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Each missile tube was a pressure vessel. You certainly don't want water in the tube while the missile is still in there, a recipe for corrosion.This Is also true of more conventional SSBNs, just that the "internal" tubes have to resist pressure the other direction when the tube fills with water at sea pressure after the missile is launched.
Each missile tube was a pressure vessel. You certainly don't want water in the tube while the missile is still in there, a recipe for corrosion.
This Is also true of more conventional SSBNs, just that the "internal" tubes have to resist pressure the other direction when the tube fills with water at sea pressure after the missile is launched.