yep, the s-class boats were leftovers from WW! and in reality were supposed to be scrapped but when pearl harbor happened we were caught unprepared and so they were put to use even though 50% of them sank just from mechanical or structural failures and not by the enemy. they were in fact death traps and it was "almost" suicidal to sail in them. they were too leaky, too old, too slow, to lightly armored, too limited in range, too limited in torpedos they can carry, too limited in battery life and underwater range and took damn near all day to recharge the batteries so crews often only ran submerged when absolutely needed and had to recharge batteries at night or in bad weather and pray they weren't spotted doing it.
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