3 ms·
They can pump water but it's noisy and when they don't move all the warm water they generate stay above them and they become easy to spot from the surface. Mean
by WastingMyTime89 5y ago
They can pump water but it's noisy and when they don't move all the warm water they generate stay above them and they become easy to spot from the surface. Meanwhile a diesel-electric sub can just stay on batteries and is then close to entierely silent.