Allied ASW

Gary Grigsby's strategic level wargame covering the entire War in the Pacific from 1941 to 1945 or beyond.

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Ron Saueracker
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RE: IJN submarine losses 1941-1942

Post by Ron Saueracker »

ORIGINAL: Charles_22





Oh, so you have some source somewhere that accounts for a per-shot ratio? [:D][:D] BTW, part of the whole point of this ASW debate is to state that the USN ASW was not giant killers in '42, yet that is precisely one of the things stirring this. Don't you think that having the USN attack my JA subs in deep water, BEFORE the sub fires a single shot, with my subs NEVER diving deep, subject to attack from every single escort (or ASW fleet ships possibly), while in the reverse my JA ASW combat fleets not only can't find the sub in 6/7 instances despite it being spotted by aerial recon one hex away, with the USN sub diving deep and of course the one ASW JA attack missing, a stark contrast to the ridiculous? WHAT IS IT GOING TO BE LIKE IN '44 FOR CRYING OUT LOUD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Sheesh.

This is the entire basis of any arguement vs WITP Allied ASW....period! It is deadly from the get go and is 100% effective in the 1944 Marianas scenario (over the three days it took to get all IJN subs in Allied TF hexes, the I boats were all sunk...by the way, all USN subs were sunk too) in two tests conducted by myself months ago. Further testing showed slightly less than 100% effectiveness but the fact remains that something is off. IJN ASW is too effective as well by this point given the Allied losses.

The real aspect to look at is not the accuracy perse, but the combat model. All escorts get to "line up in and have a go at the sub". This is inherently wrong and skews results in a potentially acceptable combat model. I've seen players (and AI) utilize massive (25+ASW ships) ASW TFs and escorts to take advantage of this oversight. Nix the gang bang and things might work out.
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tsimmonds
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RE: IJN submarine losses 1941-1942

Post by tsimmonds »

I thought this was interesting. Happened just now in my newest game vs the AI, scenario 15, hard, no sub doctrine.

On 12/11/41 LCDR Kuboki (L61, I58) commands a division of Asashio-class DDs operating as an ASW TF following a transport TF carrying the IJA 56th division towards deployment in Malaya.

--------------------------------------------------------------------------------
ASW attack at 34,47 (deep-water hex east of Camranh Bay)

Japanese Ships
DD Arashio
DD Michishio bags one.....
DD Oshio
DD Asashio

Allied Ships
SS KXII, hits 2, on fire, heavy damage

--------------------------------------------------------------------------------
ASW attack at 33,47 (shallow-water hex southeast of Camranh Bay)

Japanese Ships
DD Arashio
DD Michishio bags two!
DD Oshio
DD Asashio

Allied Ships
SS KXVII, hits 2, on fire, heavy damage

---------------------------------------------------------------------

Subs did not spot the transports. Gotta love those type 95 DCs. Interestingly Michishio's crew experience (70/72) remained unchanged following her twofer.
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Charles2222
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RE: IJN submarine losses 1941-1942

Post by Charles2222 »

ORIGINAL: Ron Saueracker
ORIGINAL: Charles_22





Oh, so you have some source somewhere that accounts for a per-shot ratio? [:D][:D] BTW, part of the whole point of this ASW debate is to state that the USN ASW was not giant killers in '42, yet that is precisely one of the things stirring this. Don't you think that having the USN attack my JA subs in deep water, BEFORE the sub fires a single shot, with my subs NEVER diving deep, subject to attack from every single escort (or ASW fleet ships possibly), while in the reverse my JA ASW combat fleets not only can't find the sub in 6/7 instances despite it being spotted by aerial recon one hex away, with the USN sub diving deep and of course the one ASW JA attack missing, a stark contrast to the ridiculous? WHAT IS IT GOING TO BE LIKE IN '44 FOR CRYING OUT LOUD!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!!! Sheesh.

This is the entire basis of any arguement vs WITP Allied ASW....period! It is deadly from the get go and is 100% effective in the 1944 Marianas scenario (over the three days it took to get all IJN subs in Allied TF hexes, the I boats were all sunk...by the way, all USN subs were sunk too) in two tests conducted by myself months ago. Further testing showed slightly less than 100% effectiveness but the fact remains that something is off. IJN ASW is too effective as well by this point given the Allied losses.

