A coastal submarine or littoral submarine is a small, maneuverable submarine with a shallow draft well suited to navigating coastal channels and harbors. Although size is not precisely defined, coastal submarines are larger than midget submarines, but smaller than sea-going submarines designed for longer patrols on the open ocean.
A coastal submarine or littoral submarine is a small, maneuverable submarine with a shallow draft well suited to navigating coastal channels and harbors. Although size is not precisely defined, coastal submarines are larger than midget submarines, but smaller than sea-going submarines designed for longer patrols on the open ocean.
Source: Wikipedia "Coastal submarine" · CC BY-SA 4.0
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