metric system, only the interface does the conversion to (and from) either imperial or metric units. You can see this when asking for depth under keel, if it's more than 1000 meters it says more than 3281 feet.

ugh. what a conundrum. I have everything in Imperial including all my settings, mods, calculation tables, etc. what a nightmare. If the game's internals and everything are based off metric system then Im going to switch to "the dark side" and go metric, only converting when I have to. Thanks for this info.

I did the following test, loading Torpedo Attack from Submarine school:

automatic targeting, metric system:
Mogami heavy cruiser, 34 meters mast (inside range dial), range 1510 meters (in both Position Keeper and Range dial on the top-right corner of the screen). I activated the position keeper and attack map displays the x right on the target.

automatic targeting, imperial system:
Mogami heavy cruiser, 110 feet mast (inside range dial), range 1678 yards (in both Position Keeper interface and Range dial on the top-right corner of the screen). I activated the position keeper and attack map displays the x right on the target.

The conclusion so far is that automatic targeting is working correctly, no matter the measurement units. The interface also seems to be working corectly.

Next:

manual targeting, metric system:
Mogami heavy cruiser, 34 meters mast (inside range dial), range 1489 meters from stadimeter (in both Position Keeper and Range dial on the top-right corner of the screen). I activated the position keeper and attack map displays the x right on the target.

manual targeting, imperial system:
Mogami heavy cruiser, 111.5 feet mast (inside range dial), range 1480 yards from stadimeter (in both Position Keeper interface and Range dial on the top-right corner of the screen). I activated the position keeper and attack map displays the x NOT right on the target, but closer to the sub.

So, since the simulation runs in meters and the interface always converts units to metric or imperial, the stadimeter (as a part of simulation) does not always compute range (internally) only in meters so the range gets doubled (cascaded) conversion. :damn:

The Ubisoft's QA has no clue of how to play this game. This should not have escaped them.

The workaround would be, when using stadimeter, when lowering the "level" don't stop when the bottom of the "ghost" reaches the top of the ship, instead go down more, to 90% of the height the ship, so you introduce the ratio 1y/1m in the stadimeter formula and kill the double cascaded conversion.

This must be fixed in 1.3!

Also I noticed same thing as you mention, that when you use stadimeter and send the range to the TDC, then sonar always give you same range. Thats some bug.