The real aspect to look at is not the accuracy perse, but the combat model. All escorts get to "line up in and have a go at the sub". This is inherently wrong and skews results in a potentially acceptable combat model. Nix the gang bang and things might work out.

Actually you are slightly in error. The last ASW fleet I had, consisting of 7 DD's in 12/41, entered from one hex's distance into a hex pre-spotted by aerial recon an Allied sub. The ongoing battle actually described 6 of the DD's 'not finding' the sub. One of them did find it but rendered no damage. As I pointed out in another thread, I've never seen JA subs dive deep, though that may prove a somewhat hasty observation, but the fact that 7 JA DD's (14 ASW points) can't even spot an already spotted sub is pathetic. I've had JA subs attacked by contrast, with seemingly not diving deep, and then for the ASW ships be they convoys or ASW fleets, jump on my sub without it firing a shot (Quite acceptable if the means of ASW attack were deck guns, but no, they're DC's). I'm quite certain these subs weren't pre-spotted aerially either.
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Charles2222
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RE: IJN submarine losses 1941-1942

Post by Charles2222 »

ORIGINAL: irrelevant

I thought this was interesting. Happened just now in my newest game vs the AI, scenario 15, hard, no sub doctrine.

On 12/11/41 LCDR Kuboki (L61, I58) commands a division of Asashio-class DDs operating as an ASW TF following a transport TF carrying the IJA 56th division towards deployment in Malaya.

--------------------------------------------------------------------------------
ASW attack at 34,47 (deep-water hex east of Camranh Bay)

Japanese Ships
DD Arashio
DD Michishio bags one.....
DD Oshio
DD Asashio

Allied Ships
SS KXII, hits 2, on fire, heavy damage

--------------------------------------------------------------------------------
ASW attack at 33,47 (shallow-water hex southeast of Camranh Bay)

Japanese Ships
DD Arashio
DD Michishio bags two!
DD Oshio
DD Asashio

Allied Ships
SS KXVII, hits 2, on fire, heavy damage

---------------------------------------------------------------------

Subs did not spot the transports. Gotta love those type 95 DCs. Interestingly Michishio's crew experience (70/72) remained unchanged following her twofer.

What do you mean by 'bags'? I take that to mean sinking a sub. The data of your battle shows no sinkings. You also said that one DD had 2 bags, but they add up to three. If bags are sinkings, there are only 2 subs as well. If by bags you mean hits, those two subs were hit a total of four times. So what kind of ridiculous wildness is that? I send in 7 DD's in an ASW fleet, one hex into a hex that's had a pre-spotted sub in it and can't even attack it with six of them? Did you noticed if both subs dived deep first or not?
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RE: IJN submarine losses 1941-1942

Post by tsimmonds »

Bags one=sank one; bags two=sank another one for a total of two. Sorry if that was unclear. Both are confirmed sinkings; they are on the list. The one in the deep water hex bottomed out....

What kind of DDs were they? If you use type 91 DCs vs subs in deep water, you can forget it. You need 95s in deep water. Akatsukis or later. What was their experience? Mischishio at 70/72 is pretty hot for early war; 50s will be non-hackers....
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Charles2222
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RE: IJN submarine losses 1941-1942

Post by Charles2222 »

ORIGINAL: irrelevant

Bags one=sank one; bags two=sank another one for a total of two. Sorry if that was unclear. Both are confirmed sinkings; they are on the list. The one in the deep water hex bottomed out....

What kind of DDs were they? If you use type 91 DCs vs subs in deep water, you can forget it. You need 95s in deep water. Akatsukis or later. What was their experience? Mischishio at 70/72 is pretty hot for early war; 50s will be non-hackers....

I didn't realize the class, though I will check, but that says nothing for the inability to spot an already spotted sub. In making an ASW fleet I'm just putting together ships with an ASW rating of 2 or higher, I didn't realize the DC's were different. In any event, I would expect the deep dive would've left the DD's throwing too short anyway irrespective of the individual DC. I can't see them programming a deeper running DC as an exception to the shallow DC'ing handicap.

