10x starting points; press "b" key to recharge battery; "a" to refill air; "d" for full durability (repairing all damages); "f" to remove flood water; "x" to toggle x-rudder; "t" to toggle tiles (acoustic); "p" to get full polymer; "m" to get full masker; "s" to change screw (propeller) type; "h" to change hull shape; "e" to change main engine type; "i" to change auxiliary engine type; "1" to get m48 torpedoes; "2" to get m46 torpedoes; "3" to get decoy torpedoes. control the sub after you purchased its pieces. dive and surface as you launch torpedoes at enemies.
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