Submariner Oolie (Insiders Only)

In submarine lingo an oolie is a difficult question not pertaining to one's normal duties. source
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Oolies have been part of continuing, informal cross-training techniques to keep submariners mentally alert, even after qualification. Astronauts, by the way, use the same technique.
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USS Dogfish (SS-350) had an historical connection with the late, great Eugene Bennett Fluckey (1913 – 2007), U.S. Navy submarine commander, and recipient of the Medal of Honor for his service in WWII.

In August 1945, Fluckey was ordered to Groton, Connecticut, to fit out new construction (USS Dogfish) and become its CO. Fluckey was instead promoted to the Office of the Secretary of the Navy to work directly for James V. Forrestal, and in 1945, was selected as personal aide by incoming CNO Fleet Admiral Chester W. Nimitz.

At age 85, RADM Fluckey, USN (Ret.) left a Message to Today's Submariners.
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After RADM Fluckey's death, the Dogfish Head Craft Brewery Inc, of Delaware, an American treasure, commemorated him in 2009, with its Admiral Fluckey's Lager.

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While Fluckey's Lager has not been available (legal impediment on use of RADM's name?), the brewer offers craft brew products that are amazing. Their traditional Peruvian beer Chicha, for example. Bet even ex-submariner Gus Van Horn has not tried Dogfish Head Chicha, yet, either!

Submarines are always silent and strange.