The subs were 3 Ashahio's and 4 Shiratsuyu's, all with Type 95's. There were 2 65's and the rest were 70 or higher, with one being a 74 and another being a 75.
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RE: IJN submarine losses 1941-1942

Post by Rainerle »

Hi,
the only thing I want to add is that prior to 44 (or maybe some other late date of the war) all efforts of taking the combat to the subs (i.e. cruising with DD/SC/PC/PG into the great blue ocean) were later considered to be ineffective. The best chance to bag a sub was to be where a sub would also turn up near the convoys. I know that I repeatedly have read sources (would have to dig them up) that this was tried in WWI and WWII and was considered unproductive until a) big surplus in escorts was achieved b) planes closed the dark spots on the oceans c) tech became more sophisticated. This is IMO the main problem in WitP in the early war days, ASW TF cruising into the big blue and making contact/initiating combat just because they are in the same 60 miles hex[X(]
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Adnan Meshuggi
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RE: IJN submarine losses 1941-1942

Post by Adnan Meshuggi »

You still try to compare apples with oranges....

the IXer was the german LONG range sub, something that has to cruise half around the world into the indian ocean... these heavy and large german subs are not compareable to the american standard sub, but to the american usub-cruisers....

if you compare the standard american sub you have to compare it with the standard german sub, the VIIer... and here the advantages are at the german side.

I still say that the subs (independent what nation) should be killed, if they recive heavy damage, with a multiplicator (small) for german subs cause here there are a lot evidences of heavy damaged subs that escaped heavy dc-attacks. For the american side we have just your "word" and we have learned that you are not single eyed but blind about comparisations.... so, untill you can show the data with ressources about the ability of american subs it would be smart not to attack other posters but yourself not bring in any single source/link/reference for your opinion.

For the tanks, well the sherman is in 90 out of 100 combats dead meat compared to the tiger... just look at the combats between them...
sure, the tiger is "faulty" and has high maintanence costs, but this still does not improve the surviving capability of the shermans that encounter the tigers... so, in tank vers tank the sherman sucks, he is dead before he can do something, his gun is worser, even with "better" ammo (the 3 rounds it has are not likely the hit and the other ammo can´t do something), the story about the slow turning turret is just a story, cause the tank itself could turn quite fast and any combat at a range that this is important is a failiure... and then, if we bring in the "bad" american tank strategy (not to blame the tanker, americans never reached any high levels of tank doctrine, sure they did not need it, but this does not mean that they had some (compared to german or russian tank strategies (or soldiers who could use such strategies)....)

if we compare any situation in ww2, we allways have to look about what is compared... in reallity american ari surpress german inf, heaviest air cover improve the american positions and german tanks without fuel not longer able to move have to encouter massive numbers of allied tanks. Here, any enemy tank would be "superior" but that is not the core of this discussion. You try to bring in a false picture of situations to improve your opinion.

For the IS-Tanks, they had a great design but the gun sucked, it had to little ammo and a slow firing rate... so it was better as anything the americans had untill the late 50ties but not the "best" tank. A king tiger could match it and the kill ration would be in favour to the tiger. But sure, you can build 5 IS for one Tiger. But also, one tiger with a elite crew kills 10 or 20 IS and survive... or get killed in the first moment of surprise (or cause they have a bad day...or what else) The surprise factor allways can balance anything for or against you.

Oh, you also spoke once about the superior american optics in a m10 tank destroyer... do you have any source for this interesting opinion ? Or just a original mdiehl-quote?

About the chance to survive the same dc-attack... well, americans had much lesser experience with such things, so how should they know to manage the situation ? Just an example only for you:
If the power connection break down in new york or in a nondevelopted country, who can manage this situation better ? the new yorker or the LLDC-citicen ? Who could hold out more pain, the well educated but not trained to torture intelectual or the slave who was mistreated all his time ?

So, if you are not in the need to encounter a danger, you can´t prepare as good as the vets how encounters this all the day....

But, show me all the numbers you think you have as an evidence and we will see....

at last the american sub you quoted is named as Mid-43-sub in the game, a bug ? So, compare it with the first XXIer subs.. (same production dates...) and you compare 1939-subs with american 1943-subs....

hm, did i tell you that all american airplanes sucked heavily compared to the mig-29 ? how silly you try to bring your opinion in a better light.

For the well trained and achiving high kill ration american asw-forces... bring in your evidence before you insult other people, if you have so much knowledge, this should be easy [:'(]

but have fun with witp... i made a mdiehl-scenario, with a lot japanese überships, just to slaughter americans (i know you get upset with this, hehe...)[:D]
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RE: IJN submarine losses 1941-1942

Post by Bradley7735 »

Speaking of comparing apples to oranges....

