WI U-boats sink 20% more Allied tonnage in 1941-43

Deleted member 1487

It might not be safe to assume that much increased focus on anti-submarine a/c would result in more rapid development in anti sub a/c technology, but... Development tends to come faster in the areas of greatest focus.

Sure, what suffers as a result?

If there's any side in WW2 more likely to work out how best to actually do things, given enough data, it's the Western Allies.
http://en.wikipedia.org/wiki/Operations_research#Second_World_War

Sure, but they still made plenty of mistakes in spite of that:
https://en.wikipedia.org/wiki/Dodecanese_Campaign
https://en.wikipedia.org/wiki/Battle_of_Berlin_(air)
 
Sure, what suffers as a result?



Sure, but they still made plenty of mistakes in spite of that:
https://en.wikipedia.org/wiki/Dodecanese_Campaign
https://en.wikipedia.org/wiki/Battle_of_Berlin_(air)

What suffers is Bomber Command's strategic bombing effort. Either they'd scale back the whole thing, or else focus down on the bits that could have REAL effect: attacks against oil infrastructure, perhaps, rather than just burning down German homes.

But if uboats were sinking 20% more ships, it would deserve greater resources to counter, and those resources would almost have to come from Bomber Command.

Edit: actually, I don't think BC settled down to making attacks on civilians their main focus until sometime in '42. So the effort taken from BC in '41 would really be trading bombers wandering ineffectually and individually across W Europe hunting for industrial targets, for more aircraft hunting uboats. The "de-housing" campaign would only be affected in embryo, as it were.
 

Saphroneth

Banned
Sure, what suffers as a result?



Sure, but they still made plenty of mistakes in spite of that:
https://en.wikipedia.org/wiki/Dodecanese_Campaign
https://en.wikipedia.org/wiki/Battle_of_Berlin_(air)


As for the first one - let's go with a reduction in the attempts to Sink the Tirpitz, one fewer Arctic Convoys, and more aircraft transferred from Bomber Command to Coastal Command. More drain on their heavy capital ships, a little more logistical strain for the Russians in 1942-3, and slightly less of a German city burned to the ground each fortnight.

As for the second - yes, they made mistakes. But the U-boat campaign is one example where great dividends were paid OTL from improved tactics with a small research outlay.
 
Things the British could do to counteract Germans fixing their torpedo dud rate and inflicting a major shipping crisis.

1) Don't bother counterattacking the Italians in North or East Africa in December 1940. The Italians arn't going to do anything and attacking just gets the Germans involved.
2) Don't get involved in Greece either.
3) Use a fleet carrier or two for convoy cover, even if this means not doing something like the Taranto raid or reducing Malta Convoys.
4) Don't bother with trying to maintain Malta as an active forward air and sea base. It would be hard for the Axis to push into Egypt anyway through normal port and road capacity logistics issues.
5) Regardless of who is in North Africa or when don't try to take anything in Libya or Cyrencia until 1943. As long as the British hold Alexandria and Gibralter they can start the ultimate counter offensive eventually whenever they want and win.
6) Don't get too immediately worried about Vichy colonies or its Navy. Initial policy should be as long as Vichy isn't moving their fleet units between bases and are keeping the Germans out we are not going to worry if the fleet is in Oran or the West Indies. USA diplomacy can help here.
7) Once USA is in the war, you are going to win eventually, reduce bulk imports into Britain even if British manufacturing production starts to slip.
8) Be more passive in the Pacific. The risk/reward of committing major fleet units to Midway/Coral Sea/Tokyo raids/Guadacanal really don't seem worth it. If the Japanese try to invade Midway sit back and watch the Marines shoot up the Japanese trying to wade in. Rely on submarines (if the Germans get to fix their torpedo problems its only fair the USA fixes theirs too). Put a USA fleet carrier on Atlantic convoy cover duty.

I would only reduce if absolutely necessary. (Soviet Union was really only in serious danger October through December 1941, Bomber command raids and even the beginning trickle of Lend Lease help Soviet morale in this critical time even if only symbolic). From the lens of the time. I would be really worried about the Soviets in October 41 if I were the British.
1) Keep up Bomber command raids in 1941 (but reduce in 42 or later)
2) Keep up Lend Lease in 1941 (but reduce in 42 or later)
 
Things the British could do to counteract Germans fixing their torpedo dud rate and inflicting a major shipping crisis.

