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** And even more believable because this exact issue is ''well'' known to the Navy, and is, among other reasons, why the Navy is still keenly interested in improving the SOSUS warning system. The Stingray's mission and tactics are, surprisingly, not that far off from current worries the U.S. Navy has about diesel/battery subs and nontraditional tactics. In one real life war game, the opposing force, run by an admiral with something of Dodge's attitude, defeated an entire battle group ... twice, as the umpires declared halfway through that all the ships he had "sunk" were now floating again.
*** That's because on a nuclear subs the cooling pumps of the reactor had to be on ''all the time'', lest it suffers a meltdown, and they create a fairly loud hum which can be an absolute bitch to isolate. Even in a newest reactors that can use a natural convection to sustain a low power levels without turning the pumps on, the rush of coolant through the tubes is loud enough to be a problem. Diesel sub, on the other hand, can turn off basically ''everything'', and the electric motors on a low power setting are virtually silent, so the only thing that could be heard from them are rush of water over the hull (basically non-existing on "creeping" speeds), and, indeed, [[Toilet Humor|a crewmen farts]].
*** Also, the wargame in question was most likely [https://web.archive.org/web/20070928005405/http://www.jfcom.mil/about/experiments/mc02.htm MC02], where General Van Riper did use unconventional methods to win, most notably motorcycle couriers, but also including cruise missiles launched from boats weighing less than the missiles. Additionally, the boats were "raised" because either the wargame ended early, wasting money, or the wargame ran on and they got good lessons. Also he assumed his motorcycle couriers could move at the same speed as radio traffic. See [https://web.archive.org/web/20190823150932/http://www.tboverse.us/HPCAFORUM/phpBB3/viewtopic.php?f=11&t=289here\%5C] for more detail into how exactly he cheated
** In fact, it happened already when, in 2006, a Chinese diesel sub went undetected by USS Kitty Hawk's battlegroup until it surfaced within torpedo range.
** It regularly happens during exercises and wargames too. For instance, ruring the exercise JTFEX / [[TMDI 99]] the Dutch "Walrus" diesel submarine "sank" a lot of American ships including an aircraft carrier, a command ship, a cruiser and several destroyers and frigates.