Yes, the Tiger is better than the Sherman. In the exact same way that the Yamato is better than the Baltimore. And the Graff Spee is better than the Exeter. [8|][8|][8|]

I bet Germany would have been much better off if they had shermans and we had Tigers.
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mdiehl
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

Have any figures?

17 US submarines lost to direct ASW action during the entire war. The rest to collisions, friendly fire, training accidents, mines, and grounding.
Or so they claimed.

That's a bizarre comment. The subs ran aground. It's a documented fact with photographs, survivors accounts etc. Most of the crews were picked up by friendly escorts. As of a couple years ago, at least one of them (S-39) was still visible on the shoals where it grounded off New Guinea. If you are suggesting that there is some sort of conspiracy to cover up the existence of the secret Japanese Seawolf II class SSN attack submarines or whatever then there's no further point in responding to you.
After all, Hoyt's not perfect. He made substantial errors in The B and the J about the relative merits of the A6M and F4F.

That was my error. Had Hoyt confused with H.P. Willmott. Good read on the general strategies of the combatants but some AF myth perpetuations that, these days, don't belong in a good general history.
And where do you find that information? I somehow find it hard to believe these things seeing as how you think the Allies were so prepared pre-war for anti-submarine warfare.


So basically you find it hard to believe me because you don't want to believe me. Neatly circular logic there. Hard to reason you out of your pov since reason didn't get you there in the first place. I repeat, since you seem not to have been listening: contentless panglossian tropes like "American ASW sucked" or "The USN was lax" or "The US was unprepared" have absolutely no meaning or value unless you are willing to be specific as regards what you think was "not up to standard" (of, say, the RN). The biggest problem the USN faced in 1942 in re ASW was the lack of a sufficient number of escort vessels. Crew training was, in my opinion, as good as anyone's and better than that of any Axis power at ASW. There were a number of improvements made both in the RN and the USN in 1942 that began to rip the advantage away from submarines. Some were technological (mousetrap then hedgehog, improved sonar, centimetric radar, better RDF, better TBS, better radio and flare discipline among merchant ships, and so forth) and some organizational (such as putting the escort group cmdr on board an escort rather than a merchant, and adding a central HFDF officer and plot board to the escort group commander's ship).

To me "lax" means that you think that crews did not know how to operate their ASW equipment properly or very well (which is false) or that crews did not train realistically for ASW -- live shots and all that (which is false) or did not enagage in ASW exercises with real USN submarines playing the role of the aggressor (which is also false.. even in 1939). The lack of specifity or clarity in your general character assassination of things related to American ASW makes me suspect that you are talking about 1917 or 1864 some other wtf time period with no particular relevance to WW2.
Oh, so you have some source somewhere that accounts for a per-shot ratio?

I haven't done the calculations. But the fact remains that in 1942 the US sank more Japanese submarines than the US lost American subs to enemy ASW in the entire war. I posted these results in a thread several months ago. I recommend you read The Last Patrol 2d edition by Harry Holmes, 2001, Naval Institute Press. Since you've already stated that you don't want to believe me and therefore will not, there's no point in running you through the tallies again. Go look them up yourself (and afterward I'll take your apology if you're the sort of guy who apologises after calling someone a liar). For the Japanese losses you can see them all in the TROMs of Japanese submarines at combinedfleet.com.
BTW, part of the whole point of this ASW debate is to state that the USN ASW was not giant killers in '42, yet that is precisely one of the things stirring this.

No there are several points to thid debate. There's a latter day German AF with a long standing and fairly transparent personal agenda of rewriting history to re-enoble the Nazis, whose intellectual depth runs no deeper than "American(s) suck(ed)." There's people like you who seem willing to disparage things with some fairly broad and non-specific negative comments because someone in a book once also made broad, vague, disparaging remarks. And there's people talking about the game. If you want to talk about how the game compares with history you have to be a little more specific than "the USN was (or were not) 'giant killers' in 1941-1942." I'll agree that they werent' (because I think they were after May 1943), but that doesn't say much about how people are using subs and how people are deploying ASW assets to deal with them.
Don't you think that having the USN attack my JA subs in deep water, BEFORE the sub fires a single shot, with my subs NEVER diving deep, subject to attack from every single escort (or ASW fleet ships possibly), while in the reverse my JA ASW combat fleets not only can't find the sub in 6/7 instances despite it being spotted by aerial recon one hex away, with the USN sub diving deep and of course the one ASW JA attack missing, a stark contrast to the ridiculous?

