EASY speed calulation

mountainbikextremist · 03-01-09, 11:31 PM

1. Mark ship position on map, and start timing for 30 seconds.
2. Mark ship position on map after 30 seconds
3. Measure distance between two points in yards
4. Multiply that number by .06 to get your speed in Knots

Example:
Ship traveled 150 yards in 30 seconds
150 x .06= 9 Knots

Simple as that, and it is pretty damn accurate. I just sunk 2 large passenger ships using this technique "3 torps each" consecutively and all 6 fish hit home. Using this mod: http://www.subsim.com/radioroom/showthread.php?t=111371, I pinged both ships, and manually inputted their ranges into the TDC. I guesstimated their AOB and sent both to the bottom. That's pretty damn impressive for me since I have just started using manual targeting. I just have to keep a calculator by the computer

Fish40 · 03-02-09, 10:30 AM

Seems like a good tip

Looks as though you don't need to identify the target useing this method. I haven't had any luck getting precise range measurements useing radar, since as far as I know, there is no numerical readout of range. There is a mod out there that addresses this, but I don't think it was made RFB compatable yet. IRL, there was indeed such a readout.

I've also used the sonar ping method, but also found that faulty on occasion. The way I do it is time how long the ship takes to cross the 0 bearing line of the scope, and calculate speed useing the ship's length. There are lists out there which provide the lengths of in game ships. Of course you need to ID the ship, a challange to say the least on a pitch dark night, but it works like a charm

03-02-09, 11:13 AM

further down the thread in post #12 you will see a different version of the same fix that works much better than how otto shows it.

mountainbikextremist · 03-02-09, 12:26 PM

Do know what the name of the mod that corrects the range issue is?

Quote:

Originally Posted by Fish40

Seems like a good tip

Looks as though you don't need to identify the target useing this method. I haven't had any luck getting precise range measurements useing radar, since as far as I know, there is no numerical readout of range. There is a mod out there that addresses this, but I don't think it was made RFB compatable yet. IRL, there was indeed such a readout.

I've also used the sonar ping method, but also found that faulty on occasion. The way I do it is time how long the ship takes to cross the 0 bearing line of the scope, and calculate speed useing the ship's length. There are lists out there which provide the lengths of in game ships. Of course you need to ID the ship, a challange to say the least on a pitch dark night, but it works like a charm

Fish40 · 03-02-09, 02:16 PM

Here's the thread, and included link: http://www.subsim.com/radioroom/show...ht=range+rings

Rockin Robbins · 03-02-09, 09:04 PM

Why would you multiply by .06 and call that easy? Why not mark two positions three minutes apart and measure the number of hundred yards. 850 yards equals 8.5 knots. THAT's what's easy. Multiplying by .06 is not.

Armistead · 03-02-09, 10:29 PM

I'm just trying to find the perfect way without contacts on to mark without pinging....Still time the passing of the ship through the crosshairs and checking my book....or leave it to the stad. Would rather have it down before they get that close.

mountainbikextremist · 03-03-09, 12:21 AM

I am impatient and dont like having to wait 3 minutes to get my speed. 30 seconds is much faster

Quote:

Originally Posted by Rockin Robbins

Why would you multiply by .06 and call that easy? Why not mark two positions three minutes apart and measure the number of hundred yards. 850 yards equals 8.5 knots. THAT's what's easy. Multiplying by .06 is not.

mountainbikextremist · 03-03-09, 12:26 AM

One of these days when I have some time, I am going to figure out how to get range w/o pinging as well. I just need to dedicate some time to sit down, do some searching for different techniques, and actually read them through them all the way. I would like to figure out the mast height to calculate range, and ship length for speed, as well as a good way to accurately calculate the AOB. One step at a time....I'm definitely making progress

Fish40 · 03-03-09, 04:54 AM

Quote:

Originally Posted by Armistead

I'm just trying to find the perfect way without contacts on to mark without pinging....Still time the passing of the ship through the crosshairs and checking my book....or leave it to the stad. Would rather have it down before they get that close.

It takes alittle practice, but with time you'll be able to ID targets in plenty of time. The first thing I look for is the position of the funnel. A funnel that is more or less in the center of the ship is a freighter. Tankers have their funnel aft. A sound check will tell you if you're dealing with a merchant or warship way before you see it.

Another thing I do is time the ship as soon as possible, even if I don't have the ID confirmed. Once you know the time, you could concentrate on what it is. Believe me, do it a few times and you'll see you have more than enough time to excecute an attack.

03-03-09, 11:53 AM

Quote:

Originally Posted by Rockin Robbins

Why would you multiply by .06 and call that easy? Why not mark two positions three minutes apart and measure the number of hundred yards. 850 yards equals 8.5 knots. THAT's what's easy. Multiplying by .06 is not.

my dad always said those who take shortcuts work the hardest trying to work the least

but at the same time, different strokes for different folks, if its easier for him then go for it.

all i know is my brain hurts when i try to think so i do it as little as possible

Rockin Robbins · 03-03-09, 06:16 PM

It would take me three minutes to multiply by .06!

mountainbikextremist · 03-03-09, 09:39 PM

3 min even with the trusty calculator?

TI83 Graphing Calculators are TOTALLY realistic...not that I need one to to multiply 150 by .06 though

We need angle on bow sir!!!
Here hang on a min....tap tap tap tap, enter....its 32 degrees to starboard.
Whats her range?
Oh hmmm, sin multiplied by what number again?
Give me that, here just use the range function!
Oh its that easy? Cool...
Range: 60 yards...fire tube one!!!

Thats the way it worked in WWII right?

