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Originally Posted by aaken
but the 214 has smaller underwater range on the AIP than the 212/212A (around 15 days at 5 kts against 25-28 days at same speed).
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Don't let you deceive by any official data. Its true capeabilities are much greater than what is being officialy admitted. It has been said that it actually can operate the entire patrol without snurkeling.
Many of the signatures are completely eliminated. It has been also stated that besides the little emissions it makes the 212 has a special new stealth technology that makes it undetectable but it hasn't been said what the nature of it is. At least the periscope cannot be detected on radar. This boat has gone completely steath.
This is the german sea wolf class if not even better. And btw on the 212 they fianlly use waterfall displays.
Concerning the steel I think the HY 80 was used for the 212.
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As for the only battery set used in 212, that's because there is not enogh space in the after part (the one with a smaller diameter)
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But you could also say that's because it has an AIP now so it is not anymore so dependant on batteries, hence they made it smaller and besides that this new batteries have surely a much higher capacity than thous on the older boats.