Leopard 2 tank with turret snorkel drives underwater.
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More: https://en.wikipedia.org/wiki/Deep_wading
Previously:
https://www.homemadetools.net/forum/...2519#post96514
https://www.homemadetools.net/forum/...1317#post74166
https://www.homemadetools.net/forum/...250#post116082
https://www.homemadetools.net/forum/...914#post119742
https://www.homemadetools.net/forum/...989#post125173
https://www.homemadetools.net/forum/...839#post133520