. . "Underwater warfare of the future" . "Underwater warfare of the future"@en . . . . . "Juvenile works" . "Juvenile works"@en . "Electronic books"@en . "Discusses the submarine's role in warfare as well as other underwater weapons systems such as sonar, torpedoes, robots, specially trained marine mammals, and nonlethal weapons." . "Discusses the submarine's role in warfare as well as other underwater weapons systems such as sonar, torpedoes, robots, specially trained marine mammals, and nonlethal weapons."@en . . . . . . .