Allied ASW

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anarchyintheuk
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RE: IJN submarine losses 1941-1942

Post by anarchyintheuk »

ORIGINAL: Charles_22
ORIGINAL: mdiehl
Seems pretty lax to me.


Then you'll have to be more specific as to who or what aspect was "lax." If your argument is that there weren't enough escort class ships and that 'expenditures for escort ship construction were lax' then fine. That's a fair remark. The DDs were on the way but there simply weren't enough of them to go around as I've agreed numerous times.

But if "laxity" is supposed to apply to the level of training and skill pre-war or, as AM suggests, throughout 1942, that'd be manifestly wrong. It is quite true to point out that the state of the art of ASW in Dec 1941 1stQ 1942 was not so compelling and that subs had the advantage. But USN/USCG escorts were quite skilled. There were some substantial organizational changes that had to be made in early 1942 to give US escort groups better CAC. Starting in February 1942 the USCG 327s (for example Campbell) and 265s (for example Modoc) were sent for month-long refits (addition of Sonar/asdic for escorts that lacked same, in the 327s, addition of DC racks to those not yet equipped with same, addition of 6x K-guns -- 3 port 3 starboard) and, importantly, a kind of "advanced ASW school" training for skippers and XOs under Royal Navy tutelage. So the assertion that UK advice and knowledge was across-the-board spurned is pretty suspect. As with most blanket generalizations, the truth is more complex and less overstated than the propaganda.

See, for example:
Walling, Michael
2005 Bloodstained Sea. McGraw Hill. ISBN: 0071424016

One thing that catches my eye is the ease with which escorts are getting torpedoed. If there's a kernel of truth to the breast gashing going on, it's that the overall intensity of submarine and anti-submarine activity seems too high. Subs make contact too easily, get off accurate shots too easily, and as a result are getting counterattacked often.

Let me remind you of your erroneous, or mis-stated view:
quote:

I think the supposition of a pre-war "lax" mentality is wrong from the get go. ASW was one of the things that RN, the USN, USCG, RAN and RCN took quite seriously. It was an area in which the Allies pre-war excelled and far outdid any of the Axis players.

The subject is pre-war, not 1942. Have I not provided sufficient evidence that PRE-WAR it was lax? The British, the supposed masters, were having to live with the results of that lax approach quite a while before '42 came.

I don't lump lack of ASW ships as necessarily lax, though it's certainly a symptom, but more the obvious ones of virtually untrained crews and that nobody bothered to learn the convoy lessons of WWI. You spoke of pre-war as though they were doing some 'really serious' work. but it sure didn't pay off in what was possibly the 3 most critical areas, things the military ITSELF could control (though I blame the military for only two of them), such as training crews and keeping the WWI convoy lessons in mind. The military couldn't control how much ships they were alloted.

And now a few interesting quotes form Submarines at War by Edwin P. Hoyt

page 109 somewhat into the last paragraph:
The plunger was also the first U.S. undersea boat to undergo a really arduous depth-charging and survive. In the waters off Japan she was attacked by a Japanese destroyer whose crew showed they knew a lot more about antisubmarine warafre than the Americans did at that stage of the war. The destroyer dropped twenty-four depth charges on the Plunger, one so close that it broke open the alcohol tank in the after torpedo room. The Japanese did not have American sonar but they did have their own echo-ranging system, which was accuarte to 3,000 meters. The old-fashioned hydrophones were able to obtain a bearing at 5,000 meters.

Page 184 which earlier mentioned early '43:
The Japanese had radar. It was not yet installed on ships and warships, but it was coming. They were adept at the use of radio direction finders. The submarine that came to the surface and made a long transmission to Pearl Harbor might find that it had raised a nest of hornets. The Japanese had another device not duplicated in the United States, the jikitanchiki, a magnetic detector used by Japanese aircraft. It sensed the presence of a large metal object below the surface of the sea, so that low-flying pilots could sometimes find and then track a submarine that was submerged.

However, at this stage of the war the major Japanese anti-submarine weapon was the sonar system. The Japanese sonar was technically superior and their employment of the echo-ranging techniques was excellent. Also, as the war continued, more Japanese merchant ships were armed with deck guns that were a constant threat to any submarine trying to attack on the surface.