Quote:

Originally Posted by Rockin Robbins

It would take me three minutes to multiply by .06!

theluckyone17 · 03-03-09, 11:11 PM

Heh. In WW2, I'd probably be the guy sticking his wet pinky (finger) up in the air, checking for which way the wind's blowing. At 'scope depth, no less.

Rockin Robbins · 03-04-09, 06:03 PM

Actually in WWII the plotting team had a collection of nifty analog slide rules that came up with the answer before you could go tap tap tap into your fancy plotting calculator. And their batteries never went dead!

Slide rules were cool before there WAS cool!

03-02-09, 09:04 PM	#6
Rockin Robbins Navy Seal Join Date: Mar 2007 Location: DeLand, FL Posts: 8,900 Downloads: 135 Uploads: 52	Why would you multiply by .06 and call that easy? Why not mark two positions three minutes apart and measure the number of hundred yards. 850 yards equals 8.5 knots. THAT's what's easy. Multiplying by .06 is not. __________________ Sub Skipper's Bag of Tricks, Slightly Subnuclear Mk 14 & Cutie, Slightly Subnuclear Deck Gun, EZPlot 2.0, TMOPlot, TMOKeys, SH4CMS

03-04-09, 06:03 PM	#15
Rockin Robbins Navy Seal Join Date: Mar 2007 Location: DeLand, FL Posts: 8,900 Downloads: 135 Uploads: 52	Actually in WWII the plotting team had a collection of nifty analog slide rules that came up with the answer before you could go tap tap tap into your fancy plotting calculator. And their batteries never went dead! Slide rules were cool before there WAS cool! __________________ Sub Skipper's Bag of Tricks, Slightly Subnuclear Mk 14 & Cutie, Slightly Subnuclear Deck Gun, EZPlot 2.0, TMOPlot, TMOKeys, SH4CMS

03-01-09, 11:31 PM	#1
mountainbikextremist Watch Join Date: May 2008 Posts: 27 Downloads: 36 Uploads: 0	EASY speed calulation 1. Mark ship position on map, and start timing for 30 seconds. 2. Mark ship position on map after 30 seconds 3. Measure distance between two points in yards 4. Multiply that number by .06 to get your speed in Knots Example: Ship traveled 150 yards in 30 seconds 150 x .06= 9 Knots Simple as that, and it is pretty damn accurate. I just sunk 2 large passenger ships using this technique "3 torps each" consecutively and all 6 fish hit home. Using this mod: http://www.subsim.com/radioroom/showthread.php?t=111371, I pinged both ships, and manually inputted their ranges into the TDC. I guesstimated their AOB and sent both to the bottom. That's pretty damn impressive for me since I have just started using manual targeting. I just have to keep a calculator by the computer

03-02-09, 10:30 AM	#2
Fish40 The Old Man Join Date: Aug 2006 Location: Yonkers, NY U.S.A. Posts: 1,507 Downloads: 154 Uploads: 0	Seems like a good tip Looks as though you don't need to identify the target useing this method. I haven't had any luck getting precise range measurements useing radar, since as far as I know, there is no numerical readout of range. There is a mod out there that addresses this, but I don't think it was made RFB compatable yet. IRL, there was indeed such a readout. I've also used the sonar ping method, but also found that faulty on occasion. The way I do it is time how long the ship takes to cross the 0 bearing line of the scope, and calculate speed useing the ship's length. There are lists out there which provide the lengths of in game ships. Of course you need to ID the ship, a challange to say the least on a pitch dark night, but it works like a charm

03-02-09, 11:13 AM	#3
Webster Stowaway Posts: n/a Downloads: Uploads:	further down the thread in post #12 you will see a different version of the same fix that works much better than how otto shows it.

03-02-09, 02:16 PM	#5
Fish40 The Old Man Join Date: Aug 2006 Location: Yonkers, NY U.S.A. Posts: 1,507 Downloads: 154 Uploads: 0	Here's the thread, and included link: http://www.subsim.com/radioroom/show...ht=range+rings

03-02-09, 10:29 PM	#7
Armistead Rear Admiral Join Date: Dec 2008 Location: on the Dan Posts: 10,880 Downloads: 364 Uploads: 0	I'm just trying to find the perfect way without contacts on to mark without pinging....Still time the passing of the ship through the crosshairs and checking my book....or leave it to the stad. Would rather have it down before they get that close.

03-03-09, 12:26 AM	#9
mountainbikextremist Watch Join Date: May 2008 Posts: 27 Downloads: 36 Uploads: 0	One of these days when I have some time, I am going to figure out how to get range w/o pinging as well. I just need to dedicate some time to sit down, do some searching for different techniques, and actually read them through them all the way. I would like to figure out the mast height to calculate range, and ship length for speed, as well as a good way to accurately calculate the AOB. One step at a time....I'm definitely making progress

03-03-09, 06:16 PM	#12
Rockin Robbins Navy Seal Join Date: Mar 2007 Location: DeLand, FL Posts: 8,900 Downloads: 135 Uploads: 52	It would take me three minutes to multiply by .06! __________________ Sub Skipper's Bag of Tricks, Slightly Subnuclear Mk 14 & Cutie, Slightly Subnuclear Deck Gun, EZPlot 2.0, TMOPlot, TMOKeys, SH4CMS

03-03-09, 11:11 PM	#14
theluckyone17 Captain Join Date: May 2006 Location: Niskayuna, NY Posts: 482 Downloads: 103 Uploads: 0	Heh. In WW2, I'd probably be the guy sticking his wet pinky (finger) up in the air, checking for which way the wind's blowing. At 'scope depth, no less.