Knots meters & time calculations

PapaG39 · 08-24-07, 03:09 PM

I'm having a heck of a time coming up with the correct answers on my calculator.
I printed out a bunch of stuff to read in reference to knots, meters & kilometers, but I'm still not coming up with the correct answers to simple problems.

Such as: using the 0-1200 meters map I went with my little sub for 1000 meters in 9 minutes. I think the formula is KM (1.0) devided by my 9 minutes should give me the knots I'm going.. It doesn't so I must be doing something wrong.

The same thing in distance to go time. KM devided by my knots should give me time to a spot. But it doesn't work out.. it seems to be way off...

This is driving me more crazy then I already am...lol..

GoldenRivet · 08-24-07, 03:13 PM

http://www.csgnetwork.com/csgtsd.html

a good time speed distance calculator, allows you to choose from different speed and distance measures and mix and match them.

http://www.convert-me.com/en/convert/length

good online distance converter

maybe these will help you?

ichso · 08-24-07, 03:44 PM

1kn = 1.88km/h
So if you got your time in seconds or minutes, calculate the hours of it, the distance in km and you can calculate your speed in km/h.

Then just divide by 1.88 and you got the knots you where travelling.

I'm using a standard hand held calculator for those things, working well.

Brag · 08-24-07, 04:12 PM

Time enroute -- Distance in kilometres divided by 1.8 = miles to go, divide by speed in knots = time enroute.

The answer will be in hours and decimals of hour.

Example: 7.25 seven hours and 15 minutes
7.5 seven hours and 30 minutes.

six minutes is one tenth of an hour.

PapaG39 · 08-25-07, 03:38 AM

I know that this is clear as glass to u guys, but it is mud to me.
We are dealing in meters, kilometers & knots here & I can't get them sorted.

I did a trial run with a boat & wrote down the figures. using the online calculator it comes out correctly.

I did 1500 meters in 3:11 & the boat indicated 15kts

using my calculator I did: Speed X Time, 15kts X 3.183 = 47.74 what the heck is this number??? I went 1.5 km. or 1500 meters.

Distance divided by speed = time 1.5 divided by 15kts = .10 ??

Distance divided by time = speed 1.5 divided by 3.183 = .47

I have no idea what i'm doing here...maybe you really can't teach an old dog new tricks.. these meters kilometers & knots have me stopped.

I know that the minutes have to be converted to a decimal by dividing minutes by 60. Is it the same way for the seconds?

PapaG39 · 08-25-07, 01:45 PM

I know that there must be a good explanation on this forum on kilometers vs knots, but darned if I can run across it via the search method.
I know that someone must have had as much problem understanding this meters, kilometers, knots & minutes/seconds, degrees stuff as me...
At least one other guy on the planet anyway...

joegrundman · 08-25-07, 07:33 PM

Hi there Papa G

Have you installed GWX? With this mod there are some speed conversion tables that are extremely useful.

I have also built myself a KM whiz wheel.

http://www.subsim.com/radioroom/show...ght=whiz+wheel

These things are worth their weight in gold, and can be used for so much. One of the small capabilites of the reverse side, which is a cricular slide rule, is that you can very quickly cross reference 1000m with 9 minutes to obtain a speed of 3.6knots.

Alternatively you can install any of the nomograph mods, which enable you to do this. A nomograph is a scale that will appear on your navmap and can be used to solve any speed/time/distance calculation assuming you know two of the factors. Run a search to find a nomograph mod. You can also find them linked from Wazoo's basic manual targetting tutorial.

Finally, you can just make sure that you take time measurements in increments of 3min15seconds. In 3min 15secs an object moves 100m for every knot of speed, so a 6knot object travels 600m, or 0.6km. At 9min 45 secs therefore a 6 knot object travels 1.8km. (kilometers is written with a small km; KM means Kriegsmarine).

If you'd taken your reading at 9min 45secs, and it had travelled 1200m, the speed would be 1200/3 per 3min 15 secs= 400m per 3 min 15 secs = 4 knots

joe

08-24-07, 03:09 PM	#1
PapaG39 Frogman Join Date: Jun 2007 Location: Phoenix, Arizona Posts: 297 Downloads: 4 Uploads: 0	Knots meters & time calculations I'm having a heck of a time coming up with the correct answers on my calculator. I printed out a bunch of stuff to read in reference to knots, meters & kilometers, but I'm still not coming up with the correct answers to simple problems. Such as: using the 0-1200 meters map I went with my little sub for 1000 meters in 9 minutes. I think the formula is KM (1.0) devided by my 9 minutes should give me the knots I'm going.. It doesn't so I must be doing something wrong. The same thing in distance to go time. KM devided by my knots should give me time to a spot. But it doesn't work out.. it seems to be way off... This is driving me more crazy then I already am...lol..