Most important at this stage of the war was the increase in Japanese production in antisubmarine vessels. The most effective of these were the kaibokans. These vessels were small, under one thousand tons. At first the Americans thought they were only coastal freighters but they carried highly trained antisubmarine personnel, and three hundred depth charges were a standard allotment.

BTW, my grand campaign as JA is on about 12/17 now, and I remember accelerating two destroyers with the heavier depth charge loads and the first CL that had a radar set. I thought my earliest warship was coming in like 30 days at least, and unaccelerated the CL I picked was either 80 or 120 days at best, and yet I just got one, maybe not the same one, in Tokyo. Did I just miss it or are accelerations supposed to be that radical (it may had been accelerated for a week)?

No offense to Hoyt but if they were this good why did their merchant marine get the shite kicked out of them?
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RE: Allied ASW

Post by Ron Saueracker »

ORIGINAL: pad152

One thing I think is still realistic is the fact that every ship in a TF gets to attack a sub, this should be limited to 1 or 2.

Especially if the ships are moving over multiple hexes where subs are in a line...all the subs have the posibility to engage in combat/be subjected to ASW, with no apparent effect on movement.
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RE: IJN submarine losses 1941-1942

Post by Ron Saueracker »

ORIGINAL: mdiehl
The first German submarine sunk by an escort was nailed by Campbell in late January 1942 in a first pass dc run.


Not another guy who believes WW2 started on Dec 7th, 1941!!!?[8|][;)]
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RE: IJN submarine losses 1941-1942

Post by Ron Saueracker »

ORIGINAL: Bobthehatchit

Another thing i feel need to be taken into account when looking at subs lost to asw attacks is the amount of time subs now spend at sea compared to there actual historical deployments.

After reading Tromps info for a lot of subs on hazy grays and underway's site, i noticed that in general most subs would do one maybe to two patrols between refits which could last anything from a week to a few months, there would then be a period of crew training and working up before the sub went out for one or two more patrols.

In UV and Witp subs are generally used a lot more than this, they patrol, refuel/re-arm go straight back out again unless damaged. They will some times spend a few day in port if the sis is up then sortie again. So in general there are more subs at sea for longer being used more aggressively against asw tactics that arn't always historical.

In general the IJN and Usn did not depluy asw HK groups with ten DD's against a SS sighting like alot of players do. The Ijn mostly used PC'S PG'S SC and aircraft, the DD's were to busy carrying out other duties. It wasn't until later in the war the dedicater asw groups were deployed to the pacific by the USN and RN, generally based around a cve with dd and de's as support.

Just my two pence worth.

Agreed.
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RE: IJN submarine losses 1941-1942

Post by Ron Saueracker »

ORIGINAL: mdiehl

By month, with cause of loss in parentheses.

December 1941: I-6 (SBDs from VS-6, USS Enterprise).
January 1942: I-60 (HMS Jupiter), I-73 (USS Gudgeon [SS-211]), I-124 (HMAS Deloraine).
February 1942: I-23 (missing, presumed lost, south of Oahu).
May 1942: I-28 (USS Tautog [SS-199]), I-64 (USS Triton [SS-201]).
August 1942: I-123 (USS Grable [DM-15]), RO-33 (HMAS Arunta).
October 1942: I-22 (missing, presumed lost, Guadalcanal), I-30 (struck mine).
November 1942: I-15 (USS Southard [DMS-10]), I-17 (probably to PBY-5 from VP-11).
December 1942: I-3 (torpedoed by US PT boats), I-4 (USS Seadragon [SS-194]).

So the Japanese lost almost as many submarines to enemy action (discount the mined sub I-30, and the I-22 and I-23 and you are left with 12 subs lost to direct action) in 1942 as the US lost to Japanese action in the entire war. Interestingly, one MIGHT quibble about Allied ASW success in killing Japanese subs, depending on how the subs are deployed and what they're up against. The US "secret weapon" in 1942 seems to be US submarines.


Mike Wood is looking into Sub vs Sub combat, if any are interested. Considering how effective subs were in killing their own kind in WW2, this is most welcome.