I agree that if your description really describes your results then you are getting something that seems like a mockery of the real danger of subs. But in detail I have no particular problem with Japanese subs being detected (often but certainly not always) before they fire a shot. If they're being detected by escorts and they have enough time to dive deep they OUGHT to. IMO any ASW attack delivered by a/c on a submarine that lacks radar should be presumed to occur (most of the time) at shallow depth.

Having the USN subs escape most of the time despite being detected by a/c seems right to me. In the time between aerial detection and the arrival of surface assets a submarine can go a long ways, as the USN and RN knew from the Atlantic. The most that aerial ASW assets could do until the arrival of CVE-based hunter killer groups was to: 1. hope that they could ambush the sub and launch an effective attack before it dived, and 2. failing at that, be content in the knowledge that a submerged boat isn't keeping station with or overtaking a convoy, so the threat level from that boat is temporarily reduced.
Show me a fellow who rejects statistical analysis a priori and I'll show you a fellow who has no knowledge of statistics.

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Charles2222
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RE: IJN submarine losses 1941-1942

Post by Charles2222 »

ORIGINAL: Rainerle

Hi,
the only thing I want to add is that prior to 44 (or maybe some other late date of the war) all efforts of taking the combat to the subs (i.e. cruising with DD/SC/PC/PG into the great blue ocean) were later considered to be ineffective. The best chance to bag a sub was to be where a sub would also turn up near the convoys. I know that I repeatedly have read sources (would have to dig them up) that this was tried in WWI and WWII and was considered unproductive until a) big surplus in escorts was achieved b) planes closed the dark spots on the oceans c) tech became more sophisticated. This is IMO the main problem in WitP in the early war days, ASW TF cruising into the big blue and making contact/initiating combat just because they are in the same 60 miles hex[X(]

That sounds pretty sensible. Recognize though how my situation was somewhat different. The sub had been spotted two days running and then the ASW fleet comes, so there was actually a good reason they should be effective whereas otherwise they might not. What also gets me is the ratio of Allied ASW attacking my subs without a shot fired, because unless the sub were ran by complete incompetents then the 1st sign that a sub was in the area, early on, including up '43 I'd imagine, would be if the sub fired first. I can halfway see the sub not firing a shot and get attacked out-of-the-blue if they're awaiting aerial recon to return, but when the subs haven't sent it out, or don't have one, I have a difficult time imagining this happening in 12/41. Even on the surface the sub had less of a signature than a DD (but maybe more the PT boats and the like).
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BACK TO THE TOPIC!!!!!

Post by strawbuk »

Ahem - the Tiger fan club/strategical bad choice club is elsewhere.

Excuse the dicatorial tone, but this is not about KM subs vs IJN subs quality. Nor about how many Us went down around SC122.

Issues;

1. IN GAME how hot should allied ASW in PTO be?

2. How much does Atlantic (shipborne) experience get over into PTO? From RN to USN?
a. Was 'pre-war' in PTO ie pre 41 training is ASW extensive and relevant.

3. The role of hunter killer groups - how hot should they be? How often should they 'bump' into a sub?

4. How much ASW work/experince would any allied air unit have?

5. secondary debate on IJN ASW

I think we need to focus on ship/TF/airgroup abilities in specific actions here not global kill numbers to start with, as for the GAME if we handle our assets differently we might get a better result; tactics and technolgy please.

Skip the great 'King hated RN' debate. Mixed messages now coming out on that - AM; yes some arrogance but MD's points on rsource availabilty also true. Read four books get five views on that. (Middlebrook and Clay for a start).
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mdiehl
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

the IXer was the german LONG range sub, something that has to cruise half around the world into the indian ocean... these heavy and large german subs are not compareable to the american standard sub, but to the american usub-cruisers....

