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Well batteries have been used in submarines almost forever, diesel engines are noisy and require a lot of oxygen. So submarines use the diesel engines to charge the batteries, and when they need to be stealthy they switch to running on batteries.Noise is so important in submarines that the sailers/ submariners wear soft slippers, because their foot steps might be detected by enemy listening devices.
Well batteries have been used in submarines almost forever, diesel engines are noisy and require a lot of oxygen. So submarines use the diesel engines to charge the batteries, and when they need to be stealthy they switch to running on batteries.
Noise is so important in submarines that the sailers/ submariners wear soft slippers, because their foot steps might be detected by enemy listening devices.
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