I'm also hoping some severe limit as to how many ASW ships per TF actually get to attack a sub (vs those maintaining station with their TF to protect their charges) is given a second look. Would go along way in reducing the apparent excessive Allied accuracy and curb these ridiculous 25 + ship ASW TFs people are using. Blows me away when people quote historical loss rates etc yet utilize forces in such ahistorical manners. (Not saying you do Mdiel, but many do).
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RE: IJN submarine losses 1941-1942

Post by Ron Saueracker »

ORIGINAL: mdiehl

That's not my position. My position that Allied ASW (and to a certain extent, German submarine tactics) evolved dynamically. Allied ASW was, however, far more developed and effective even in 1939 (here we'd be talking about the UK) than, for example, Japanese or German ASW. The Japanese had NO experience with ASW and frankly a suite pf pervasive attitude problems that was a barrier to its effective use. The Germans had plenty of theory but little training largely because they weren't allowed to even build submarines and did not do so for most of the interwar period. So, for example, the idea of using a German torpedo boat in ASW exercises against a German submarine acting as a training target was right out. Of all the Axis powers, in 1941-1942 the Italians were the most rigorously and realistically trained in ASW.

As I said. In 1941 the advantage lay withe the submarine. As others, however, have pointed out, there were qualifyong circumstances (training, tactics, construction and doctrine) that made some submarines both more effective and less vulnerable than others. Other than S-boats, the US and UK subs were as good as anything built by the Germans. The larger Japanese subs had remarkable endurance, but were rather vulnerable, not rated to the same submerged depths, and slower to dive. That last one is a huge factor. When the PBY is bearing down on you, emergency dive success or failure could be determined by a 90 second dive vs a 100 second dive.

Speaking of shooting from the hip. Your take on the Italians I hope is very relative (to poor IJN and KM ASW). Hell, the majority of Italian escorts were without active sonar throughout their relatively brief involvement in the six year war. They only had passive means of listening for sound. Pretty limited at best. Japan was better off in my opinion and they did not have the luxury of combating subs in the wading pool known as the Mediterranean. Many subs were lost to aircraft which could spot a sub submerged the water was so shallow.
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RE: IJN submarine losses 1941-1942

Post by Bobthehatchit »

ORIGINAL: Ron Saueracker
ORIGINAL: Bobthehatchit

Another thing i feel need to be taken into account when looking at subs lost to asw attacks is the amount of time subs now spend at sea compared to there actual historical deployments.

After reading Tromps info for a lot of subs on hazy grays and underway's site, i noticed that in general most subs would do one maybe to two patrols between refits which could last anything from a week to a few months, there would then be a period of crew training and working up before the sub went out for one or two more patrols.

In UV and Witp subs are generally used a lot more than this, they patrol, refuel/re-arm go straight back out again unless damaged. They will some times spend a few day in port if the sis is up then sortie again. So in general there are more subs at sea for longer being used more aggressively against asw tactics that arn't always historical.

In general the IJN and Usn did not depluy asw HK groups with ten DD's against a SS sighting like alot of players do. The Ijn mostly used PC'S PG'S SC and aircraft, the DD's were to busy carrying out other duties. It wasn't until later in the war the dedicater asw groups were deployed to the pacific by the USN and RN, generally based around a cve with dd and de's as support.

Just my two pence worth.

Agreed.

Thanks! Sorry about the dodgy spelling.

In two weeks of game play in Sen15 (as Allies) i have sunk 3 Ijn subs but only after they attacked surface combat TF's, the asw tf's I have out have hit and found nothing. I have lost 4 subs, 1RN, 1 Dutch, 2 USN to what appeared to be asw tf in the seas around PI, with several others damaged buy air attacks or driven down by asw tfs with out getting a shot off.

Seems fairly accurate to me.

Had a us sub engage a transport last night miss with first set of torps, engage with the deck gun then get a 1 torp hit from the second set of torps launched! So event he mk14's are working true to form.[8|]
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RE: IJN submarine losses 1941-1942

Post by Rainerle »

ORIGINAL: Ron Saueracker

Speaking of shooting from the hip. Your take on the Italians I hope is very relative (to poor IJN and KM ASW). Hell, the majority of Italian escorts were without active sonar throughout their relatively brief involvement in the six year war. They only had passive means of listening for sound. Pretty limited at best. Japan was better off in my opinion and they did not have the luxury of combating subs in the wading pool known as the Mediterranean. Many subs were lost to aircraft which could spot a sub submerged the water was so shallow.
Hi,
actually the med is small but not shallow at all
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