Adnan, that's just plain factually wrong. I encourage you to read ANY source about American subs. For pete's sake just go to hazegray.org. ALL the USN subs were designed to operate at long range from Peral Harbor or the West Coast to Japan save the interwar boats like the S-series. Now look at the German boats. NO type VIIs operated on the US coast because, sans refueling subs or sub tenders at large, they lacked the range to operate much west of Iceland. The valid point of comparison between USN subs and German subs is USN fleet boats with German Type IXs.
I still say that the subs (independent what nation) should be killed, if they recive heavy damage, with a multiplicator (small) for german subs cause here there are a lot evidences of heavy damaged subs that escaped heavy dc-attacks. For the american side we have just your "word" and we have learned that you are not single eyed but blind about comparisations....


The German subs should receive no "multiplicator." Fortunately the amount of data that could be affected by your wierd pov is rather small. As to the rest, you are adept at calling me "blind" wack wack blah blah. Can we move on to the subject at hand now?
For the tanks, well the sherman is in 90 out of 100 combats dead meat compared to the tiger... just look at the combats between them...

For a guy who claims to respect research your claim seems rather poorly documented. As I've said many times, the likelihood depends on the circumstances of engagement. If you're playing a video game where every Tiger and every M4 sit on ridges 1 km apart then the Tiger is better. The NUMEROUS instances of M4s killing German heavies show that the immediate circumstances of engagement affected heavily the outcome. Since the Tiger was a maintenance nightmare and very rarely seen in substantial numbers (because, like modern VWs, likely to spend as much time in the shop as on the move), there were substantial strategic drawbacks to making them. In my opinion, the Germans would have been much better served to make more 75/71 and 88 caliber TDs for the eastern front and many more PzIVs.

AM, any tanker will tell you that it is easier to aim a turrted vehicle than to turn the vehicle via tracks because the gunner, rather than the driver, is in control of most of the motion. As to the rest, you're incorrect as usual.
For the IS-Tanks, they had a great design but the gun sucked, it had to little ammo and a slow firing rate... so it was better as anything the americans had untill the late 50ties but not the "best" tank. A king tiger could match it and the kill ration would be in favour to the tiger. But sure, you can build 5 IS for one Tiger. But also, one tiger with a elite crew kills 10 or 20 IS and survive... or get killed in the first moment of surprise (or cause they have a bad day...or what else).

Actually IMO the M48 was as good as the IS2 but I think we can save that for another lifetime. A King Tiger is a portable roadblock with a built-in ATG. Too bad it couldn't get out of its own way. Yeah yeah wack wack the Soviets, Americans, Brits etc were inferior to the Germans in every possible way (your usual Goebbelspiel) and yet somehow the Russians cleaned your clocks at Kursk and danced a jig on top of the Reichstag. Whatever.
Just an example only for you:
If the power connection break down in new york or in a nondevelopted country, who can manage this situation better ? the new yorker or the LLDC-citicen ? Who could hold out more pain, the well educated but not trained to torture intelectual or the slave who was mistreated all his time ?


Wait, let me guess, 'the Superior German can respond to all adverse situations better.'
So, compare it with the first XXIer subs.. (same production dates...) and you compare 1939-subs with american 1943-subs....

The sub availability are deployment dates not production dates. By deployment date, the Type XXI is a 1945 boat. I agree it was the best boat that never accomplished anything. It was, strategically speaking, nothing more than a footnote in the last chapter of the Battle of the Atlantic. The US did not spend the bulk of its money designing a boat to survive Allied ASW because none of the Axis powers had anything approaching Allied ASW capability. Had we needed anything like the Type XXI I think someone would have designed it and built it.
hm, did i tell you that all american airplanes sucked heavily compared to the mig-29 ? how silly you try to bring your opinion in a better light.

Take your pills AM. Of course American WW2 airplanes sucked in comparison with the MiG 29.
i made a mdiehl-scenario, with a lot japanese überships, just to slaughter americans (i know you get upset with this, hehe...)

LOL! Adnan, rather than making me upset it makes me happy. With Germans like you around, maybe there's hope that the next time you all get uppity the French will win![:D]
Show me a fellow who rejects statistical analysis a priori and I'll show you a fellow who has no knowledge of statistics.

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RE: IJN submarine losses 1941-1942

Post by CJ Martin »

ORIGINAL: Adnan Meshuggi
but have fun with witp... i made a mdiehl-scenario, with a lot japanese überships, just to slaughter americans (i know you get upset with this, hehe...)[:D]

[X(]

Anyone else think that comment is in poor taste?

