How do I calculate speed

ADMIRALTIA · 03-07-12, 06:39 AM

Hello Im wondering whats the best way to calculate ship speed using the metric system.

blkdimnd · 03-07-12, 07:26 AM

If using contacts on the Nav Map.

Place a marker at the tip of that contact, time for 3 minutes and 15 sec. then place a second mark.

Measure the distance, the distance/100 will equal the speed.

ie. 500m = 5 kts
1300m = 13 kts.

ADMIRALTIA · 03-07-12, 07:43 AM

So every 100m per 3 mins is 1 knot I'll try that. Thanks a million

blkdimnd · 03-07-12, 12:40 PM

Quote:

Originally Posted by ADMIRALTIA

So every 100m per 3 mins is 1 knot I'll try that. Thanks a million

No,
Every 100m per 3 mins 15 sec (3+15) is 1 knot.

You use 3 mins for imperial measurements (yards), which is not what you want to use unless you chose to use imperial units in the options settings.

Captain_AJ · 03-07-12, 07:31 PM

or use this method

1 go to your soan ships( id book)

2, find out what the legnth of the ship is

3. put your cross hair of your scope in front of the bow and than start your clock

4. once the ships stern ends on the crosshair from bow to stern stop the clock

5 divided the the lenght of the ship by the secs on the clock

lenght./sec
multiply that by 1.9
and that will give you the speed of the ship

Hint if you are attacking a convoy . most all of the ships except the warships are travelling at the same speed

there are some video tutrials using a cronometer , under stoaiams vedieos that will also give you another option for a method

"FRY SOME BREAKFAST ON A BURNIING FRIEGHTER "

Dignan · 03-07-12, 08:14 PM

Quote:

Originally Posted by kimuraijn

or use this method

1 go to your soan ships( id book)

2, find out what the legnth of the ship is

3. put your cross hair of your scope in front of the bow and than start your clock

4. once the ships stern ends on the crosshair from bow to stern stop the clock

5 divided the the lenght of the ship by the secs on the clock

lenght./sec
multiply that by 1.9
and that will give you the speed of the ship

Hint if you are attacking a convoy . most all of the ships except the warships are travelling at the same speed

there are some video tutrials using a cronometer , under stoaiams vedieos that will also give you another option for a method

"FRY SOME BREAKFAST ON A BURNIING FRIEGHTER "

It's probably worth noting that for this method you will get more accurate speeds estimations if you are completely stopped.

quink99 · 03-07-12, 09:01 PM

Two of my favorites for both ease and speed are;

The U-jagd Chronometer

If you're using TDW's New UIs 6.9.0 then just right click on your clock and that will become the U-jagd chrono. One drawback to this method is that you must ID the target to get her length which, in any case, is a good idea unless you aspire to be named a war criminal. It's my favorite method for most occasions. For a great Stoianm tutorial as to how to use the U-jagd chrono go here;

http://www.subsim.com/radioroom/showpost.php?p=1655674&postcount=54

The one minute method

Plot the course of your target on the NAV or TAI map as has been mentioned several times in the posts below but mark the times for only one minute rather than 3'15'' or 5' and then use your ruler to measure that one minute in meters. Multiply the result in meters by .032 and you'll have the speed in knots.

With this method you don't need to ID the target and it is one the fastest methods when things get rushed. It's drawback is that you have to do a little plotting work.

ADMIRALTIA · 03-08-12, 05:06 AM

Quote:

Originally Posted by blkdimnd

No,
Every 100m per 3 mins 15 sec (3+15) is 1 knot.

You use 3 mins for imperial measurements (yards), which is not what you want to use unless you chose to use imperial units in the options settings.

Thanks for the correction

DelphiUniverse · 03-07-12, 11:07 PM

1 knot equals 0.514 metres per second.
2 knots equals 1,028 metres per second.

10 knots equals 0.514 * 10 = 5.14 metres per second

15 knots equals 7.71 metres per second

You don't want to measure the speed by cutting the 3:15 rule in half, nor in 4 pieces, you need the 3 minutes and 15 seconds because SH5 uses intervals of 50 metres, you can't measure lower than that, plot your marks very carefully at fully zoomed level, be accurate.