1) Don't bother counterattacking the Italians in North or East Africa in December 1940. The Italians arn't going to do anything and attacking just gets the Germans involved.
2) Don't get involved in Greece either.
3) Use a fleet carrier or two for convoy cover, even if this means not doing something like the Taranto raid or reducing Malta Convoys.
4) Don't bother with trying to maintain Malta as an active forward air and sea base. It would be hard for the Axis to push into Egypt anyway through normal port and road capacity logistics issues.
5) Regardless of who is in North Africa or when don't try to take anything in Libya or Cyrencia until 1943. As long as the British hold Alexandria and Gibralter they can start the ultimate counter offensive eventually whenever they want and win.
6) Don't get too immediately worried about Vichy colonies or its Navy. Initial policy should be as long as Vichy isn't moving their fleet units between bases and are keeping the Germans out we are not going to worry if the fleet is in Oran or the West Indies. USA diplomacy can help here.
7) Once USA is in the war, you are going to win eventually, reduce bulk imports into Britain even if British manufacturing production starts to slip.
8) Be more passive in the Pacific. The risk/reward of Midway/Coral Sea/Tokyo raids/Guadacanal really don't seem worth it. If the Japanese try to invade Midway sit back and watch the Marines shoot up the Japanese trying to wade in. Rely on submarines (if the Germans get to fix their torpedo problems its only fair the USA fixes theirs too). Put a USA fleet carrier on Atlantic convoy cover duty.

I would only reduce if absolutely necessary. (Soviet Union was really only in serious danger October through December 1941, Bomber command raids and even the beginning trickle of Lend Lease help Soviet morale in this critical time even if only symbolic)
1) Keep up Bomber command raids in 1941 (but reduce in 42 or later)
2) Keep up Lend Lease in 1941 (but reduce in 42 or later)

True, these are possible. I just think the most likely response would be to (1) grab a/c already available or in the immediate pipeline, from Bomber Command; and (2) divert some of the bloated production effort invested in Bomber Command to anti-sub equipments.

Even in '41, even with what Bomber Command's offensive meant to British and Soviet morale, there were people already arguing the effort could be better spent elsewhere. More pressure from uboats would strengthen that argument.
 

Saphroneth

Banned
What suffers is Bomber Command's strategic bombing effort. Either they'd scale back the whole thing, or else focus down on the bits that could have REAL effect: attacks against oil infrastructure, perhaps, rather than just burning down German homes.

But if uboats were sinking 20% more ships, it would deserve greater resources to counter, and those resources would almost have to come from Bomber Command.

Edit: actually, I don't think BC settled down to making attacks on civilians their main focus until sometime in '42. So the effort taken from BC in '41 would really be trading bombers wandering ineffectually and individually across W Europe hunting for industrial targets, for more aircraft hunting uboats. The "de-housing" campaign would only be affected in embryo, as it were.
Oh, yeah, good point.
Ah, Bomber Command. The only force that could launch a raid on Germany and hit Liverpool. (In fairness, that did only happen once that I know of.)
We should probably count ourselves lucky they didn't sink King George V...
 
Oh, yeah, good point.
Ah, Bomber Command. The only force that could launch a raid on Germany and hit Liverpool. (In fairness, that did only happen once that I know of.)
We should probably count ourselves lucky they didn't sink King George V...

OTL, Bomber Command was supported by some pretty amazing techie talent. Witness H2S, Oboe, Monica, and the very effective marking techniques eventually evolved.

Despite their many awful failures (and there were still some big ones quite late in the war), one can't help wondering what they could have achieved if they'd decided early on to cultivate their ability to find and hit targets of individual value much more precisely.

If they stuck with night bombing, no doubt German residential areas would still have experienced immense devastation despite BC's best efforts to precisely hit industrial targets within the cities. But I'd be willing to bet the net effect would've been damage much more focused on worthwhile targets. It would take awhile to develop the equipment and methods for relatively-accurate night bombing; but OTL they did eventually get pretty good, and if they'd focused on the precision requirement earlier, who knows?

If they decided on daytime bombing, they'd have spent a while nibbling at the edges of Hitler's empire, but I suspect they would have developed long range escort fighters rather earlier. And by later 1944, at the least, BC's bomber crews had the technical ability to be quite accurate in daylight (more so, I suspect, than 8th AF).

