GUIDE: Easy and Fast Speed Estimation
 

Hello. This is another Method to estimate Target speed fairly accurate and quickly without to much math or special tools. All you need is a pocket calculator or use your brain if youre good at mental arithmetic.


here we go:






1. Identify the vessel.

you dont even need range or AoB now. We are going to grab the speed first. Just make sure AoB is somewhere between 50 and 140

2. Catch the Time your target needs to pass the center line of the optics in seconds.

just place the center line in front of the ship and start the watch when the bow touchs the line. Get the time when the stern has passed the line.

3. Devide the "magic" number from the table below by the time you have catched.

round it and you have your speed in knots. Now complete your firing solution with range and AoB.

The List






Battleships:

Fuso 418
Kongo 426
Ise 435
Yamato 520

Carrier:

Hiryu Fleet Carrier 444
Shokaku Fleet carrier 510
Akitsu Eskort Carrier 295
Chitose Seaplane Tender 362
Taiyo Escort Carrier 351

Cruiser

Maya Heavy Cruiser 398
Mogami Heavy Cruiser 388
Takao Heavy Cruiser 398
Agano Light Cruiser 333
Kuma Light Cruiser 315
Naka Light Cruiser 315

Destroyer

Akizuki Destroyer 259
Asashio Destroyer 231
Fubuki Destroyer 231
Minekaze Destroyer 194
Mutsuki Destroyer 194
Shiratsuyu Destroyer 204

Other Warships

Large Minelayer 240
Minesweaper 139
Medium Gunboat 111
Small Gunboat 93
Subchaser 128

Troop Carriers

Huge European Liner 343
Large Old Passenger Carrier 267
Modern Passenger Lliner 260
Small Passenger Carrier 152

Tankers

Large Modern Tanker 300
Medium Old Tanker 204
Small Old Tanker 151

Merchants

Large Modern Composite 273
Large Old Split Freighter 269
Medium European Composite 237
Medium Modern Composite 204
Medium Modern Split Freighter 218
Medium Old Composit Freighter 207
Medium Old Split Freighter 238
Small Modern Composite Freighter 159
Small Old Split Freighter 169

This method is fairly accurate at AoB between 50 and 140 with an error less then 0.5 knots. You will have best results at AoB 75-105. Outside of 50-140 range the error develops rapidly. Ive tested the numbers for each ship. It works for any range at any speed.
Note The higher the speed though the higher the error, it becomes important at speeds of 30+ knots.
Note The slower the target the longer it takes to catch the time. Merchants traveling at 5 knots should take about 40 seconds to pass the optics.
Note Your own speed must be zero or close to that. The faster you move the less accurate is the solution. You can move when your solution is ready. Position Keeper should take your speed in account.
Note before you activate the Position keeper you should complete the solution. If you start position keeper first, it might spoil your solution a little bit since the speed is going into calculation from beginning now.
Hint While the vessel is passing the optics you can use the time to set up the torpedos


My idea was first to put the numbers into recognition book together with other important information and release it as a mod. But i have no clue how the recognition manual is put together so maybe a skilled modder can do that. Feel free to do so id love it.

Another good idea would be to release the list as fine printready PDF. I dont have any PDF Software on my machine at the moment. If someone has such tools, make us happy.

Good Hunting.

bump

Not had chance to try this. Will do later. Thanks Werner, looks interesting. :D

Just tried this on the torpedo sub school. Accurately got the speed of the cruiser (8.8) rounded up to 9. Cheers, very useful. :up:

Nice list there. Saves us the trouble of finding the ships length and converting our timed results from feet/sec into knots.

bump

To make this a mod, you would need to place a wildcard entry for this number into the [G25] section of the menu_1024_768.ini so that it would appear in the recognition manual in a certain spot on each page for each boat. Then you would need to go to data/sea/data/.... open each boat folder and place that spefic boats "magic" number into each folder for each boat in the directory.

Here is my guess of what would go into the menu_1024_768.ini if we called the number "magic" but I am pretty much just winging this so verify these entries....

[G25 I53]
Name=Magic val
Type=1029;Static text
ItemID=0x25070009
ParentID=0x25070000
Pos= (I think this is a SH3 relic and not used in SHIV so you can probably leave blank for just fill in with junk coordinates x, x, x, x)
Zone= (experiment with the variable vectors to determine proper location of entry on boat page of recognition manual)
Color=0xFE
Font=19
Text=955
TextFlags=0x4

[G25 I54]
Name=Magic
Type=1029;Static text
ItemID=0x25070010
ParentID=0x25070000
Pos=(not used in SHIV)
Zone= (experiment with vectors here for entry placement on boat recognition page in manual)
Color=0xFE
Font=19
Text=(not sure what goes here)
TextFlags=0x6

If I knew how to edit the menu_1024_768.ini, I would be happy to do it but I fear I don't know much more about it than what I have put in this post. If I find out more, I will certainly pass it your way. Should be a fairly easy mod to an experienced user.

I just bought this game 2 days ago so I'm still a noob.

There is a tutorial on editing the menu_1024_768.ini but I don't have the time to read it yet. here is the link...http://www.subsim.com/radioroom/showthread.php?t=111832

good luck.

Here you are:

http://www.megaupload.com/nl/?d=Y5GXNZCN

thank you for pointing me into right direction. ill try to manage this later during the day.

Great 'magic numbers' werner, any chance of doing something similar for SHIII or even releasing your 'magic number' formulae ???
I am seriously looking at trying to mod the SH4 recog manual to include not only the 'magic numbers' but also the AoB Aspect Ratio done by Hitman.
I have done some work on the SHIII manual with aspect ratio but would also like to do your magic number thing !

ttt
That would be great!

WernerSobe, get the free version of Adobe8 for PDF. You can also buy it to make PDF documents if you so wish. Or you can write it up in a Wordpad or Rich Text Document.

Nice list you've done and thanks. :up:

Thanks too ReM for the PDF. :up:

I use PrimPDF (freeware) to convert Word and Editor docs to pdf format. Does a great job, is quick and FREE. Stick PrimoPDF into google or similar for site link.

Here's another Free PDF solution;
It's called "freepdf" oddly enough :D
After installing the program you can print ANYTHING to a pdf file. Just pick any document, picture etc and print it, in your list of installed printers will be freepdf. Simply choose it for your printer and viola, a pdf file is generated.

You need to dl 2 components to make it work, freepdf and ghostscript. There's a link on the site to dl G.S.

We all use this where I work, highly recomended! :up:

http://freepdfxp.de/fpxp.htm