Omnimeter

[Gino]

By popular demand...

Now you only have to figure out how the thing works...





















Have fun...

[arnahud2]

Hi, what a nice steel tool, impressive

[Buddahaid]

I think I read how a shot was screwed up by reading off the wrong periscope power scale, and here is the very scale to ponder. Thanks for the pictures.

Most cool Gino.

I'd say it works like the stadimeter. Pick masthead height, count the number of divisions (in either x1,5 or x6 scope) and slide - then read off the distance on the right side of the scale - Simple and fast.

is there ANY possibility that you can put that thing into a high-res (or even low-res) scanner and provide the scanned image to us?

[Gino]

Originally Posted by Mav87th

Most cool Gino.

I'd say it works like the stadimeter. Pick masthead height, count the number of divisions (in either x1,5 or x6 scope) and slide - then read off the distance on the right side of the scale - Simple and fast.

is there ANY possibility that you can put that thing into a high-res (or even low-res) scanner and provide the scanned image to us?

I'm working on that. The president of the USS Cod Submarine Memorial is recovering from surgery. He has the Omnimeter at home. I will contact him this weekend to see how he's doing, and I'll tell him about your request. Please have patience, the answer may take a little time...

Groetjes,

[tomoose]

Gino;
thanks for that.
regards,
Tomoose

[Gino]

Something more about 'the tool'. It's quite heavy, but the sliders go really smooth. Mind that this is a handmade tool. The quality of the craftsmanship is beyond anything you can get nowadays.
How do I know that it's handmade, check out one of the pictures. The craftsman made a mistake... instead of 10,000 he first made 9...
It's also made for the boat that's named on it. Every boat built by Electric boat Co received (amongst other things) one of these.
E-boat Co also gave the submarine a number of playing cards. These were especially made for submarines. The red Hearts and Diamonds were printed in a different way. We are currently searching for the design of the back of these cards, so we can reproduce them.

Anybody here that can help us?

groetjes,

[Admiral8Q]

Originally Posted by Gino

By popular demand...

Now you only have to figure out how the thing works...

Have fun...

Really cool device! I wonder if it could be added to the game as a "dial" on the overlay such as the stopwatch?

[Gino]

Originally Posted by Admiral8Q

Really cool device! I wonder if it could be added to the game as a "dial" on the overlay such as the stopwatch?

Now...what a great idea... I think you'll notice that some people are already working on something.

As for the device: I only know of it's existence, I held it in my hands once, and I have an idea of how it works ( I also know the source to go to if I don't...)

Groetjes,

[Gino]

OK,

so I have some more pictures. Although htey're not what you wanted, but I have some good news.

Somewhere this week I should receive scans/photos made from the front.
For this the Omnimeter that we have has to be disassembled.





Groetjes,

[tomoose]

Gino;
appreciate your efforts. Can't you just remove the two 'knobs' and lay the whole thing down in a scanner?
I'm not sure if it will be too reflective given the shiny surface. Good luck with that. I've got my little html application standing by and if the scan works then it should just be a simple cut and paste into the application.

[Hitman]

Hello,

how the omnimeter works is very easily, and can be used as substitute for a broken split prism stadimeter by using the marks in the scopes (At 6x zoom 1 big mark= 1 degree). You simply drag the sliding part and place estimated mast heigth opposite the measured numbers of marks in the scope at high or low power (thus the double scale) and read in the distance scale the resulting distance to target opposite the same mark but in the range scale. The Sine scale on the right allows doing the same with hull length instead of mast heigth, and the sine scale serves for correcting for the shortened hull size when the target is angled.

[tomoose]

I've briefly tested my 'virtual' omnimeter by comparing my TDC data with what the omnimeter shows.
Allowing for the discrepancies caused by the fuzzy graduations on the virtual omnimeter it actually seems to work!
Here's what I tried;
1. Get mast height from ID book then slide this figure on the omnimeter. (pause game, alt-tab to my virtual omnimeter slide rule on desktop etc).
2. Get range to target using TDC and stadimeter.
3. Check scope graduation indicated on omnimeter by the combination of the mast height and range data.
4. Check on periscope (high power) to see if marks on periscope match what omnimeter tells me (i.e. omnimeter indicates 2 1/2 graduations on high power on the scope should match the mast height in my scope picture). It seems to work better if the scope marks are set from the main deck to the mast top as opposed to from the surface of the water to the mast top.

It seems to work albeit not exact. I've only used high power markings so far as low power doesn't give a good clear indication of the masts at distance (at least on my poor rig).
I haven't figured out what the angle on the bow slide is supposed to do as yet.

[Nisgeis]

Originally Posted by tomoose

I haven't figured out what the angle on the bow slide is supposed to do as yet.

It should convert the angular length of the target into an AoB, given the correct target length.

[tomoose]

So if I set the mast height on the one slide and it indicates (for the sake of an example) 2 on high power.
Then how is the AOB slide used?
Is the actual AOB lined up with the high power 2 mark? i.e. if the AOB is 70 then I slide the AOB slider to line the 70 up with...? There is a black arrow at the 90 AOB mark which I'm not sure about either.