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The Seawolf-class submarine is one of the most powerful submarine combatants in the world. It's quieting is surpassed only by the technically demanding and expensive shepistani SSN designs (all known extant examples of which were destroyed after the Bio-war). Two subclasses exist, known as Flight I and Flight II.

Flight I boats were purchased by Canissia, the Byzantine Empire, and Tian Xia. Boats bought by Tian Xia primarily differed in additional strengthening to allow surfacing through ice.

The Flight II boats include improvements to the quieting, as well as other modifications, that significantly change the characteristics. Production switched over after the eleventh TXN boat in the class. The S7W reactor used in the Flight II uses natural circulation until power production requires greater output. Materials were also changed, from HY100 steel to HY130 steel, allowing greater diving depth, at greater cost. The Flight II boats also changed from conventional periscopes to advanced photonics masts. Only Tian Xia has ordered Flight II submarines.

Production of the Seawolf class was restarted in 2015, delivering in 2016. 2018+ boats include a newly redesigned reactor, amongst other improvements, resulting in them being designated Flight III. New production boats are constructed out of HY150 steel, allowing even deeper diving depths.

Flight I[]

Characteristics[]

Displacement: 8,600 tons (surfaced) 9,138 tons submerged
Length: 353 feet.
Beam: 40 feet
Draft: 35 feet
Speed: 35 knots submerged, 20 knots tactical
Test depth: about 1600 ft
Crew: 121 men
Range: unlimited
Propulsion: S6W reactor, 52,000 shp

Armament[]

8 26 inch torpedo tubes, storage for 50 torpedos/missiles, or twice as many mines

EW & Decoys[]

WLY-1 torpedo decoy
WLQ-4(v)1 ECM system

Electronics[]

BYG-1 battle management
TB-16D towed sonar array
TB-29A towed sonar array
BGS-24 active sonar
BQQ-5D active/passive sonar
BQG-5D flank sonar array

Flight II[]

Characteristics[]

Displacement: 9,530 tons (surfaced) 10,644 tons submerged
Length: 403 feet.
Beam: 40 feet
Draft: 36 feet
Speed: 34 knots submerged, 19 knots tactical
Test depth: about 2400 ft
Crew: 121 men
Range: unlimited
Propulsion: S7W assisted natural circulation reactor, turbo-electric, 36.5MW high temperature superconducting AC motor

Armament[]

8 26 inch torpedo tubes, storage for 50 torpedos/missiles, or twice as many mines
12 VLS cells

EW & Decoys[]

WLY-1 torpedo decoy
WLQ-4(v)1 ECM system

Electronics[]

BYG-1 battle management
TB-16D towed sonar array
TB-29A towed sonar array
BGS-24 active sonar
BQQ-5E active/passive sonar
BQG-5E flank sonar array

Flight III[]

Characteristics[]

Displacement: 9,530 tons (surfaced) 10,644 tons submerged
Length: 403 feet.
Beam: 40 feet
Draft: 36 feet
Speed: 34 knots submerged, 19 knots tactical
Test depth: about 2400 ft
Crew: 121 men
Range: unlimited
Propulsion: S1E reactor, turbo-electric, 39MW high temperature superconducting AC motor

Armament[]

8 26 inch torpedo tubes, storage for 50 torpedos/missiles, or twice as many mines
4 7 inch torpedo tubes for launch of 6.75" diameter torpedos. (2 bow, 2 stern)
12 VLS cells

EW & Decoys[]

WLY-1 torpedo decoy
WLQ-4(v)1 ECM system

Electronics[]

BYG-1 battle management
BQR-25 active/passive towed sonar arrays (similar to SQR-20 on surface ships)
BGS-24 active sonar
BQQ-5F active/passive sonar
BLQ-11 mine reconnaissance system
BQG-5G flank sonar array

Operators[]

Ship List[]

Tian Xia
Name Number Commissioning Date Status
Seawolf SSN-500 1998 Active
Parche SSN-502 1998 Active
Ray SSN-504 1999 Active
Whale SSN-506 1999 Active
Sunfish SSN-508 1999 Active
Puffer SSN-510 2000 Active
Spadefish SSN-511 2000 Active
Finback SSN-512 2000 Active
Archerfish SSN-513 2001 Active
Tunny SSN-514 2001 Active
Hammerhead SSN-515 2001 Active
Bluefish SSN-516 2002 Active, Flight II boat
Thresher SSN-517 2002 Active
Pollack SSN-518 2002 Active
Haddock SSN-519 2003 Active
Jack SSN-520 2003 Active
Skipjack SSN-521 2003 Active
Albacore SSN-522 2004 Active
Flasher SSN-523 2004 Active
Scamp SSN-524 2004 Active
Swordfish SSN-525 2005 Active
Bonefish SSN-526 2005 Active
Wahoo SSN-527 2005 Active
Barracuda SSN-528 2006 Active
Barbel SSN-529 2006 Active
Trout SSN-530 2006 Active
Bass SSN-531 2007 Active
Pickerel SSN-532 2007 Active
Balao SSN-533 2007 Active
Tang SSN-534 2008 Active
Whitefish SSN-535 2008 Active
Sea Devil SSN-536 2008 Active
Lamprey SSN-537 2009 Active
Catfish SSN-538 2009 Active
Blackfin SSN-543 2009 Active
Bigeye SSN-544 2016 Active
Longtail SSN-545 2016 Active
Bonito SSN-546 2017 Active
Bluefin SSN-547 2017 Active
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