In either case, the big problem would've been the very lengthy period of experimentation, with its casualties and frustrations, before effective equipment and methods finally came together.
 

Saphroneth

Banned
OTL, Bomber Command was supported by some pretty amazing techie talent. Witness H2S, Oboe, Monica, and the very effective marking techniques eventually evolved.
Oboe in particular is very interesting, yes. And I seem to recall there was an Arthur C. Clarke book about his time as a tech during the world's first electronics war. (ECM and ECCM, and so on).
All those lovely gadgets... my favorite is probably the one which pipes engine noise at maximum volume over the German night fighter control frequencies.
 
All those lovely gadgets... my favorite is probably the one which pipes engine noise at maximum volume over the German night fighter control frequencies.

Yeah, that one is just... well, kind of elegant!

Have you read "The Other Battle" by Peter Hinchliffe? I'm re-reading it now. It covers the Bomber Command-Nachtjagd struggle, and treats on most of the gadgets.
 

BlondieBC

Banned
Good, the Allies still have more slack.

Note BTW that the lack of reaction after an opposing side's action is always a mistake - even when, say, it's the Allies doing an ATL action and the Axis that doesn't react.
For some reason, however, lots of posters don't want the Allies to do better in an ATL.

Sure the Allies have more slack, but it does not mean improvements come automatically. It takes time. Let's take a real example. T-34 comes into wide use in summer 1942. Quite a shock to Germans. They do some immediate things working with existing equipment to help limit losses. But it takes months, leaning towards years, to get the counter tanks deployed. At no point in WW2 is Germany better off than if the Russians produced a much crappier tank as some ATL T-34 with defective armor and an unpowered gun. Germany is only better off than if they had taken no counter measures.

Same here. If Germany has better torpedoes, the Allies have more losses. Over time as the POD develops, they Allies will take some counter measures. Some obvious potential ones are things like slowing operations in the Pacific, building a few more escorts, cancelling a few ops. All these come at a cost to the Allies, and they do worse than OTL.
 

BlondieBC

Banned
Things the British could do to counteract Germans fixing their torpedo dud rate and inflicting a major shipping crisis.

1) Don't bother counterattacking the Italians in North or East Africa in December 1940. The Italians arn't going to do anything and attacking just gets the Germans involved.
2) Don't get involved in Greece either.
3) Use a fleet carrier or two for convoy cover, even if this means not doing something like the Taranto raid or reducing Malta Convoys.
4) Don't bother with trying to maintain Malta as an active forward air and sea base. It would be hard for the Axis to push into Egypt anyway through normal port and road capacity logistics issues.
5) Regardless of who is in North Africa or when don't try to take anything in Libya or Cyrencia until 1943. As long as the British hold Alexandria and Gibralter they can start the ultimate counter offensive eventually whenever they want and win.
6) Don't get too immediately worried about Vichy colonies or its Navy. Initial policy should be as long as Vichy isn't moving their fleet units between bases and are keeping the Germans out we are not going to worry if the fleet is in Oran or the West Indies. USA diplomacy can help here.
7) Once USA is in the war, you are going to win eventually, reduce bulk imports into Britain even if British manufacturing production starts to slip.
8) Be more passive in the Pacific. The risk/reward of committing major fleet units to Midway/Coral Sea/Tokyo raids/Guadacanal really don't seem worth it. If the Japanese try to invade Midway sit back and watch the Marines shoot up the Japanese trying to wade in. Rely on submarines (if the Germans get to fix their torpedo problems its only fair the USA fixes theirs too). Put a USA fleet carrier on Atlantic convoy cover duty.

I would only reduce if absolutely necessary. (Soviet Union was really only in serious danger October through December 1941, Bomber command raids and even the beginning trickle of Lend Lease help Soviet morale in this critical time even if only symbolic). From the lens of the time. I would be really worried about the Soviets in October 41 if I were the British.
1) Keep up Bomber command raids in 1941 (but reduce in 42 or later)
2) Keep up Lend Lease in 1941 (but reduce in 42 or later)

Not a bad list of counter measures. I tend to think you still take East Africa since it sits on the supply lines to Egypt, you can isolate it, and it is very hard to U-boats to work in the India Ocean. At first blush, the supplies of the cancelled operations you list probably exceed the supplies lost in the sinkings, so lets go to second order butterflies. Allies still win, but here are some things to deal with.

