On manual targetting how do I compute target speed?

Castout · 05-14-08, 12:21 PM

I'm wondering that now I give the u-boat mission/SH4 1.5 a try well the damn button to calculate the target speed is still broken.

How do you play with manual solution?

I love SH3. I even play SH3 with modded TDC so I use mechanical computer dials to make my solution.

SH4 even if the measuring speed was not broken it would still feel arcadish. I gave up on SH4 after the first 2 patches or was that three? Now even with v1.5 it's still proving itself not a worthy successor to SH3.

akdavis · 05-14-08, 01:03 PM

Simplest way in my opinion (short of guessing), is to range and mark the target on the map, wait 6 minutes and range and mark the target again. Measure the distance between the two marks (in nautical miles) and multiply by 10. You now have the target's speed in knots. This is made even simpler with the addition of target icons and/or a nomograph.

UrPeaceKeeper · 05-14-08, 01:23 PM

Another way to measure it is to set your periscope just infront of the ship (this method works best when you are as close to perpendicular as possible with the targets path) Get out the chronometer and when the bow of the ship hits the vertical line in the periscope start the chronometer. DONT MOVE THE PERISCOPE!!! when the Stern of the ship hits the vertical line stop the chronometer. Get out the paper manual that came with the game. Now divide that length by the time and multiply by two. This gives you a pretty good guestimate of the speed (in knots) I always round up to the nearest half a knot to compensate for any errors and angle issues that come up when you are not perfectly perpendicular to the target when measuring. So far so good! It's more accurate than the guess speed button for the US TDC. Havent tried to work out manual targeting on the U-boats yet, been playing around with my Pocket BB too much

akdavis · 05-14-08, 01:34 PM

Quote:

Originally Posted by UrPeaceKeeper

Another way to measure it is to set your periscope just infront of the ship (this method works best when you are as close to perpendicular as possible with the targets path) Get out the chronometer and when the bow of the ship hits the vertical line in the periscope start the chronometer. DONT MOVE THE PERISCOPE!!! when the Stern of the ship hits the vertical line stop the chronometer. Get out the paper manual that came with the game. Now divide that length by the time and multiply by two. This gives you a pretty good guestimate of the speed (in knots) I always round up to the nearest half a knot to compensate for any errors and angle issues that come up when you are not perfectly perpendicular to the target when measuring. So far so good! It's more accurate than the guess speed button for the US TDC. Havent tried to work out manual targeting on the U-boats yet, been playing around with my Pocket BB too much

Yes, but this only works for AOBs near 90, correct?

UrPeaceKeeper · 05-14-08, 01:40 PM

I've had it work out to as far as 45 degrees AOB. I always took two measurments anyways. The first set was when it was far out there to get the correct ships heading and distance and a rough speed (so I could compensate my attacks so I got a near perfect 90 degree AOB) The second is when the target is much closer and is generally about 30 seconds before I launch torpedo's and that is to make sure everything is honed in perfect so that I'm gaurnteed a hit. So I guess yes you could say it works best at 90 degrees AOB but it's close enough. I havent missed very many ships since using that instead of the Crew determined speed (which I find to be off)

Your method is certainly more practical but 6 minutes is a long time to wait to get a targets speed!

Squid95 · 05-14-08, 03:53 PM

Quote:

Originally Posted by akdavis

Quote:

Originally Posted by UrPeaceKeeper

Another way to measure it is to set your periscope just infront of the ship (this method works best when you are as close to perpendicular as possible with the targets path) Get out the chronometer and when the bow of the ship hits the vertical line in the periscope start the chronometer. DONT MOVE THE PERISCOPE!!! when the Stern of the ship hits the vertical line stop the chronometer. Get out the paper manual that came with the game. Now divide that length by the time and multiply by two. This gives you a pretty good guestimate of the speed (in knots) I always round up to the nearest half a knot to compensate for any errors and angle issues that come up when you are not perfectly perpendicular to the target when measuring. So far so good! It's more accurate than the guess speed button for the US TDC. Havent tried to work out manual targeting on the U-boats yet, been playing around with my Pocket BB too much

Yes, but this only works for AOBs near 90, correct?

Any object of known length will traverse a point in space at the same time no matter the observed angle. If the AOB is zero there will be no observable speed across the fixed point ie Perscope crosshairs or periscope edge, but with any measurable AOB the target motion across the point of reference will be visible therefore measurable. Just remember that own ships speed can offset fixed point of reference speed estimate.

