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In the past I saw articles about submersibles being towed behind what appeared to be sport fishers or pleasure craft. In case of detection they would just cut it loose. When the feds caught on, the push for "self-propelled" was on. Semi-submersibles are much easier to build than subs.
Way back I read than some South Americans bought a couple of surplus Soviet subs, but haven't heard any more about it.
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The descent of man ~ Nixon, Friedman, Reagan, Trump.
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