Ron -

In re Campbell. No, the war didn't start on 7 Dec 1941. We were, I thought, talking about alleged training laxity/asw operator/crew quality in the USN not the RN. The USN made some attacks prior to 7 Dec, and even some close hits, but no kills. (Of course, Campbell is not properly USN as her crew was USCG under the command and control of the USN.) But there's two conversations happening here maybe. There's the unterGoebbels propaganda about how the Allies, especially the US, sucked in all arenas of combat arms and lost WW2, and there seems to be some more general notion of "pre-war" USN laxity whose adherents seem unwilling or unable to specify in more precise terms what they're talking about. There may even be some in the lurk who think the UK/Commonwealth navies were lax. I don't buy it. My take is that with the Wallies the 1939-mid-1942 ASW technology, while "state of the art" wasn't good enough to rip the initiative away from submarines. If that's "lax" then every navy on the planet was "lax" in re ASW. Unlike the Axis powers, however, the Wallies had the kernel of skill in training with the equipment that they had to register submarine kills regularly (although not at the pace seen after May 1943) and upon which a real 1st class sub-killing capability could be developed.

Yes, my comments about the Italian ASW capability was solely in comparison with the other Axis powers. Italy, like Japan, was heavily dependent on merchant commerce so both trained at it to a degree though not as extensively as the wallies.
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RE: IJN submarine losses 1941-1942

Post by Charles2222 »

Maybe because the merchant marine was unescorted quite a bit (just a guess)?

I think you guys are focusing on the wrong part of the comment, though that's the reaction I had at first. Naturally it's more common to think that that particular destroyer was your average ASW for JA and that such a run was typical. He doesn't necessarily conclude that. I'm thinking he's saying that the US ASW wasn't all that good, and that this crew's performance was better than the typical performance of the US ASW. It is poignant too to note that the sub 'got away', which doesn't reflect too well on US ASW therefore since it's compared to that JA destroyer.

I recall some peopel had an issue with US subs seeming to have herculean abilitites to be heavily damaged and still get away and go for long distances to safety in port. The comment that the Plunger was the first to survive a heavy DC'ing ought to be food for thought on that issue.
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RE: IJN submarine losses 1941-1942

Post by anarchyintheuk »

Same reason the us had so many sinkings of merchants on the east coast in the first half of '42, a command decision (i hate that show) to have them sail unescorted. Those decisions have a great effect on determining the relative effectiveness of one side's tactics vs. another's. The part of the comment i was focusing on was Hoyt taking one failed ijn attack on a us sub and concluding that that sub knew more than the entire usn about asw. I guess i'll have to read it in context sometime.
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

Maybe because the merchant marine was unescorted quite a bit (just a guess)?

I think you guys are focusing on the wrong part of the comment, though that's the reaction I had at first. Naturally it's more common to think that that particular destroyer was your average ASW for JA and that such a run was typical. He doesn't necessarily conclude that. I'm thinking he's saying that the US ASW wasn't all that good, and that this crew's performance was better than the typical performance of the US ASW.

That would be an incorrect claim. Once can find numerous instances in 1942 os USN escorts making a highly successful initial DC run and killing the German or Japanese target. The US sank more subs in 1942 than the Japanese sank during the entire course of the war.
It is poignant too to note that the sub 'got away', which doesn't reflect too well on US ASW therefore since it's compared to that JA destroyer.

It's less poingnat than it is a non-sequitur. Well built submarines sometimes escaped despite heavy initial damage. It is, well, unusual to imagine that a Japanese escort that failed to get a kill reflects poorly on USN escorts. It's only plausible if one sets out with the assumption that the IJN escort was better than most USN escorts... an assumption that is not warranted by any data. There are far more points of comparison in which USN escorts in 1942, sans lots of combat experiecne, delivered devastating attacks, than there are Japanese ones.
I recall some peopel had an issue with US subs seeming to have herculean abilitites to be heavily damaged and still get away and go for long distances to safety in port. The comment that the Plunger was the first to survive a heavy DC'ing ought to be food for thought on that issue.

Yes, US boats were quite robust. For the most part Ileave off the cruiser subs and the S-boats) as good as anything in the German fleet save the Type XXns.

For ex:

German Type IXC/40: test depth 100m, max emergency depth 230m. Max underwater speed 7.3 knots.

US Balao class: test depth 300 feet, max emergency depth 600 ft. Max underwater speed 8.75 knots.

