Comments by "Warren Cash" (@mandowarrior123) on "Missing Titanic submarine: Five things that may have gone wrong" video.

2 weeks after pearl harbour men were still banging on the inside of the battleship hull.
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 @EvelynElaineSmith *officially, navy subs don't. They're HIGHLY classified. They also have remote units that may or may not increase the operational depth.
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Okay, communication and detection only*** works by sound at depth. This is why submarines are so stealthy. Furthermore, below the thermal layer in the ocean sounds reflect off it. Thus, to even hear it requires special submarine hunting gear. It is very difficult to find even a massive military sub. As for outward signals, a decent active sonar ping is both dangerous to the occupants of a small sub and power intensive, ie kill you loud. ***only being mostly true relevant to here. Strictly speaking magnetic resonance and 'smell' also work (sea creatures got there first on all) but they aren't applicable here.
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Well if it is located a remote sub could bring it back absolutely. It's very classified that stuff though to the point it may not be worth revealing the capability.
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It lost contact in the descent. If it collapsed that isn't pilot error.
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What is that in football fields?
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 @antonitobendrito2243 many tonnes of cable you couldn't pull back up, and its a little late to build a rescue vessel.
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@zigman8550 Yes, and they still could not be rescued even in port. It wasn't even submerged fully. Truly heart wrenching and gruesome. They were about as slow deaths as possible for some. Each memorial day I give special thoughts to those men and those that had to listen and clean them up afterwards. The slight hope in this case was they had surfaced and drifted. Any form of rescue on that notice is very unlikely even despite the modern deep diving remote subs carried by submarines that possibly could lift a little vessel back up. Everyone worked hard, not just for the chance of success in this case, but also it is great practice for any sub emergencies that do have decent recovery chances.
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 @cydamonnstix8228 the body heat would likely be enough in such a craft.
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@rundattmedia2106 this isn't strictly true. Not with a simple cable practically speaking, but you could theoretically create a tether with buoyancy, it would probably need engines too to keep it from exerting too much force on the vessels from currents. Thoroughly impractical would be accurate.
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 @pepewr He was public about it.
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