The 10 second wait !

Hardigen · 10-02-12, 03:35 AM

Having just begun to Manual target,Depending on range ,waiting 10 seconds for speed would it not effect the AoB slightly .50 to 75 % of my torpedoes are going astern of the target ,Is my assumption correct or does my problem lie elsewhere ? .(bow doors open and made AoB calculator).And these errors are at the Naval Academy which is easier than being on patrol. Answers from all skippers will be noted and highly regarded. From another noob who could,nt hit a barn door with a 12 bore . H

TwoGamers · 10-02-12, 05:49 AM

Im not sure how to fix your problem but it isn't because of your AOB maybe there spotting your torpedo?

TabbyHunter · 10-02-12, 09:54 AM

Wait 30 seconds for speed, make a second range check, fire.

derrinurban · 10-02-12, 10:06 AM

Seems to me to be more of a speed issue. How are you calculating target speed. AOB will have a small affect on the firing solution, but generally Target speed is more crucial.

Woolfman · 10-02-12, 11:54 AM

Quote:

Originally Posted by Hardigen

Having just begun to Manual target,Depending on range ,waiting 10 seconds for speed would it not effect the AoB slightly .50 to 75 % of my torpedoes are going astern of the target ,Is my assumption correct or does my problem lie elsewhere ? .(bow doors open and made AoB calculator).And these errors are at the Naval Academy which is easier than being on patrol. Answers from all skippers will be noted and highly regarded. From another noob who could,nt hit a barn door with a 12 bore . H

I use the 3 mins. 15 seconds method to calculate speed, heading, AOB, distance. While this method yields varying distance measurements I find it more convenient than using the notepad!

Check out these videos made by Dantenoc:

Hope this sends you in the right direction.

Regards,

Woolfman

derrinurban · 10-02-12, 02:52 PM

That is the method I use as well.

Hardigen · 10-03-12, 10:18 AM

My thanks to you all for the tips and hints . The You tube threads are great Woolfman

Pisces · 10-03-12, 01:23 PM

The notepad method relies on accurate range measurement and AOB measurement to get it right. During the speed measurement it only measures the amount the periscope turns while it is locked on the target. From those data it can calculate a knots value. While it is locked on the target, the AOB pointer is kept updated internaly as the lock moves. So that is not the cause

This method has to start with an accurate range. Unfortunately this is difficult due to mastheight errors in the recognition manual, but also due to rendering artifacts. (mast gets clipped from the image because it is thinner the pixels) Also, you need to put the lower line at the right waterline of the ship. It's easy to get the range wrong here. When you are on the surface you can ask your deck officer to provide a range and compare it. But that of course won't help when you are submerged.

AOB is also tricky to read because of perspective changes. It takes effort and practise to get it right estimating it by eye. But when it reaches 90 AOB then the differences are less problematic.

One reason of inaccuracy that can happen during the speed-measurement part of the notepad method, is slight changes in own course due to wave action. If you don't take enough time to allow the bearing to change significantly then the slight wobble in the lock might get it to give the wrong speed. The wobble of the periscope should be a lot less then the amount the periscope turns due to the moving target.

[EDIT] The moral of this story is: try plotting instead, to learn speed and course.

BillCar · 10-03-12, 08:43 PM

It should take you 30 seconds to get speed via fixed wire method. Place your UZO or periscope reticule at 000 and angle your bow across the path of the target ship. Once its bow crosses the vertical line of your reticule, start the stopwatch. When the stern crosses the reticule, stop it. Multiply the length of the ship by 2 (1.94 to be precise, but 2 will work), and then divide this number by the number of seconds it took for the ship to cross your reticule. Congratulations, you now have the exact speed of your target, and you can easily reverify every 30 seconds if you want (though once should be enough

). Range is inconsequential, and so is the angle of travel – this will work from any AOB to the enemy ship, so long as your reticule is at 000 degrees to your bow.

When starting out, at least, you do need to identify the ship properly to gauge its length, though many types of ships in similar weight classes have similar lengths – i.e., most small freighters are ~75m long. If you get a number that seems way off, make sure you haven't misjudged the length of the vessel.

Sank 120,000 tons of shipping on my last patrol at full realism and with Hitman's GUI mod that doesn't allow for the notepad or stadiametric ranging, so I assure you that this method works. I never bother with the 3m15s method anymore, because I could verify the ship's speed 6.5 times over in that timeframe!

