Tag Archives: Seawolf

Virginia Class Submarine Summary

ATI Courses is scheduled to present technical training short course Submarines and Anti-Submarine Warfare scheduled to be presented in Columbia, MD on June 21-23, 2011.  We think our readers would be interested in the information below.

Designed by Electric Boat, the Virginia-class is being built jointly under a teaming arrangement between Electric Boat and Northrop Grumman Newport News in Virginia. In 1998, the U.S. Navy awarded a $4.2 billion contract for the construction of the first four ships of the class. Virginia is the first of these. Displacing approximately 7,800 tons with a length of 370 feet, Virginia is longer but lighter than the previous Seawolf-class of submarines. The 132-member crew can launch Tomahawk land-attack missiles from 12 vertical launch system tubes and Mark 48 advanced capability torpedoes from four 21-inch torpedo tubes. Virginia will be able to attack targets ashore with accurate Tomahawk cruise missiles and conduct covert long-term surveillance of land areas, littoral waters or other sea forces. Other missions will conduct include anti-submarine and anti-ship warfare, special forces delivery & support, and mine delivery and minefield mapping. With enhanced communications connectivity, Virginia also will provide battle group & joint task force support, with full integration into carrier battle group operations. The Virginia-class submarines surpasses the performance of any current projected threat submarine, ensuring US undersea dominance well into the next century. The Virginia class (or SSN-774 class) of attack submarines are the first US subs to be designed for a broad spectrum of open-ocean and littoral missions around the world. They were designed as a cheaper alternative to the Cold War era Seawolf-class attack submarines, and are slated to replace aging Los Angeles class subs, seventeen of which have already been decommissioned. The Virginias incorporate several innovations. Instead of periscopes, the subs have a pair of extendable “photonics masts” outside the pressure hull. Each contains several high-resolution cameras with light-intensification and infrared sensors, an infrared laser rangefinder, and an integrated Electronic Support Measures (ESM) array. Signals from the masts’ sensors are transmitted through fiber optic data lines through signal processors to the control center. The subs also make use of pump-jet propulsors for quieter operations.

http://www.sublant.navy.mil/VirginiaClass.htm


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Watch The Video Of Australian Submarine NAVY Doing Live Torpedo Practice On Their Decommissioned Ship

ATI Courses is scheduled to present Submarines and Anti-Submarine Warfare course on June 21-23, 2011 in Columbia, MD.  We thought our blog readers will be interested in the the video below.

The video aboe was shot during Australian Submarine NAVY performing torpedo practice on one of their decommissioned ships.

Mark 48 torpedoes were used in this exercise.  The torpedo goes off directly underneath the keel of the ship.  The Stream Bubble from the explosion destroys the ship.

The Mk-48 torpedo was designed in the end of the 1960s to keep up with the advances in Soviet submarine technology. Operational since 1972, it replaced the MK-37 and MK-14 torpedoes as the principal weapon of U.S. Navy submarines. With the entry into service of the new Soviet Alfa class submarine in 1979, the decision was made to accelerate the ADCAP program, which would bring significant modifications to the torpedo. Tests were run to ensure that the weapon could keep on with the developments and the weapon was modified with improved acoustics and electronics. The new version of the weapon, also known as Mk-48 Mod 4, was extensively tested and production started in 1985, with entry into service in 1988. From then on, various upgrades have been added to the torpedo, of which the current version is the Mk-48 Mod 6, a mod 7 version was test fired in 2008 in the Rim of Pacific Naval exercises. The inventory of the US NAVY  is 1,046 Mk-48 torpedoes.

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, SeawolfLos Angeles and Virginia class attack submarines. It is also used on Canadian, Australian and Dutch submarines. The Royal Navy elected not to buy the Mark 48, preferring to use the Spearfish instead.

Mk-48 and Mk-48 ADCAP torpedoes can be guided from a submarine by wires attached to the torpedo. They can also use their own active or passivesensors to execute programmed target searches, acquisition and attack procedures. The torpedoes are 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.


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