The German boats have slightly better officially sanctioned depths. Both classes survived emergency dives as deep as 700 feet. The Balaos had more tubes and better underwater max speed.
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RE: IJN submarine losses 1941-1942

Post by Charles2222 »

ORIGINAL: mdiehl
Maybe because the merchant marine was unescorted quite a bit (just a guess)?

I think you guys are focusing on the wrong part of the comment, though that's the reaction I had at first. Naturally it's more common to think that that particular destroyer was your average ASW for JA and that such a run was typical. He doesn't necessarily conclude that. I'm thinking he's saying that the US ASW wasn't all that good, and that this crew's performance was better than the typical performance of the US ASW.

That would be an incorrect claim. Once can find numerous instances in 1942 os USN escorts making a highly successful initial DC run and killing the German or Japanese target. The US sank more subs in 1942 than the Japanese sank during the entire course of the war.
It is poignant too to note that the sub 'got away', which doesn't reflect too well on US ASW therefore since it's compared to that JA destroyer.

It's less poingnat than it is a non-sequitur. Well built submarines sometimes escaped despite heavy initial damage. It is, well, unusual to imagine that a Japanese escort that failed to get a kill reflects poorly on USN escorts. It's only plausible if one sets out with the assumption that the IJN escort was better than most USN escorts... an assumption that is not warranted by any data. There are far more points of comparison in which USN escorts in 1942, sans lots of combat experiecne, delivered devastating attacks, than there are Japanese ones.
I recall some peopel had an issue with US subs seeming to have herculean abilitites to be heavily damaged and still get away and go for long distances to safety in port. The comment that the Plunger was the first to survive a heavy DC'ing ought to be food for thought on that issue.

Yes, US boats were quite robust. For the most part Ileave off the cruiser subs and the S-boats) as good as anything in the German fleet save the Type XXns.

For ex:

German Type IXC/40: test depth 100m, max emergency depth 230m. Max underwater speed 7.3 knots.

US Balao class: test depth 300 feet, max emergency depth 600 ft. Max underwater speed 8.75 knots.

The German boats have slightly better officially sanctioned depths. Both classes survived emergency dives as deep as 700 feet. The Balaos had more tubes and better underwater max speed.

Maybe, just maybe the author was looking at the US ASW performance as a whole and not concluding that they were giant killers for a few isolated successes. The author is commenting either one of two possible things a) That the JA ASW was more capable than the US military let on, so horrendously underestimating them that they would not think a JA destroyer was capable of such things, or b) The US ASW wasn't as good as they claimed, overall.

You'll note that he isn't comparing isolated incidents to isolated incidents. I mean, afterall, the author surely knows of the ASW around PH that you keep toting, and yet since those were sinkings, and this was not, he's obviously onto a more general theme. In short, if the US ASW was so good, then there would've been a LOT more sub sinkings, whereas, also to say, that if the JA ASW was so bad, it never would've been able to pull off that attack. I think it is his way of saying that the one battle emphasized that the US underestimated JA ASW ability, while overestimated it's own ASW. The fact that the US vastly overrated their sub torpedoes and then virtually ignored it for so long, seems to be more fuel for the fire (which the book largely deals with).
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RE: IJN submarine losses 1941-1942

Post by Brausepaul »

ORIGINAL: mdiehl
...For ex:

German Type IXC/40: test depth 100m, max emergency depth 230m. Max underwater speed 7.3 knots.

US Balao class: test depth 300 feet, max emergency depth 600 ft. Max underwater speed 8.75 knots.
...
The Balaos had more tubes and better underwater max speed...

The maximum underwater speed is more or less irrelevant since it is of no value during dive. Both subs couldn't maintain that speed for a long time due to battery capacity, and quick rushes were too quick to reach the maximum speed.
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

Maybe, just maybe the author was looking at the US ASW performance as a whole and not concluding that they were giant killers for a few isolated successes. The author is commenting either one of two possible things a) That the JA ASW was more capable than the US military let on, so horrendously underestimating them that they would not think a JA destroyer was capable of such things, or b) The US ASW wasn't as good as they claimed, overall.