1) If North Africa is not counter attacked, and Malta falls (really more abandoned all but in name), then the Africa Corp does not go to Africa. These units will inevitably go to fight Russia. Much lower fighter losses to Germans in Med. Fewer supplies consumed on Italians on defensive in North Africa. Fewer ships lost as result. Fewer ships lost due to Malta not falling. If writing a TL, we now have to deal with additional issues in Russia. Little things like Panzer division losing all its tanks in sunk freighter don't happen.

2) Also helps Germans in Russia.

3) Helps Italian navy a bunch. Means you need to have more warships for Torch since these BB that are sunk IOTL might come out to play in Torch.

4) See #1, but yes, Italians will not take Egypt, especially since Africa Corp never arrives in Africa.

5) Yes, you have staging grounds. But to be fair, Torch came from USA not Gibraltar, so the rock is overstated a lot in importance.

6) Some risks, but probably does not show up as risk that becomes major issue.

7) Yes, Allies win.

8) You still fight pure naval battles. USA carriers are not great choice for Med or to sit for long near any Axis European coast in 1942.



But it gets worse. Maybe Wiking can speak to where the Germans are most likely to use the extra forces, but it will hurt Russia. We have plenty of what if based on Axis doing better, so let's go over some potential ones.

A) Extra forces focused on Army Group North. Leningrad is either totally cutoff or falls in 1941. Big help for Germans.

B) Forces thrown towards Moscow. Don't think Moscow falls, but lead recon elements of Germans could see Kremlin. Lot, Lot more damage to Moscow before they are push back. Just the effect of fight.

C) Army Group South. Less clear here, but pretty sure lines are farther east. Helps in 1942.


Ok, now Soviets still have good winter. But Germans can still attack in 1942. Probably most of the extra forces for Germans ground up over winter, but Soviet adittional losses worse. Keep 1942 plan the same. We have fewer Soviet counter attack, weaker attacks. Is 6th Army still lost. Maybe the Volga can be held in part until 1943. Also, Torch might be late. USA has to attack somewhere. Probably still does, but we have likely cut out the Italian part of the campaign. Italy stays in war longer.

Sure Allies win, but a lot of extra Allied fighters and civilians die. Not all POD's change who wins wars.
 
Actually, I'd have said Britain had very little slack in 41-42, while America's industrial strength (which is what gave the Allies slack) wasn't really mobilized until well after Dec41.

Yeah, and the original post posited a constant increase in the German submarine arm's success rate from 1941 through to 1943.
 
Sure the Allies have more slack, but it does not mean improvements come automatically. It takes time. Let's take a real example. T-34 comes into wide use in summer 1942. Quite a shock to Germans. They do some immediate things working with existing equipment to help limit losses. But it takes months, leaning towards years, to get the counter tanks deployed. At no point in WW2 is Germany better off than if the Russians produced a much crappier tank as some ATL T-34 with defective armor and an unpowered gun. Germany is only better off than if they had taken no counter measures.

The Germans, yes. The ones that were trying to run the war on a shoestring.

Same here. If Germany has better torpedoes, the Allies have more losses. Over time as the POD develops, they Allies will take some counter measures. Some obvious potential ones are things like slowing operations in the Pacific, building a few more escorts, cancelling a few ops. All these come at a cost to the Allies, and they do worse than OTL.

Or maybe the Allies cancel some of the 1941 strategic air operations against Germany, which had little effect if any, use the long-range aircraft for ASW, and they are actually better off. And/or maybe the Allies are initially worse off in 1941, yes, but by the law of unintended consequences their reaction to the increased submarine threat is so decided and successful - and they have the wherewithal for that - that by the end of 1942 the German submarine threat is way less present than in OTL, and the Allies, taking into account the whole war, are... you guessed it... better off.

The bottom line is that the Germans were the gambler playing roulette against the house. You can get the occasional lucky outcome, sure. For a while.
The Allies were the house. Not only the game is stacked in favor of the house; the house also has the deepest pockets, and that makes all of the difference, no matter how lucky the gambler may be a few times. The house can afford losing some hefty wads of money; if the gambler keeps playing, he'll lose amounts that he cannot afford, in the end.

