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Photography by Action Asia Photo
© 2002-8 Action Asia Photo - All Rights Reserved
www.actionasiaphoto.com

The original Los Angeles Class submarines were numbered SSN-688 to SSN-718. The next group of Los Angeles Class submarines (SSN-719 to SSN-725 and SSN-750) were upgraded by the addition of 12 vertical launch tubes (VSL) to fire off Harpoon and Tomahawk missiles and are referred to as the Los Angeles 688i (Improved) Class

The Los Angeles 688i (Improved) Class (featured on this page) incorporate an advanced BSY-1 sonar suite combat system. These new submarines are quieter than the earlier Los Angeles Class boats.

The boats of the 688i (Improved) Class are easily distinguished from the earlier Los Angeles Class boats by the fact that the forward diving planes are no longer on the sail but are located on the bow. The sail itself was strengthened so the boats of the 688i Class can come up thru polar ice.

Additionally, the "improved" Los Angeles Class submarines are able to lay mines from their torpedo tubes. Their hull numbers are SSN-751 to SSN-773.

Their senor equipment includes:
Type 2 attack periscope (port),
Type 18 search periscope (starboard)
AN/BPS-5 surface search radar,
AN/BPS-15 A/16 navigation and fire control radar,
TB-16D passive towed sonar arrays,
TB-23 passive "thin line" towed array,
AN/BQG-5D wide aperture flank array,
AN/BQQ-5D/E low frequency spherical sonar array, AN/BQS-15 close range active sonar (for ice detection); MIDAS Mine and Ice Detection Avoidance System, SADS-TG active detection sonar

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