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688(I) HUNTER/KILLER
Displacement:
SSN 751-770: 6,300 tons surfaced./7,147 tons submerged.
SSN 771-773: 6,330 tons surfaced/7,177 tons submerged.
Speed:
30+ kts. (submerged)
Dimensions:
Length: 109.73 m
Beam: 10.06 m
Draft: 9.75 m
Armament:
12 Mk 36 vertical tubes for Tomahawk
4/533-mm TT Mk 67 (amidships) for Tomahawk missiles,
Mk 48 and Mk 48 ADCAP torpedoes, etc. (22 reloads + 2 additional emergency)
-SSN 756 and later: mining capability
Radar:
1/BPS-15A or BPS-16 nav.
Sonar:
SSN 716-on: BQQ-5D;
BQS-15 under-ice active,
BQR-15 towed array with BQR-23 signal processor
or TB-16D and TB-23
or TB-29 towed arrays
BSY-1 suite: same equipment plus BQG-5D WAA flank arrays
-SSN 758: HF active array
Electronic Warfare:
BRD-7 direction finder,
WLR-8(V)2 intercept,
WLR-10 intercept,
WLR-9/12 acoustic emission receiver/processor,
WLR-1H intercept,
WSQ-5 portable ELINT collection,
CSA Mk 1 Mod.
2 acoustic decoy launchers
Machinary:
G.E. S6G pressurized-water reactor, 2 sets geared steam turbines;
1/7-bladed prop (pump-jet in SSN 773 and several others); 35,000 shp
Crew:
14 officers, 127 enlisted
Remarks:
"Arctic-capable" (This means they can operate under the ice.)
Hull systems:
Maximum operating depth is 450 m.
· SSN 753 and 754 had partial HY-100 steel pressure hull sections so they could test fabrication procedures for the Seawolf class; the other ones have HY-80 steel hulls.
· Bow is made of glass-reinforced plastic (GRP) as a streamlined fairing over the spherical BQQ-5-A(V)1 sonar array.
· All have one Fairbanks-Morse 38D8Q diesel generator set and batteries for emergency propulsion.
· The reactor core should last 10-13 years between refueling.
· SSN 751 and later models have bow-mounted vice sail-mounted diving planes, the sail has been hardened for breaking through ice.
· Most are also equipped with additional anhedral fins at the stern which support towed arrays; these fins are fitted with seven-celled launchers for 127-mm countermeasures, these fins have also been added to a few earlier units of this class.
· There are two Ships Inertial Navigation System (SINS) which are being replaced by the Litton Marine WSSN-7 ring-laser gyro inertial navigation system.
Combat systems:
· SSN 751 and later models have the first-generation BSY-1 (formerly named SUBACS-Submarine Advanced Combat System) integrated sonar/weapons-control suite.
· One Mk 2 optical and the other Sperry Mk 18 multifunction periscopes are fitted.
· All have 12 vertical-launch tubes for Tomahawk cruise missiles, located between the forward end of the pressure hull and the spherical array for the BQQ-5 bow sonar.
· UGM-84-series Sub-Harpoon missiles were removed during 1996-97.
For gameplay purposes the 688(I)s will carry:
· Mark 48 ADCAP torpedoes
· TLAM: Tomahawk Land Attack Missiles (Cruise Missiles)
· TASM: Tomahawk Anti-Ship Missiles
(Note: In reality the supply of these is dwindling and most have been removed from service or converted to TLAM versions)
Role:
In addition to its Anti-Submarine Warfare (ASW) role, the 688(I)s are also involved with the following type of missions: the insertion of special forces, mine laying and precision strikes against land targets.
Information on this page comes from:
U.S. Naval Institute Combat Fleets of the World
www.fas.org
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