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It was not just an influential design but also the production process, it beeing build in sections and then put together. This enables much more people working on it at the same time

One small correction: The primary way for checking for any ships was for frequent hydrophone checks. Meaning the sub would submerge for a selected time, the sub then running usually dead ahead (2kn usually for the Type VIIs) to keep own engine sounds low so the hydrophone operator could scan the surrounding area for any propeller noises and, depending on skill of the operator and available hydrophone (obv later ones were better) they could discern rough type, size and amount of porpeller noise. It also kept the crew trained (because you want your crew to be able to submerge the boat pretty quickly) and to scan a wide area surrounding the boat. Ofcourse another, semi-primary source of intel for shipping locations were sighting reports from other submarines, planes and other surface vessels. Germanys Naval Radar wasnt nearly as sophisticated as Allied ones AND early Radar equipped boats didnt have a form of Radar Warning Receiver so running radar was risky. And even then with RWRs is was still risky as it was basically a beacon for allied planes and ships late war alerting them to the presence of subs. So Radar was used sparringly to begin with. Hydrophone checks and sighting reports remained the main ways of aquiring potential targets.
I love german uboats and my personal fav being the Type IXs as they just look so sexy and are cool boats to begin with, but the Type XXI-class was really ahead of its time and many boats surviving the War were taken by basically all allied nations to be studied and reverse-engineered. In the case for the Soviets the Type XXI influenced their submarine designs up until the early 1960s. Which speaks volumes to the XXIs advanced design.

The 262 of the sea, the design altered all future development in their particular field.

By 1904 Admiral Fisher along with experts like Scott were of the opinion that the future belonged to the submarine rather than the gunned capital ship and by 1909 they had added aircraft to the idea

Great video man. And hey this channel will grow. That autoloading torpedo system on the type 21 is the system that the russians copy and used on their subs during the cold war( i cant remember if their boomers used a auto loading system too but it make sense they would since the soviets were all in on automatic systems for their subs to reduce crew size and they paid for it too in some cases if you research it! ) and still use a modern versions of to this day on their subs. Great video man keep up the killer work. Thank you

If i remember correctly, a modified version of the type 7 actually had a deeper recorded test depth than the type 21

the photo of the four "Puff Boats" at minute 18:02 includes my boat, the USS Blenny (SS324) as the boat at the lower left of the photo.  Each of these boats had those three sharkfin shaped sonar mounts for their passive sonar.  I served and qualified on Blenny 1968-1969.  That passive sonar could accurately locate a target submerged at ten miles.  We and the others had the high Atlantic sail, which helped us lookouts keep our feet dry, most of the time.  Average wave height during the winter in the North Atlantic was 30-footers.

Videos like this are my just my jam

Presentation well done!

Imagine 200 of those in 41.

Didn't know Cone had gone naval. Subscribed straight away.

Awesome documentary on the history of submarines. Truly enjoyed it!

Great video. Thank you!

Always been very interested in this subject thank you for❤❤❤

1:02 That photo was actually taken in Scotland just after Germany surrendered. That is a Royal Navy crew onboard. Check out the flag.

Thank you for a great video, into late WW2 submarine design. It is definitely a subject I must read more about.

You know when you randomly find a peak youtube video and realize that the channel has a bunch of the peak videos and you watch all of the videos, yeah im having that.

Great video!

Requesting a video on USS Albacore