The Atlantis Squid Class Heavy Scout is designed for reconnoissance and exploration. It's massive engines and four propellers give it an impressive rate of knots. At low speed most of the engine power can be directed to it's manipulatory arms. This enables it to shift debris and gives it a fearsome reputation for tearing apart other submersibles in close combat. However it fares badly at range having only four harpoons for ranged weapons. Environmental support is limited to the cockpit making long duration missions somewhat uncomfortable.
"Sooner or later tentacles get into everything" - Squid pilot saying.