1: Plot a mark on the ship
2: Start stopwatch
3: Wait 3:15
4: Be ready to plot the ship again exactly at 3:15 at the exact same place on the ship
5: Measure the length between the two points, remove the last 2 digits and there is your speed (or simply put a comma separator before the last two digits)

03-07-12, 06:39 AM	#1
ADMIRALTIA Machinist's Mate Join Date: Feb 2012 Location: Dumaguete City, Negros Oriental, Philippines Posts: 129 Downloads: 68 Uploads: 3	How do I calculate speed Hello Im wondering whats the best way to calculate ship speed using the metric system.

03-07-12, 07:26 AM	#2
blkdimnd Planesman Join Date: May 2010 Location: Vermont, USA Posts: 186 Downloads: 492 Uploads: 0	If using contacts on the Nav Map. Place a marker at the tip of that contact, time for 3 minutes and 15 sec. then place a second mark. Measure the distance, the distance/100 will equal the speed. ie. 500m = 5 kts 1300m = 13 kts. __________________ My Mod Soup and System Specs. "Those who would give up essential liberty to purchase a little temporary safety deserve neither liberty nor safety." Benjamin Franklin, Historical Review of Pennsylvania, 1759 AB1TA

03-07-12, 07:31 PM	#5
Captain_AJ Crusty Join Date: Jun 2005 Location: USA Posts: 649 Downloads: 334 Uploads: 0	or use this method 1 go to your soan ships( id book) 2, find out what the legnth of the ship is 3. put your cross hair of your scope in front of the bow and than start your clock 4. once the ships stern ends on the crosshair from bow to stern stop the clock 5 divided the the lenght of the ship by the secs on the clock lenght./sec multiply that by 1.9 and that will give you the speed of the ship Hint if you are attacking a convoy . most all of the ships except the warships are travelling at the same speed there are some video tutrials using a cronometer , under stoaiams vedieos that will also give you another option for a method "FRY SOME BREAKFAST ON A BURNIING FRIEGHTER " __________________ Captain AJ

03-07-12, 09:01 PM	#7
quink99 中国水兵 Join Date: Jul 2011 Posts: 278 Downloads: 941 Uploads: 0	Two of my favorites for both ease and speed are; The U-jagd Chronometer If you're using TDW's New UIs 6.9.0 then just right click on your clock and that will become the U-jagd chrono. One drawback to this method is that you must ID the target to get her length which, in any case, is a good idea unless you aspire to be named a war criminal. It's my favorite method for most occasions. For a great Stoianm tutorial as to how to use the U-jagd chrono go here; http://www.subsim.com/radioroom/showpost.php?p=1655674&postcount=54 The one minute method Plot the course of your target on the NAV or TAI map as has been mentioned several times in the posts below but mark the times for only one minute rather than 3'15'' or 5' and then use your ruler to measure that one minute in meters. Multiply the result in meters by .032 and you'll have the speed in knots. With this method you don't need to ID the target and it is one the fastest methods when things get rushed. It's drawback is that you have to do a little plotting work. Last edited by quink99; 03-08-12 at 02:19 PM.

03-07-12, 07:43 AM	#3
ADMIRALTIA Machinist's Mate Join Date: Feb 2012 Location: Dumaguete City, Negros Oriental, Philippines Posts: 129 Downloads: 68 Uploads: 3	So every 100m per 3 mins is 1 knot I'll try that. Thanks a million

03-07-12, 11:07 PM	#9
DelphiUniverse 中国水兵 Join Date: Mar 2010 Location: Scapa Flow, underneath a ferry Posts: 272 Downloads: 125 Uploads: 0	1 knot equals 0.514 metres per second. 2 knots equals 1,028 metres per second. 10 knots equals 0.514 * 10 = 5.14 metres per second 15 knots equals 7.71 metres per second You don't want to measure the speed by cutting the 3:15 rule in half, nor in 4 pieces, you need the 3 minutes and 15 seconds because SH5 uses intervals of 50 metres, you can't measure lower than that, plot your marks very carefully at fully zoomed level, be accurate. 1: Plot a mark on the ship 2: Start stopwatch 3: Wait 3:15 4: Be ready to plot the ship again exactly at 3:15 at the exact same place on the ship 5: Measure the length between the two points, remove the last 2 digits and there is your speed (or simply put a comma separator before the last two digits)