-CJ
mdiehl
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

I'm okay with it CJ. Poor taste sure, but his calculus assumed that I and only I would be annoyed. I doubt that he meant to offend anyone but me. I guess he was wrong on both counts. You have to have heard the guy talking about 'American WW2 war crimes' in the same context as the Holocaust and German occupation policies in the USSR to get the sort of thick skin you need.
Show me a fellow who rejects statistical analysis a priori and I'll show you a fellow who has no knowledge of statistics.

Didn't we have this conversation already?
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strawbuk
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RE: IJN submarine losses 1941-1942

Post by strawbuk »

So is...

ORIGINAL: mdiehl

I am pretty sure that you are a close descendant or at least highly partisan affectionate devotee of Goebbel's and a latter day neo-nazi revisionist. Can we move on to the subject at hand now?

So let us all cool it shall we?
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spence
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RE: IJN submarine losses 1941-1942

Post by spence »

Oh what the heck.

The Allies (RN) started off WWII sinking roughly 2 UBoats/month (9 in 39, 23 in 40) progressed to 3/mo in 41, to 7/mo in 42 and finished the war out nailing an average of 20/mo for the rest of the war. The U-Boats sank roughly 15 million tons of shipping over the course of the war with the perponderance of the losses inflicted in the early to mid war period.

The American Army was deployed, supplied and ultimately victorious on the far side of the Atlantic in the face of the U-Boats best efforts.

In conclusion Allied ASW was ultimately very effective in protecting shipping and inflicting damaging losses on the Germans

Can't find a similar breakdown of stats for the Pacific but the number of Japanese subs sunk (excluding midgets) is between 127 and 131 depending on source so that would indicate that the Allies (US) averaged 3(-)/mo from 12/41-8/45. Most of the remaining Japanese subs were dockside at the end of the war due to maintenance issues/heavy damage.

The American Army/Marines deployed, were supplied and victorious all across the wide Pacific.

In conclusion Allied (US) ASW was pretty effective in protecting shipping and inflicting damaging losses on the IJN.

During the same period the Allied (US) subs sank something like 9 million tons of merchant and naval shipping. Japanese garrisions, Japanese industry and the Japanese population in home islands were on the verge of starving when the final bell rang. During that same period the US lost 52 subs of which about 20% were to groundings/accidents and about 20% to mines. I think meidhl's figure of only 17 sunk by the IJN refers to sunk by IJN warships alone. I do know that quite a few were sunk by aircraft and warships working together. I don't know how many Dutch or British subs were sunk by the IJN and can't seem to find any consolidated source but I seem to remember in Morrison's "Rising Sun in the Pacific" the only Dutch ships that didn't have the little star indicating lost in action were the Dutch subs (and Tromp) so I guess the number of Dutch subs sunk was not too large. Haven't found any breakdown between Atlantic/Pacific for RN subs - just total of 75 (I think - what'd I do with that little post-it) but if the ratios are similar for cause of loss then it would seem that the IJN killed roughly 1 sub/mo with its ASW assets (excluding mines).

In conclusion Japanese ASW efforts did not protect their shipping very well at all and did not inflict particularly damaging losses on the Allies.
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

So is...

True. I've edited it for the sake of the thread.
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RE: IJN submarine losses 1941-1942

Post by UndercoverNotChickenSalad »

I've edited it for the sake of the thread.

mdiel caves [8|]
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RE: IJN submarine losses 1941-1942

Post by freeboy »

Ok, this is a strategy and tactics game and many figures thrown around should note that
A) The allies read the IJN and German ubout routing mail, used directional findings and did this well after 42. If we want to argue effectiveness, perhaps the OPTION to change intell from great to ok to randum with a coorisponding affect should be included?

I can see the developers rolling their eye, that was not a REAL suggestion, just trying to show there are MANY factors, mini factors, at work.[:-][:-]

B) Better asw research for the IJN as an option? sounds like the the air upgrade thread. Unlike todays subs, which are still very vulnerable, but fast and can go to unbeleivable depths, ww2 subs where fragile and slow and noisy and.. well they just were not good defensively.. o2, bateries etc...
The dedicated resource asw units should always have the upper hand, unless we really want to screw with history... and reality
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