08-24-07, 03:13 PM	#2
GoldenRivet Subsim Aviator Join Date: Mar 2007 Location: Texas Posts: 8,726 Downloads: 146 Uploads: 0	http://www.csgnetwork.com/csgtsd.html a good time speed distance calculator, allows you to choose from different speed and distance measures and mix and match them. http://www.convert-me.com/en/convert/length good online distance converter maybe these will help you? __________________

08-24-07, 03:44 PM	#3
ichso Ace of the Deep Join Date: Jul 2005 Location: Germany's oldest city alive Posts: 1,066 Downloads: 57 Uploads: 0	1kn = 1.88km/h So if you got your time in seconds or minutes, calculate the hours of it, the distance in km and you can calculate your speed in km/h. Then just divide by 1.88 and you got the knots you where travelling. I'm using a standard hand held calculator for those things, working well. __________________ My Subskins: http://www.subsim.com/radioroom/showthread.php?t=164169

08-24-07, 04:12 PM	#4
Brag Navy Seal Join Date: Nov 2006 Location: Docked on a Russian pond Posts: 7,072 Downloads: 2 Uploads: 0	Time enroute -- Distance in kilometres divided by 1.8 = miles to go, divide by speed in knots = time enroute. The answer will be in hours and decimals of hour. Example: 7.25 seven hours and 15 minutes 7.5 seven hours and 30 minutes. six minutes is one tenth of an hour. __________________ Espionage, adventure, suspense, are just a click away Click here to look inside Brag's book: Amazon.com: Kingmaker: Alexey Braguine: Books Order Kingmaker here: http://www.subsim.com/store.html For Tactics visit:http://www.freewebs.com/kielman/

08-25-07, 07:33 PM	#7
joegrundman Ocean Warrior Join Date: May 2007 Posts: 2,689 Downloads: 34 Uploads: 0	Hi there Papa G Have you installed GWX? With this mod there are some speed conversion tables that are extremely useful. I have also built myself a KM whiz wheel. http://www.subsim.com/radioroom/show...ght=whiz+wheel These things are worth their weight in gold, and can be used for so much. One of the small capabilites of the reverse side, which is a cricular slide rule, is that you can very quickly cross reference 1000m with 9 minutes to obtain a speed of 3.6knots. Alternatively you can install any of the nomograph mods, which enable you to do this. A nomograph is a scale that will appear on your navmap and can be used to solve any speed/time/distance calculation assuming you know two of the factors. Run a search to find a nomograph mod. You can also find them linked from Wazoo's basic manual targetting tutorial. Finally, you can just make sure that you take time measurements in increments of 3min15seconds. In 3min 15secs an object moves 100m for every knot of speed, so a 6knot object travels 600m, or 0.6km. At 9min 45 secs therefore a 6 knot object travels 1.8km. (kilometers is written with a small km; KM means Kriegsmarine). If you'd taken your reading at 9min 45secs, and it had travelled 1200m, the speed would be 1200/3 per 3min 15 secs= 400m per 3 min 15 secs = 4 knots joe __________________ "Enemy submarines are to be called U-Boats. The term submarine is to be reserved for Allied under water vessels. U-Boats are those dastardly villains who sink our ships, while submarines are those gallant and noble craft which sink theirs." Winston Churchill Last edited by joegrundman; 08-25-07 at 08:39 PM.

08-25-07, 03:38 AM	#5
PapaG39 Frogman Join Date: Jun 2007 Location: Phoenix, Arizona Posts: 297 Downloads: 4 Uploads: 0	I know that this is clear as glass to u guys, but it is mud to me. We are dealing in meters, kilometers & knots here & I can't get them sorted. I did a trial run with a boat & wrote down the figures. using the online calculator it comes out correctly. I did 1500 meters in 3:11 & the boat indicated 15kts using my calculator I did: Speed X Time, 15kts X 3.183 = 47.74 what the heck is this number??? I went 1.5 km. or 1500 meters. Distance divided by speed = time 1.5 divided by 15kts = .10 ?? Distance divided by time = speed 1.5 divided by 3.183 = .47 I have no idea what i'm doing here...maybe you really can't teach an old dog new tricks.. these meters kilometers & knots have me stopped. I know that the minutes have to be converted to a decimal by dividing minutes by 60. Is it the same way for the seconds?

08-25-07, 01:45 PM	#6
PapaG39 Frogman Join Date: Jun 2007 Location: Phoenix, Arizona Posts: 297 Downloads: 4 Uploads: 0	I know that there must be a good explanation on this forum on kilometers vs knots, but darned if I can run across it via the search method. I know that someone must have had as much problem understanding this meters, kilometers, knots & minutes/seconds, degrees stuff as me... At least one other guy on the planet anyway...