10-02-12, 03:35 AM	#1
Hardigen Sparky Join Date: May 2012 Location: Lancashire ,England Posts: 158 Downloads: 165 Uploads: 0	The 10 second wait ! Having just begun to Manual target,Depending on range ,waiting 10 seconds for speed would it not effect the AoB slightly .50 to 75 % of my torpedoes are going astern of the target ,Is my assumption correct or does my problem lie elsewhere ? .(bow doors open and made AoB calculator).And these errors are at the Naval Academy which is easier than being on patrol. Answers from all skippers will be noted and highly regarded. From another noob who could,nt hit a barn door with a 12 bore . H

10-03-12, 08:43 PM	#9
BillCar Engineer Join Date: Dec 2009 Location: Canada Posts: 203 Downloads: 73 Uploads: 0	It should take you 30 seconds to get speed via fixed wire method. Place your UZO or periscope reticule at 000 and angle your bow across the path of the target ship. Once its bow crosses the vertical line of your reticule, start the stopwatch. When the stern crosses the reticule, stop it. Multiply the length of the ship by 2 (1.94 to be precise, but 2 will work), and then divide this number by the number of seconds it took for the ship to cross your reticule. Congratulations, you now have the exact speed of your target, and you can easily reverify every 30 seconds if you want (though once should be enough). Range is inconsequential, and so is the angle of travel – this will work from any AOB to the enemy ship, so long as your reticule is at 000 degrees to your bow. When starting out, at least, you do need to identify the ship properly to gauge its length, though many types of ships in similar weight classes have similar lengths – i.e., most small freighters are ~75m long. If you get a number that seems way off, make sure you haven't misjudged the length of the vessel. Sank 120,000 tons of shipping on my last patrol at full realism and with Hitman's GUI mod that doesn't allow for the notepad or stadiametric ranging, so I assure you that this method works. I never bother with the 3m15s method anymore, because I could verify the ship's speed 6.5 times over in that timeframe! __________________ SH3: 100% Realism, DID, GWX 3.0 + SH3 Commander 3.2 + HITMAN'S BETA GUI FOR GWX 3.0 (in a word: AMAZING) + FM Interiors + SH5 Water + Thomsen's Sound Pack 3.2 + BillCar's Sonar Ping http://tinyurl.com/billcarpingmod SH4: 100% Realism, DID, RFB / TMO1.9+RSRDC / OM+OMEGU.

10-02-12, 05:49 AM	#2
TwoGamers Officer Join Date: Jul 2012 Location: Australia Posts: 240 Downloads: 9 Uploads: 0	Im not sure how to fix your problem but it isn't because of your AOB maybe there spotting your torpedo?

10-02-12, 09:54 AM	#3
TabbyHunter Ensign Join Date: May 2010 Location: Pandora. Not the blue cat people Pandora... Posts: 227 Downloads: 52 Uploads: 0	Wait 30 seconds for speed, make a second range check, fire.

10-02-12, 10:06 AM	#4
derrinurban Mate Join Date: Aug 2009 Location: Calgary, Alberta, Canada Posts: 54 Downloads: 33 Uploads: 0	Seems to me to be more of a speed issue. How are you calculating target speed. AOB will have a small affect on the firing solution, but generally Target speed is more crucial.

10-02-12, 02:52 PM	#6
derrinurban Mate Join Date: Aug 2009 Location: Calgary, Alberta, Canada Posts: 54 Downloads: 33 Uploads: 0	That is the method I use as well.

10-03-12, 10:18 AM	#7
Hardigen Sparky Join Date: May 2012 Location: Lancashire ,England Posts: 158 Downloads: 165 Uploads: 0	My thanks to you all for the tips and hints . The You tube threads are great Woolfman

10-03-12, 01:23 PM	#8
Pisces Silent Hunter Join Date: Dec 2004 Location: AN9771 Posts: 4,904 Downloads: 304 Uploads: 0	The notepad method relies on accurate range measurement and AOB measurement to get it right. During the speed measurement it only measures the amount the periscope turns while it is locked on the target. From those data it can calculate a knots value. While it is locked on the target, the AOB pointer is kept updated internaly as the lock moves. So that is not the cause This method has to start with an accurate range. Unfortunately this is difficult due to mastheight errors in the recognition manual, but also due to rendering artifacts. (mast gets clipped from the image because it is thinner the pixels) Also, you need to put the lower line at the right waterline of the ship. It's easy to get the range wrong here. When you are on the surface you can ask your deck officer to provide a range and compare it. But that of course won't help when you are submerged. AOB is also tricky to read because of perspective changes. It takes effort and practise to get it right estimating it by eye. But when it reaches 90 AOB then the differences are less problematic. One reason of inaccuracy that can happen during the speed-measurement part of the notepad method, is slight changes in own course due to wave action. If you don't take enough time to allow the bearing to change significantly then the slight wobble in the lock might get it to give the wrong speed. The wobble of the periscope should be a lot less then the amount the periscope turns due to the moving target. [EDIT] The moral of this story is: try plotting instead, to learn speed and course.