Well, WERE that his conclusion he'd be arguing against a straw man, because there are no studies that suggest that the USN in 1942 were unstoppable giant killers. But we can look at the results produced, with or without Hoyt, much less second guessing his intent. The USN sank more submarines in 1942 than the Japanese sank during the entire war. Repeat: more in 1942 than Japan during the entire war. Given how heavily the S-class boats were used in 1941-1942, how poor their engines were, their riveted construction, shallow rated dive depth (100'), slow underwater speed, and the fact that they operated for four months well within the patrol range of many Japanese a.c, it is interesting that more S-class subs were lost to grounding than to any form of Japanese ASW.
You'll note that he isn't comparing isolated incidents to isolated incidents. I mean, afterall, the author surely knows of the ASW around PH that you keep toting, and yet since those were sinkings, and this was not, he's obviously onto a more general theme.

Or, alternatively, you're "reading him wrong." If you are representing him correctly than I do indeed doubt whether or not he knows wtf about USN ASW in 1942. Of course, Hoyt has emphasized the PTO not the ETO so he may indeed not know wtf about the average level of USN capability. 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.
In short, if the US ASW was so good, then there would've been a LOT more sub sinkings, whereas, also to say, that if the JA ASW was so bad, it never would've been able to pull off that attack.

I think that's a straw man. If you define extreme expectations to be the norm and then go fishing to prove that extreme expectations weren't met then you might come to that conclusion. If you look at what, exactly, USN and IJN escorts routinely DID achieve you find that the USN was indeed no giant killer in 1942, but still did substantially better than the Japanese shot per shot, convoy per convoy.
I think it is his way of saying that the one battle emphasized that the US underestimated JA ASW ability, while overestimated it's own ASW. The fact that the US vastly overrated their sub torpedoes and then virtually ignored it for so long, seems to be more fuel for the fire (which the book largely deals with).


That'd be poor logic as well. If "overestimating your own capability" in one area is supposed to be symptomatic in all areas, then one would conclude that no one in the Japanese navy could do much of anything, given the many and egregious ways that they overestimated their own capability throughout 1942.
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RE: IJN submarine losses 1941-1942

Post by mdiehl »

The maximum underwater speed is more or less irrelevant since it is of no value during dive. Both subs couldn't maintain that speed for a long time due to battery capacity, and quick rushes were too quick to reach the maximum speed.

You are incorrect. The maximum underwater speed is very relevant. It is a general statement of the boat's thrust to inertia/resistence. This makes all the difference when the ASW asset speeds up in preparation to dropping dcs on you. The usual sub practice was to cruise at modest speed (while continuing to increase depth), then go to full power and excecute a hard turn as the escort (which could be heard using hydrophones) accelarated for its attack run. A faster sub gets through more of a turn and opens up more distance from the point of attack than a slower sub. And in DC attacks, distance is what you need.

It's no value during the moment of execution of a crash dive before you switch to batteries. Highly valuable once you are underwater.
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RE: IJN submarine losses 1941-1942

Post by tsimmonds »

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.
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RE: IJN submarine losses 1941-1942

Post by Adnan Meshuggi »

as allways you look for your best comparisations...right ?
the IXers were LARGE subs... the germans produced som of them, but mostly they produced the VIIer-subs... here mostly the VIIc.

The LARGE american subs couldn´t crashdive so fast as the SMALLER german sub could, it could not dive so deep (geramn VIIc test dive 160m (that is for the imperial system around 510 feet) and an emergency deep of 300 meters
This subs were developted around 1940-41..)

the american 1944-45 subs should be compared to the 1944-45 german subs... here they suck, if you just compare the facts.

the XXIer had a test dive of 200 meters and a emergency deep of 450 meters
these subs were fast but not as fast as everybody could read.... they made realistic around 14-15knots, the advantage was that they could crashdive faster as any other "large= normal highsea)sub...
the snorkel made em - like the later "old" subs nearly invisable compared to conventional subs without the snorkel (like all non-netherlendish ww2-subs of the allies)

if you have a large sub, a hit chance is larger (i hope even you can recognize it), its manouverability is slower and if it is a near hit, the forces that could create damage as more impact to the sub.
So, no, american subs weren´t robust compared to their german counterparts.
The fact is, american subs had no such asw to counter... And i agree, if in this game the american subs would die like flies something would be utterly wrong. But - not for the "superior" quality of american subs but the lack of japanese asw.... and american radar... american subs could avoid the fight with japanese ships by oversea running (the american subs were fast on the surface)

If american subs had to encouter british asw, they had died like flies... too large, too slow and not agile they had been perfect targets...

if we also see american torpedos (even worser as the german G7e model in 1940-41) they have no supremacy....

so, if the japanese player use heavy air- and asw methods, american subs should die as quick as japanese and if damaged heavily they should die. This is my request. But i also think that american subs should be harder to detect and to find. So, if realistic use of air- and asw-groups by the japanese will happen, they are nearly save... untill they try to kill ships in shallow waters and a lot asw-capable ships in the near.

