Torpedo, Underwater Mine
The Mk 46 is a lightweight torpedo featuring a conventional layout with the homing section and warhead in the nose, the fuel in the middle and the engine and control fins at the rear. It uses a passive and active sonar guidance system. The torpedo can be launched from many surface vessels, as well as various helicopters such as the SH-60 Seahawk. The Mk 46 is the most common lightweight torpedo in the world.
The Mk 48 torpedo is designed to be launched from submarine torpedo tubes. The weapon is carried by all U.S. Navy submarines, including Ohio-class ballistic missile submarines and Seawolf-, Los Angeles-, and Virginia-class attack submarines. The torpedoes can be guided from a submarine by wires attached to the torpedo. They can also use their own active or passive sensors to execute programmed target search, acquisition, and attack procedures. The torpedo is designed to detonate under the keel of a surface ship, breaking the ship's back and destroying its structural integrity. In the event of a miss, it can circle back for another attempt.
The Mk 50 is a lightweigh torpedo developed to counter the the most advanced Soviet-era submarines that were both more quiet and diving deeper than previous generations. It is a very expensive lightweight torpedo that is both very vast and able to dive very deep. Due to the complex design the development took much longer than anticipated and due to the cost only a limited number was produced. Its conventional layout is very similar to the older Mk 46 that served as the basis for the Mk 50 design.
The Mk 54 is a lighweight torpedo, which integrates existing torpedo hardware and software from the Mk 46, Mk 50 and Mk 48 torpedo programs with state-of-the-art commercial-off-the-shelf (COTS) digital signal-processing technology, resulting in a highly cost-effective weapon system. It combines the homing portion of the Mk 50 with the warhead and propulsion sections of the Mk 46, while it uses some software and computer hardware of the Mk 48 ADCAP. The torpedo features an advanced guidance and control (G&C) section and tactical software improvements which significantly increases its shallow water counter-countermeasure capability. It was previously known as the Lightweight Hybrid Torpedo (LHT).
The CAPTOR mine is an anti-submarine mine that is laid by aircraft, surface vessels or submarines. The name CAPTOR stands for Encapsulated Torpedo. The mine is moored to the sea floor and detects nearby vessels using passive sonar. It is designed to only engage submarines.
The Mk 67 Submarine Launched Mobile Mine (SLMM) was developed as a submarine deployed mine for use in areas inaccessible for other mine deployment techniques or for covert mining of hostile environments, in order to restrict ship and submarine traffic. The SLMM is a shallow water mine, consisting of a modified Mk 37 torpedo with a mine target detection device.
The Quickstrike is a family of shallow-water, aircraft-laid mines used against surface and subsurface craft. They have the capability of making arming-delay, sterilization, self-destruct, and other operational settings. The 500-pound and 1000-pound versions are basically conversions of the respective General Purpose Bomb bodies.