SUBSIM Radio Room Forums - View Single Post - Advanced TDC School: Multiple target attack

Frederf · 07-11-08, 11:49 PM

In SH4 the other day I attacked a 3x2 convoy. 800yd spacing lateral, 1000yd spacing longitudinal. I fired them in the following order with 29kt electric torpedos.

Far Advance
Far Trail
Medium Advance
Medium Trail
Near Advance
Near Trail

I figured what time it takes for a 29 kt torpedo to cross 800 to 850 yards between ships and tried to fire along those times. The torps heading for the front ships were going to take a little longer so I shot them first.

It was done in such a way that row wasn't aligned just yet so I had room to shoot in front of their bows in order to miss the near ships to hit the far. The ones destined for the middle ships had the benefit of being a deeper depth for bigger ships so that wasn't too bad.

I used a torpedo track angle of about 15 degrees I think so that any miss would have a chance of hitting another ship in the row. This only worked for the first row, the angle on the rear row made it a "this ship of nothing" affair. The convoy was doing 9 knots and the torps 29 so that's 17 degrees to run a torp through the imaginary center of a whole row. The 15 instead of 17 was because when ships evade they tend to lag behind so a lagging shot has a better chance to hit.

The first row passed by about 500m and the second is about 500m from passing my bow. The formation is 1600yd wide and I'm 800 from the near column so I'm using about all of the 4000yd range on these babies (remember the long shots are going slanty so travel longer than 1600+800).

Fire one, fire two. Has that been about 25 seconds? Yeah I think so. More like 30.
Fire three, fire four. That took too long. I hope they don't impact early.
Fire five, fire six. Ok that's everything. Hard to port, depth 400.

External camera.

Approximatelya minute after the last launch the first should hit. .... Torpedo impact!
Torpedo impact!
Torpedo impact!
Torpedo impact!
Torpedo impact! All within about 8 seconds of each other. That's one for the history books.

Three broke up immediately. I've never had such luck with single torps. It usually takes 2-3 to sink anything bigger than a DD. Four and five sunk some 5 and 20 minutes later. The lucky one in the far row got away. The escorts hounded me for ages sending me back to port early with some large holes on my deck. I swear they have golden ears.

07-11-08, 11:49 PM	#9
Frederf Seasoned Skipper Join Date: Apr 2005 Posts: 665 Downloads: 79 Uploads: 1	In SH4 the other day I attacked a 3x2 convoy. 800yd spacing lateral, 1000yd spacing longitudinal. I fired them in the following order with 29kt electric torpedos. Far Advance Far Trail Medium Advance Medium Trail Near Advance Near Trail I figured what time it takes for a 29 kt torpedo to cross 800 to 850 yards between ships and tried to fire along those times. The torps heading for the front ships were going to take a little longer so I shot them first. It was done in such a way that row wasn't aligned just yet so I had room to shoot in front of their bows in order to miss the near ships to hit the far. The ones destined for the middle ships had the benefit of being a deeper depth for bigger ships so that wasn't too bad. I used a torpedo track angle of about 15 degrees I think so that any miss would have a chance of hitting another ship in the row. This only worked for the first row, the angle on the rear row made it a "this ship of nothing" affair. The convoy was doing 9 knots and the torps 29 so that's 17 degrees to run a torp through the imaginary center of a whole row. The 15 instead of 17 was because when ships evade they tend to lag behind so a lagging shot has a better chance to hit. The first row passed by about 500m and the second is about 500m from passing my bow. The formation is 1600yd wide and I'm 800 from the near column so I'm using about all of the 4000yd range on these babies (remember the long shots are going slanty so travel longer than 1600+800). Fire one, fire two. Has that been about 25 seconds? Yeah I think so. More like 30. Fire three, fire four. That took too long. I hope they don't impact early. Fire five, fire six. Ok that's everything. Hard to port, depth 400. External camera. Approximatelya minute after the last launch the first should hit. .... Torpedo impact! Torpedo impact! Torpedo impact! Torpedo impact! Torpedo impact! All within about 8 seconds of each other. That's one for the history books. Three broke up immediately. I've never had such luck with single torps. It usually takes 2-3 to sink anything bigger than a DD. Four and five sunk some 5 and 20 minutes later. The lucky one in the far row got away. The escorts hounded me for ages sending me back to port early with some large holes on my deck. I swear they have golden ears.