The Submarine Boys on Duty / Life on a Diving Torpedo Boat

Two enterprising teenage friends sign on to serve aboard a diving torpedo boat and become embroiled in engineering trials, covert sabotage, and high-sea danger. They detect attempts to disable critical fittings, outwit a resentful ex-worker, and assist the inventor and crew in repairing damage and tightening security. Episodes alternate between shipyard scenes, tense submerged operations, and observations from the conning tower, yielding narrow escapes, investigative breakthroughs, and a revenge subplot. The narrative culminates in decisive dives and a final resolution that uncovers the mystery and restores safety to the vessel and its company.