Fighting Undersea Commandos #2

Lieutenant Blane leads a U.S. Navy frogmen team on a covert underwater mission to penetrate enemy defenses, including cutting through an anti-submarine net and navigating past a machine gun nest guarding a tunnel entrance on a fortified island. After successfully completing their initial sabotage mission, naval command briefing reveals the need to locate and destroy enemy submarine bases, leading to the assignment of a new two-man submarine armed with electronic cannons for the frogmen to pilot on their next operation.