Torpedoes over shoot targets

[aloe1]

Please can someone help, I have followed WAZOOS targetting help both basic and advanced 90 degree targetting. When carrying ot a 90 degree basic target shoot with torpedoes i always seem to end up with my tin fish overshooting the target by about 5 metres very close each time. i am following the instructions and each time i end up so close as they skim the bow of the moving ships very frustrating. Can anyone advise me please or tell me which dial to alter slighty in the TDC so they dont overshoot. I am so close all the time to hitting the ships. Thid does happen on shoots from 1500m or over.

Many thanks
Andy

Quick-n-easy answer: Hit the "L" key to unlock the target tracking, and wait until the crosshairs just leave the back end of the ship; this should give you a dead-center hit.

Originally Posted by aloe1

Can anyone advise me please or tell me which dial to alter slighty in the TDC so they dont overshoot. I am so close all the time to hitting the ships.

You really haven't given enough information to completely diagnois the problem.

That said, I believe the most important factor in torpedo accuracy is target speed. If you are off by 1/2 knot or higher you stand to miss your aiming point. And the greater your target distance the greater the miss. It sounds like you consistently over estimate the target speed by 1/2 to 1 knot. You didn't state how you arrive at target speed but you might try dropping it back by 1/2 knot, then 1 knot and see what happens.

If it is not an error in target speed, then it is a problem with angle on the bow (AOB). I have found this to be the best way to compute angle on the bow. (1) On nav map, plot target course. (2) Plot your course on nav map which should cross target course. (3) Using angle tool, draw a line from sub to intersecting point of courses, and then place third point of angle at any point on target course in the direction of targets travel. (4) Note the angle. This is your AOB at that spot on the map and will never change unless the target changes course. (5) Go to periscope or UZO view and set the periscope or UZO view to 0 degrees. Then clear notepad of all information. Click angle on the Bow (AOB) and manually input the exact degrees you calculated in step #3, click the checkmark to go to the notepad view and then double click the checkmark to enter the value in the data computer. (6) You can now move the periscope or UZO in any direction and the correct AOB will be computed in the target data computer. This will only change if the target changes course. The sub can change course and the target data computer will correct for this. If the target begins to zig-zag, the original AOB will still be relatively accurate. The target is still travelling on the same true course, it just takes him a little bit longer to get there; thus target speed has been reduce but not by much; maybe a quarter to half a knot.

I hope this is helpful. It might be helpfull to use the Weapons Officer's assistance until you get a real good handle on what the target data computer is doing.

In real life, U-boat commander traning (if I recall correctly) required 90 surface torpedo attacks and 90 submerged torpedo attacks before being rated as a frontboot ready for war patrol.

[Der Eisen-Wal]

Originally Posted by von Zelda

You really haven't given enough information to completely diagnois the problem.

That said, I believe the most important factor in torpedo accuracy is target speed. If you are off by 1/2 knot or higher you stand to miss your aiming point. And the greater your target distance the greater the miss. It sounds like you consistently over estimate the target speed by 1/2 to 1 knot. You didn't state how you arrive at target speed but you might try dropping it back by 1/2 knot, then 1 knot and see what happens.

If it is not an error in target speed, then it is a problem with angle on the bow (AOB). I have found this to be the best way to compute angle on the bow. (1) On nav map, plot target course. (2) Plot your course on nav map which should cross target course. (3) Using angle tool, draw a line from sub to intersecting point of courses, and then place third point of angle at any point on target course in the direction of targets travel. (4) Note the angle. This is your AOB at that spot on the map and will never change unless the target changes course. (5) Go to periscope or UZO view and set the periscope or UZO view to 0 degrees. Then clear notepad of all information. Click angle on the Bow (AOB) and manually input the exact degrees you calculated in step #3, click the checkmark to go to the notepad view and then double click the checkmark to enter the value in the data computer. (6) You can now move the periscope or UZO in any direction and the correct AOB will be computed in the target data computer. This will only change if the target changes course. The sub can change course and the target data computer will correct for this. If the target begins to zig-zag, the original AOB will still be relatively accurate. The target is still travelling on the same true course, it just takes him a little bit longer to get there; thus target speed has been reduce but not by much; maybe a quarter to half a knot.

I hope this is helpful. It might be helpfull to use the Weapons Officer's assistance until you get a real good handle on what the target data computer is doing.

In real life, U-boat commander traning (if I recall correctly) required 90 surface torpedo attacks and 90 submerged torpedo attacks before being rated as a frontboot ready for war patrol.

perfect. make sure you have the AOB correct, and the speed correct. you should not be moving as you shoot unless it's a stationary target.

[Steeltrap]

Movin isn't important, and you have to move while submerged in NYGM 2.2 or you can't maintain depth (as it should be, and moving was even more vital when firing torps submerged due to sudden loss of weight).

Biggest issue is speed. I find the stadimeter a real pain in the butt - resolution simply isn't sharp enough to give good ranges. I've tested this by comparing my range estimates with ones where I've enabled auto map updates and I'm regularly off by up to 500m even at 3000, which is just hopeless. In fact, the inability to determine ranges effectively is the one thing I find most disappointing about manual TDC.

Without accurate range determining course and speed becomes almost impossible, at least not accurately. Once you've errors in course and speed, these will affect your solutions, magnifying the errors.

However, if you're only missing by a narrow amount, your issue is either speed (most likely) or the ship is zig-zagging, in which case AOB is going to differ from your calculation. The idea of unlocking the target then shooting at various positions is exactly what I do:

Hold periscope/UZO on fixed line with small/zero gyro.
Let ship reach point along firing line in sight and let fly. REMEMBER to have opened the tube prior to firing (Q key) or there will be a delay in launch, which can cause a miss.
Assuming you're accurate, torp will hit where you've aimed.
If not, will deviate around the point of aim.
Because of this, I regularly aim in forward and aft thirds of ship. That usually ensures at lest one hit (although duds are an issue....).
Incidentally, if damage is modelled correctly, a hit in the engine spaces aft will pretty much sink anything, and this has been my experience in NYGM 2.2.

Hope some of this helps.

[aloe1]

thanks guys for all your help will give this ago, i do the old spped measurment by WAZOOS standards plot target for 3.5 mins and then measure distance.

Originally Posted by aloe1

thanks guys for all your help will give this ago, i do the old spped measurment by WAZOOS standards plot target for 3.5 mins and then measure distance.

I also recomend to you to use the map update - it will much more easy for you at the start? Wen you feel you get more expirienced - try without it. Its worked for me when i learned the manual targeting.

Any way - Good luck - and SINK THEM ALL

[JohnnyBlaze]

Originally Posted by aloe1

thanks guys for all your help will give this ago, i do the old spped measurment by WAZOOS standards plot target for 3.5 mins and then measure distance.

You mean 3 minutes and 15 seconds rule ?

Originally Posted by aloe1

thanks guys for all your help will give this ago, i do the old spped measurment by WAZOOS standards plot target for 3.5 mins and then measure distance.

If you are using 3 1/2 minutes to calculate target speed, that might be your problem.

[SteamWake]

Did you remember to open the tube doors prior to launch ?

Thatll throw off your calculations too.