@Stingray the type two was from a time far removed when submarines where surface vessels with a hide and seek button. this designs have still some charm. its a bit depressing that only a hand full of them survived (deutsches museum munich has the u1 the first german submarine/ submersible and near kiel in laboe is a typ 7 in the c variant as a memorial. thats the only two submersibles i know that survived).

Thanks for all the background on the type II vessel. I just liked the old-fashioned rugged looks. Built and posted just for fun, this is a game after all. @Irobert55

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Thank you @LancasterAce

@Stingray also a small fun fact to end: the pressure vessel of the type XXI has the shape of an inverted eight with the batteries and probably some storage units and internal liquid storage in the smaller lower section.

@Stingray even better thats only the surface. the type VII that came before (and is the most produced submarine in its c variant) was the last submarine of german origin that had some of the crew bunks in the torpedo magazines. also wikipedia says that 6 type XXI did go on attack runs but i, when using the linked up bocklet can confirm only two of these runs but a guy called adalbert schnee that was comander of one of these runs encoutered allied convoys twice and wasnt detected. the type XXI is the reason why submarine detections isnt done with active sonar anymore (passive sonar is better against modern subs. the passive sonar of the type XXI is located in the big bulge under the bow and the ends of the two tubes towards the aft9).

OK I believe you, yopu have done your research. I can remove double-hull from the post description, may add that it is roughly based on the U-96 from Das Boot. @Irobert55

@Stingray actualy the type XXI was build by companies inland in sections and they where delivered to the warfs for final construction. the complete service history of the type XXI was from the 20th of april 1944 till the end of the war and it was porbably the fastest to build submarine ever (118 launched units in a year, around 150 finished until the war ended and around 170 total that where on the warfs or launched). the lack of succesfull kills stems from the fact that the type XXI required special torpedos.. and the allies had destryed the production plant in a luckshot. also every submarine that was developed afterwards uses tech that was spearheaded witht the XXI like submarine based sonar, anti sonar cloaking; rubber padded engine mounts, the use of the pressure vessel as a interim airtank to keep the engine alive when the snorkel is submerged and potentialy even a basic anti radar cloak for the snorkel head. the type XXI also spearheaded the modern submarine: every thing on it was optimized for underwater operation (ok it still was lacking a shower but it had a radar detector so thats a trade of) like the small fact that it was the first german submarine with a waste water tank (one of the alternatives was a high pressure toilet that could be flushed under water but testing ended when a comander sunk hus boat by accidet with it). also it was under water as fast as surfaced or with better words: the first real submarine (every sub before was only ment to dive to hide itself from the enemy but the type XXI was build to be there wich is reflected in the build of the conning tower with a comedicaly small bridge aand the AA guns in front and back of the tower).

small facts to take note: the bridge of the type XXI is directly behind the frontal AA tower and under the frontal AA gun is the small bulge of the nibelung sonar. the anti sonar matts are still going strong wich means that there are still type XXI on north- and baltic sea that cant be found due to the alberich skin called sonar protection.

speed is depending of the source the same above and under water or even faster when diving but i call up the qoute official source here link to the german bock page: the speed is 17,2 knotts (thats equivalent to 32 km/h) on the surface as well as diving when the snorkel is in use.

OK. Without using the unreliable Wikipedia, who built the XXI, where, and how long did it serve? @Irobert55

@Stingray the first real german two hulled sub that i know of is the type XXI.

Thx for clarifying, I never examined one of these, they were way before my time. Just repeating building guidelines provided by Friedrich Krupp Germaniawerf, the WWI-WWII company that also built the famous U-96, used in the movie Das Boot and the first Indiana Jones movie. Claims are the inner hull is not seen from the outside. Outer hull does contain the diving tanks. @Irobert55

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@Stingray uhm sorry to break the immersion: this is not a two hulled submarine. and neither a single hull submarine. its somewhat of a intermediate construction (the two big bulky things left and right are the diving tanks).

You're welcome@Stingray

Thanks for the upvote @Mk1990B. although at this point someone else's account seems to be getting the upvote points not me. Still investigating. Thx.

Thank you @WarHawk95

Thanks @nathanmagnus