The problem is that in the moment the american sub is hard to find, is hard to damage and if damaged it is hard to finish it by the damage... for any sub should be true: if it is a hit and this hit damage the structure and the sub is under water, it is dead... or forced to try it home surfaced.... untill you show the evidence that the average american sub that was damaged heavily escaped untouched dived... but you can´t.

Also remember that i said, that the subs survive too heavy damages... not that the german subs were überboote (even if the average german VIIer sub survived more damage as an american sub, at last if we look into history... but to be fair (a word you should look in a dictionary), american subs had not to encounter much damages... cause they got only "light" dc-attacks... that was their HUGE luck. But is nothing to reduce the bravery of the american sub crews... it wasn´t their fault that their subs were - with the exception of radar equippment (that was quite superior) just average.

So, an american sub before equipped with radar trying to escape in shallow water should be as dead as any other sub in such situation. American subs had no superior defence system or something that could absorb damages better... cause of their size they had lesser survive capabilities...

oh, every sub (beside the walters and the e-boats) was dead meat in the sea if detected and hunted. ONLY these subs had the capability to escape the following trawlers...

for the training aspect. Just crap, cause you can train all the day, if you train false it is not good but bad to train. American asw lacked anything COMPARED to the experience of the british (including all other commenwealth nations) crews...

if you want to take USS England as an evidence, you also could take Wittmann as the average german tanker... but wait, Wittmanns records are all false or wet axis fanboydreams... a lie or not true... right ? Your best quotes are "Hartmann just shot down a lot transporters", "i have not much knowledge about the ETO", "P40 should be superior to the Zero", "Missouri against Yamato should be a turkey shoot in 999 of 1000 duells", " A game that reflect midway not in 99 out of 100 battles is crap", "If the game does not forbid torpedo attacks at the second row in pearl it sucks and has to be delayed untill this is corrected"... oh man... it is soo funny

Oh, i still wait for the answer to the question about american subs used historically, lying in harbor to refit and repair 2 days for one day at sea and your behaviour to do the same.... as the great historical freak....[:D]
Don't tickle yourself with some moralist crap thinking we have some sort of obligation to help these people. We're there for our self-interest, and anything we do to be 'nice' should be considered a courtesy dweebespit
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Fallschirmjager
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Joined: Mon Mar 18, 2002 12:46 am
Location: Chattanooga, Tennessee

RE: IJN submarine losses 1941-1942

Post by Fallschirmjager »

Can someone catch me up on the argument?

I still find Allied ASW overpowered.
If you want ask 2nd ACR what he thinks about it. We are playing a full camapaign and its 12/18/41 and I have sank 6 of his sub and a 7th isnt going to make it back to port.

I have sank them all in deep water. 80% is sank with dedicated ASW groups getting in the first shot.

I am way ahead of the historical pace. I am either using ahistorical tactics or ASW is too powerful. I am seeing the same things in my other PBEM games.
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Brausepaul
Posts: 484
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Location: Braunschweig, Deutschland

RE: IJN submarine losses 1941-1942

Post by Brausepaul »

ORIGINAL: mdiehl
You are incorrect. The maximum underwater speed is very relevant. It is a general statement of the boat's thrust to inertia/resistence. This makes all the difference when the ASW asset speeds up in preparation to dropping dcs on you. The usual sub practice was to cruise at modest speed (while continuing to increase depth), then go to full power and excecute a hard turn as the escort (which could be heard using hydrophones) accelarated for its attack run. A faster sub gets through more of a turn and opens up more distance from the point of attack than a slower sub. And in DC attacks, distance is what you need.

It's no value during the moment of execution of a crash dive before you switch to batteries. Highly valuable once you are underwater.

But the maximum speed doesn't say anything about the acceleration per se, and it's the acceleration which brings the sub out of the depth charge's reach. Of course you will sooner or later reach your maximum speed, but not in the short amount of time you have for the evasive maneuver.
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