If you are behind, unless you can end round your screwed anyway, if your in front and AOB is zero, you may have a shot and of course you should open up the angle for an ideal solution.

Any good skipper will use many methods to get good solution data, nomogragh, fixed reference, plotting and measuring time, distance. I personally use the built in speed estimate with good results. Just remember that the greater the range to contact the greater the error. Get as many estimates as possible and average them out.

There are many posts on this topic, just not in the mod forum.

UrPeaceKeeper · 05-14-08, 05:51 PM

One thing to note though is that if you are moving this can throw off the results if you are not at a 90AOB. I always go to full stop before an attack anyways (I'm an ideal Sub captain

) That is, if I'm attacking a moving target. Most of my sinkings are from sneaking into big ports like Singapore, Bankok, etc and sinking the merchants there. I find more pleasure in sneaking past DD guards to the goods and sometimes the tonnage is amazing!.

05-14-08, 12:21 PM	#1
Castout Silent Hunter Join Date: Nov 2006 Location: Jakarta Posts: 4,794 Downloads: 89 Uploads: 6	On manual targetting how do I compute target speed? I'm wondering that now I give the u-boat mission/SH4 1.5 a try well the damn button to calculate the target speed is still broken. How do you play with manual solution? I love SH3. I even play SH3 with modded TDC so I use mechanical computer dials to make my solution. SH4 even if the measuring speed was not broken it would still feel arcadish. I gave up on SH4 after the first 2 patches or was that three? Now even with v1.5 it's still proving itself not a worthy successor to SH3. __________________ My blog: http://exposingsingapore.wordpress.com/

05-14-08, 01:03 PM	#2
akdavis Samurai Navy Join Date: Mar 2005 Location: Fort Worth, Texas Posts: 597 Downloads: 0 Uploads: 0	Simplest way in my opinion (short of guessing), is to range and mark the target on the map, wait 6 minutes and range and mark the target again. Measure the distance between the two marks (in nautical miles) and multiply by 10. You now have the target's speed in knots. This is made even simpler with the addition of target icons and/or a nomograph. __________________ -AKD

05-14-08, 01:23 PM	#3
UrPeaceKeeper Helmsman Join Date: Apr 2005 Posts: 106 Downloads: 41 Uploads: 0	Another way to measure it is to set your periscope just infront of the ship (this method works best when you are as close to perpendicular as possible with the targets path) Get out the chronometer and when the bow of the ship hits the vertical line in the periscope start the chronometer. DONT MOVE THE PERISCOPE!!! when the Stern of the ship hits the vertical line stop the chronometer. Get out the paper manual that came with the game. Now divide that length by the time and multiply by two. This gives you a pretty good guestimate of the speed (in knots) I always round up to the nearest half a knot to compensate for any errors and angle issues that come up when you are not perfectly perpendicular to the target when measuring. So far so good! It's more accurate than the guess speed button for the US TDC. Havent tried to work out manual targeting on the U-boats yet, been playing around with my Pocket BB too much

05-14-08, 01:40 PM	#5
UrPeaceKeeper Helmsman Join Date: Apr 2005 Posts: 106 Downloads: 41 Uploads: 0	I've had it work out to as far as 45 degrees AOB. I always took two measurments anyways. The first set was when it was far out there to get the correct ships heading and distance and a rough speed (so I could compensate my attacks so I got a near perfect 90 degree AOB) The second is when the target is much closer and is generally about 30 seconds before I launch torpedo's and that is to make sure everything is honed in perfect so that I'm gaurnteed a hit. So I guess yes you could say it works best at 90 degrees AOB but it's close enough. I havent missed very many ships since using that instead of the Crew determined speed (which I find to be off) Your method is certainly more practical but 6 minutes is a long time to wait to get a targets speed!

05-14-08, 05:51 PM	#7
UrPeaceKeeper Helmsman Join Date: Apr 2005 Posts: 106 Downloads: 41 Uploads: 0	One thing to note though is that if you are moving this can throw off the results if you are not at a 90AOB. I always go to full stop before an attack anyways (I'm an ideal Sub captain ) That is, if I'm attacking a moving target. Most of my sinkings are from sneaking into big ports like Singapore, Bankok, etc and sinking the merchants there. I find more pleasure in sneaking past DD guards to the goods and sometimes the tonnage is amazing!.