SSN 688 Los Angles Class

Displacement: 6,927t Submerged.
Dimensions: Length 109m; Beam 10m; Draft 9m.
Armament: four (533mm) midship torpedo tubes twelve Vertical Launch Systems.
Propulsion: one S6G nuclear reactor, one shaft, 35,000 shp, 30+ kts submerged.
Description: The LOS ANGELES class SSN specifically included ASW against Soviet submarines trying to sink the US carrier and ASUW against capital ships in the Soviet surface action group [SAG]. The LOS ANGELES class SSN was designed almost exclusively for Carrier Battle group escort; they were fast, quiet, and could launch Mk-48 and ADCAP torpedoes, Harpoon Anti-Ship Missiles (no longer carried), and both land attack and anti-ship (no longer carried) Tomahawk cruise missiles. The new submarines showed another step improvement in quieting and an increase in operating speed to allow them to support the CVBG. Escort duties included conducting ASW sweeps hundreds of miles ahead of the CVBG and conducting attacks against the SAG.

These submarines were built in three successive variants:

· SSNs 688-718 - Original Los Angeles class

· SSNs 719-750 - Starting with SSN 719 and beyond the last 31 hulls of the class have 12 vertical launch tubes for the Tomahawk cruise missile, along with an upgraded reactor core.

· SSNs 751-773 :The final 23 hulls [SSN 751 and later] referred to as "688I" (for improved), are quieter, incorporate an advanced BSY-1 sonar suite combat system and the ability to lay mines from their torpedo tubes. They are configured for under-ice operations in that their forward diving planes have been moved from the sail structure to the bow and the sail has been strengthened for breaking through ice.

Units

688 VLS

Improved Los Angeles