SNA class Los Angeles

The first Los Angeles-class nuclear attack submarine (SSN) entered service in 1976; 33 units of this type are in Command. This class follows the experimentation done with the Glenard P. Lipscomb (SSN-685), built between 1971 and 1974, and is much larger than previous SSNs. Submerged speed is significantly higher, while the increased size was necessitated by additional electronics and weapon systems. A BQR-5 sonar is installed there, while the SUBROC, Sub-Harpoon and submarine-launched cruiser systems are planned in addition to conventional and guided torpedoes. The first mission of American SSNs is to attack enemy submarines, but the wide variety of weapon systems at their disposal makes it possible to envisage attacks against surface ships (Sub-Harpoons) or land targets (machines cruising with nuclear warheads). It is possible that the emphasis placed on the strategic role of cruise craft will expand the register of SSN missions to attacks against all kinds of surface targets, going up to distances greater than a thousand kilometers.

Crashes

The USS San Francisco (SSN-711) after its collision (January 28, 2005).
Divers inspect the wreckage of the Ehime Maru (November 5, 2001).

On October 3, 1986, according to the Soviet Navy and denied by the US Navy, the USS Augusta (SSN-710) struck and sank the Soviet Yankee-class SSBN K-219 off Bermuda;
On October 20, 1986, according to the Soviet Navy and denied by the US Navy, the same USS Augusta would have struck the Soviet Delta-class SSBN K-279 in the Atlantic Ocean;
On February 11, 1992, the USS Baton Rouge (SSN-689) struck the Russian SNA K-276 of the Sierra class, which it was tracking off Severomorsk, at the (disputed) limit of Russian territorial waters. No casualties;
On March 19, 1998, the submerged USS San Juan (SSN-751) was struck by the Ohio-class SSBN USS Kentucky (SSBN-737), sailing on the surface, off Long Island. The accident, which caused no casualties, is attributed to human error;
On February 9, 2001, the USS Greeneville (SSN-772) struck the Japanese training trawler Ehime Maru offshore of Oahu during an emergency ascent maneuver. Nine crew members of the Japanese vessel died. The US National Transportation Safety Board concludes that the collision was caused by inadequate communication between senior officers of the USS Greeneville;
November 2, 2002, USS Oklahoma City (SSN-723) strikes a Norwegian cargo ship in the western Mediterranean Sea, damaging the submarine's conning tower and periscope. No injuries.
On January 9, 2005, the USS San Francisco (SSN-711), traveling at high speed near Guam, struck an underwater mountain due to a navigation chart not updated. The sonar dome is crushed by the impact, which deforms the doors of the 4 torpedo tubes and damages 15 torpedoes and 2 Tomahawk cruise missiles. The grounding caused one death and 24 injuries;
On September 5, 2005, around 2 a.m. (local time), the USS Philadelphia was struck by the Turkish freighter Aysen 30 miles off the coast of Bahrain. The freighter damages the Philadelphia's propeller, dive bars and a periscope. No injuries;
On January 9, 2007, the USS Newport News (SSN-750), sailing south of the Strait of Hormuz, was sucked in by the Venturi effect and struck the Japanese tanker Mogamigawa . Minor damage and no injuries.
On March 20, 2009, around 1 a.m. (local time), the USS Hartford (SSN-768) collided in the Strait of Hormuz with the USS New Orleans , San Antonio-class building. The collision caused 15 minor injuries on the Hartford and ruptured the fuel tank of the New Orleans, which resulted in the spillage of approximately 95,000 liters of diesel. The Hartford takes damage to the kiosk and the forward dive bar.

Displacement :6,900 tons in immersion.
Dimensions :
overall length 109.70m;
bau 10.10 m;
draft 9.80 m.
Armament :four 533 mm torpedo tubes.
Propulsion :a D2G reactor and two sets of gas turbines.
Total power 30,000 hp.
Speed in immersion approximately 35 knots.

List of Los Angeles