---

As a corollary to this, I was thinking about the idea that in order to have efficient German torpedoes in 1939 one only has to take a clever, hard-working officer and use him to replace the stoopid sloth that it is assumed the Germans had supervising the torpedo program.
Is that it, really?
Won't the intelligent, energetic officer demand more tests, more torpedoes to try, more work on designs, more personnel?
So we go back to the First Law of Everything:

"For everything, you need more time and money"

In other words, won't it still end with with an admiral saying: "Sorry, those are good ideas, but we can't fund them right now, we're building those big prestige warships that will be mostly useless"?

I don't know. Wiking has clearly a deeper knowledge of the issue than me, so maybe he can show the improvements wouldn't cost much more and wouldn't require much more time and personnel.
But if it's so, let's be aware that is an exception rather than the rule as to how Everything usually goes.
 

Saphroneth

Banned
The bottom line is that the Germans were the gambler playing roulette against the house. You can get the occasional lucky outcome, sure. For a while.
The Allies were the house. Not only the game is stacked in favor of the house; the house also has the deepest pockets, and that makes all of the difference, no matter how lucky the gambler may be a few times. The house can afford losing some hefty wads of money; if the gambler keeps playing, he'll lose amounts that he cannot afford, in the end.

Related to this is the tacit assumption that, with German improvements starting in 1933, everything the Germans do up to Sickle-Cut goes exactly as it does OTL. It's kind of the equivalent of asking for a do-over in a game of cards, but insisting you get the same royal flush you did in the third hand last time - because it happened!
 

BlondieBC

Banned
Related to this is the tacit assumption that, with German improvements starting in 1933, everything the Germans do up to Sickle-Cut goes exactly as it does OTL. It's kind of the equivalent of asking for a do-over in a game of cards, but insisting you get the same royal flush you did in the third hand last time - because it happened!


I don't know where you are even getting this from. If we are talking about a radical overhaul of naval strategy going back to 1933, then yes. But we are not doing anything radical. We are looking at some additional weapon testing, probably in 1940 for this POD. We are looking for better training among at most thousand but probably a few hundred people using the radios. Training on the little things such as not miscoding stuff, not sending needless messages like "Happy Birthday Hitler", better use of the point plus angle plus distance system to give location.
 

Rubicon

Banned
Whilst I'm sure Plutonium is very sorry to be an inconvenience to the Nazis, the reality is that if Germany is still in a position to put up a fight in August '45 then the bomb's dropping. Maybe not on Berlin mind but that isn't my scenario.
Not only did you not understand why I wrote what I wrote, you kept up arguing about it.

Every time someone brings up either the a-bomb or anthrax in regards to a Nazi-German POD in the way you did I know that said person have no interest in either understanding the POD and its consequenses or for that matter in learning anything. The only thing such an argument says is that the person that brings it up is only interested in "winning" an argument, to be blunt the only thing it says is: It doesn't matter and I don't care what Germany does, the UK and the USA will always win by either A-bombs or Anthrax.

The most polite thing I will say is that such an argument is lazy, sloppy and not abetting further debating, thus not increasing awarenss and understanding of that which is discussed.

If it were on another board or in real life I'd call such an argument something else.
 

BlondieBC

Banned
The Germans, yes. The ones that were trying to run the war on a shoestring.

Or maybe the Allies cancel some of the 1941 strategic air operations against Germany, which had little effect if any, use the long-range aircraft for ASW, and they are actually better off. And/or maybe the Allies are initially worse off in 1941, yes, but by the law of unintended consequences their reaction to the increased submarine threat is so decided and successful - and they have the wherewithal for that - that by the end of 1942 the German submarine threat is way less present than in OTL, and the Allies, taking into account the whole war, are... you guessed it... better off.

The bottom line is that the Germans were the gambler playing roulette against the house. You can get the occasional lucky outcome, sure. For a while.
The Allies were the house. Not only the game is stacked in favor of the house; the house also has the deepest pockets, and that makes all of the difference, no matter how lucky the gambler may be a few times. The house can afford losing some hefty wads of money; if the gambler keeps playing, he'll lose amounts that he cannot afford, in the end.

---

As a corollary to this, I was thinking about the idea that in order to have efficient German torpedoes in 1939 one only has to take a clever, hard-working officer and use him to replace the stoopid sloth that it is assumed the Germans had supervising the torpedo program.
Is that it, really?
Won't the intelligent, energetic officer demand more tests, more torpedoes to try, more work on designs, more personnel?
So we go back to the First Law of Everything:

"For everything, you need more time and money"

In other words, won't it still end with with an admiral saying: "Sorry, those are good ideas, but we can't fund them right now, we're building those big prestige warships that will be mostly useless"?

I don't know. Wiking has clearly a deeper knowledge of the issue than me, so maybe he can show the improvements wouldn't cost much more and wouldn't require much more time and personnel.
But if it's so, let's be aware that is an exception rather than the rule as to how Everything usually goes.

You argue that doing the torpedo testing right does not help the Germans. Same for better training for communication men. You logic is thus "Better equipment and training does not help the side that does the better training, but the war goes exactly as OTL" If this is true, then

1) The T-34 did not help the Russians win the war.

2) If the torpedo factory in Germany are destroyed by French agents, the Germans still sink the same number of ships since they just find some way to compensate.

3) Training of the USA 1st Marine Division did not matter. We could have sent in men with half the training, and things turn out the same.

4) USA could build half as many Shermans, and the war goes the same.

Your logic is simply wrong. You take a valid point that once a POD happens, the impact is significant, and after some period of time, there tends to be counter measures which tend to reduce the effectiveness of the POD. You are basically arguing for predestination which I have only seen argued in salvation issues in a small % of Christian Churches and the Axis do better ideas.

BTW, since you argue that an officer can't fix the issue, I guess you are unaware how the USA fixed the issue in the Pacific. An Admiral simply believed his captain report. Set up a net in front of cliff and shot torpedoes into the cliff. The holes in the net showed they ran to deep and the lack of explosions on the cliff showed the fuses were bad. It really is this simple to fix, and there are several million Allied people who survived the war because a series of German officers and managers just did not do their job.
 

Saphroneth

Banned
I don't know where you are even getting this from. If we are talking about a radical overhaul of naval strategy going back to 1933, then yes. But we are not doing anything radical. We are looking at some additional weapon testing, probably in 1940 for this POD. We are looking for better training among at most thousand but probably a few hundred people using the radios. Training on the little things such as not miscoding stuff, not sending needless messages like "Happy Birthday Hitler", better use of the point plus angle plus distance system to give location.

It's not just this particular thread, and not even mainly this one. But if I had a pound for every time someone had had a pre-Sickle-Cut PoD for an attempt at a successful Sealion and not even bothered to address the defeat of France, as if it was a fait accomplit from the point Hitler took power... well, I'd be a fair bit better off.
In any case. To get that kind of change, you need a structural change. An all-up shakeup, in fact. That kind of institutionalized effort is hard to achieve, which is why so many forces don't do it, and it has knock-on effects. (e.g. how much more does it cost in acceptance time for the later models of U-boat if there's rigorous testing of the things that, OTL, they happened to get right easily?)
 

BlondieBC

Banned
It's not just this particular thread, and not even mainly this one. But if I had a pound for every time someone had had a pre-Sickle-Cut PoD for an attempt at a successful Sealion and not even bothered to address the defeat of France, as if it was a fait accomplit from the point Hitler took power... well, I'd be a fair bit better off.
In any case. To get that kind of change, you need a structural change. An all-up shakeup, in fact. That kind of institutionalized effort is hard to achieve, which is why so many forces don't do it, and it has knock-on effects. (e.g. how much more does it cost in acceptance time for the later models of U-boat if there's rigorous testing of the things that, OTL, they happened to get right easily?)

No you don't need a big change. You just need a part or two changed in the warhead. The USA had some issue with the strength of the metal in the firing pin. So this is a simple POD. We still have OTL stuff. Norway ships get away, etc. France still falls. Then we get to after France is clearly falling. We have the reports of bad torpedoes. An Admiral tells the people to retest the torpedo. It fails. You get a series of rapid, minor changes in the factory, the problem is fixed.

It is really a no more complicated change than the scrap metal the USA welded on tanks to fix a problem. Something is not working. You get reports. Reports taken seriously. You try to fix. You fix it.

The cost is actually negative. You have to go out and fire a small number of torpedoes (say 20). You start recovering the used ammo every time a German captain does not need to use an extra torpedo to sink a ship. You gain U-boats everytime you don't lose a U-boat to a battle after a fail torpedo.
 
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