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As of the start of the Twilight War (1996), the United States Navy was currently deployed as follows:

(included are ships that are laid down, the assumption being that the shipyards would have moved into 2-3 shifts trying to get as many ships completed as possible, the “normal“ launch date of the ship is included)

Source material is the “13th, 14th and 15th Editions of the Ships and Aircraft of the U.S. Fleet” and “Combat Fleets of the World: 1993”.

The USN operates 128 nuclear propelled attack submarines (SSN), 2 special operations transport submarines (SSN) and four diesel-electric attack submarines (SS). New attack submarines are being built at the rate of three per year.

Seawolf-class SSN
SSN-21 Seawolf Building, in service 5-96
Displacement 9,150 tons subm. Speed is 35+kts subm. Crew of 130. Armed with 8 762mm (30in) torpedo tubes. The new design intended to replace the Los Angeles-class. It has a planned production run of 30 at the rate of 3-4 per year starting 1989, with a planned in service date of 1995

Improved Los Angeles-class SSN
SSN-719 Providence Atlantic Fleet
SSN-720 Pittsburgh Atlantic Fleet
SSN-721 Chicago Pacific Fleet
SSN-722 Key West Atlantic Fleet
SSN-723 Oklahoma City Atlantic Fleet
SSN-724 Louisville Atlantic Fleet
SSN-725 Helena Pacific Fleet
SSN-750 Newport News Atlantic Fleet
SSN-751 San Juan Atlantic Fleet
SSN-752 Pasadena Pacific Fleet
SSN-753 Albany Atlantic Fleet
SSN-754 Topeka Atlantic Fleet
SSN-755 Miami Atlantic Fleet
SSN-756 Scranton Building, in service 26-1-91
SSN-757 Alexandria Building, in service 29-6-91
SSN-758 Asheville Building, in service 28-9-91
SSN-759 Jefferson City Building, in service 28-2-92
SSN-760 Annapolis Building, in service 11-4-92
SSN-761 Springfield Building, in service 7-93
SSN-762 Columbus Building, in service 6-93
SSN-763 Santa Fe Building, in service 1994
SSN-764 Boise Building, in service 7-92
SSN-765 Montpelier Building, in service 1-93
SSN-766 Charlotte Building, in service 1994
SSN-767 Hampton Building, in service 1993
SSN-768 Hartford Building, in service 1994
SSN-769 Toledo Building, in service 1994
SSN-770 Tucson Building, in service 1995
SSN-771 Columbia Building, in service 1996
SSN-772 Greenville Building, in service 1995
SSN-773 Cheyenne Building, in service 1995
Displacement of 6,927 tons subm. Speed of 18kts surf and 30+kts subm. Crew of 133. Armed with 4 533mm torpedo tubes and a 12 tube VLS for Tomahawk missiles.

Los Angeles-class SSN
SSN-688 Los Angeles Pacific Fleet
SSN-689 Baton Rouge Atlantic Fleet
SSN-690 Philadelphia Atlantic Fleet
SSN-691 Memphis Atlantic Fleet
SSN-692 Omaha Pacific Fleet
SSN-693 Cincinnati Atlantic Fleet
SSN-694 Groton Atlantic Fleet
SSN-695 Birmingham Atlantic Fleet
SSN-696 New York City Pacific Fleet
SSN-697 Indianapolis Pacific Fleet
SSN-698 Bremerton Pacific Fleet
SSN-699 Jacksonville Atlantic Fleet
SSN-700 Dallas Atlantic Fleet
SSN-701 La Jolla Pacific Fleet
SSN-702 Phoenix Atlantic Fleet
SSN-703 Boston Atlantic Fleet
SSN-704 Baltimore Atlantic Fleet
SSN-705 City of Corpus Christi Atlantic Fleet
SSN-706 Albuquerque Atlantic Fleet
SSN-707 Portsmouth Atlantic Fleet
SSN-708 Minneapolis-Saint Paul Atlantic Fleet
SSN-709 Hyman G. Rickover Atlantic Fleet
SSN-710 Augusta Atlantic Fleet
SSN-711 San Francisco Pacific Fleet
SSN-712 Atlanta Atlantic Fleet
SSN-713 Houston Pacific Fleet
SSN-714 Norfolk Atlantic Fleet
SSN-715 Buffalo Pacific Fleet
SSN-716 Salt Lake City Atlantic Fleet
SSN-717 Olympia Pacific Fleet
SSN-718 Honolulu Pacific Fleet
Displacement of 6,927 tons subm. Speed of 18kts surf and 30+kts subm. Crew of 133. Armed with 4 533mm torpedo tubes. 14 are assigned to the Pacific Fleet, 17 to the Atlantic Fleet.

Narwhal-class SSN
SSN-671 Narwhal Atlantic Fleet
Displacement of 5,830 tons subm. Speed of 20+kts surf, 25+kts subm. Crew of 129. Armed with 4 533mm torpedo tubes. Assigned to the Atlantic Fleet. Uses a natural-circulation nuclear plant that reduces machinery noises, this concept was later improved and used in the Los Angeles/Ohio classes.

Glenard P. Lipscomb-class SSN
SSN-685 Glenard P. Lipscomb Atlantic Fleet
Displacement of 6,480 tons subm. Speed 18kts surf, 25kts subm. Crew of 129. Armed with 4 533mm torpedo tubes. Assigned to the Atlantic Fleet. Designed with a turbine electric drive that reduces machinery noise, but at a slower speed.

Sturgeon-class SSN
SSN-637 Sturgeon Atlantic Fleet
SSN-638 Whale Atlantic Fleet
SSN-639 Tautog Pacific Fleet
SSN-646 Grayling Atlantic Fleet
SSN-647 Pogy Pacific Fleet
SSN-648 Aspro Pacific Fleet
SSN-649 Sunfish Atlantic Fleet
SSN-650 Pargo Atlantic Fleet
SSN-651 Queenfish Pacific Fleet
SSN-652 Puffer Pacific Fleet
SSN-653 Ray Atlantic Fleet
SSN-660 Sandlance Atlantic Fleet
SSN-661 Lapon Atlantic Fleet
SSN-662 Gurnard Pacific Fleet
SSN-663 Hammerhead Pacific Fleet
SSN-664 Sea Devil Atlantic Fleet
SSN-665 Guitarro Pacific Fleet
SSN-666 Hawkbill Pacific Fleet
SSN-667 Bergall Atlantic Fleet
SSN-668 Spadefish Atlantic Fleet
SSN-669 Seahorse Atlantic Fleet
SSN-670 Finback Atlantic Fleet
SSN-672 Pintado Pacific Fleet
SSN-673 Flying Fish Atlantic Fleet
SSN-674 Trepang Atlantic Fleet
SSN-675 Bluefish Atlantic Fleet
SSN-676 Billfish Atlantic Fleet
SSN-677 Drum Pacific Fleet
SSN-678 Archerfish Atlantic Fleet
SSN-679 Silversides Atlantic Fleet
SSN-680 William H. Bates Pacific Fleet
SSN-681 Batfish Atlantic Fleet
SSN-682 Tunny Pacific Fleet
SSN-683 Parche Pacific Fleet
SSN-684 Cavalla Pacific Fleet
SSN-686 Mendel Rivers Atlantic Fleet
SSN-687 Richard B. Russell Pacific Fleet
Displacement of 4,960 tons subm. Speed of 15kts surf, 30+kts subm. Crew of 129. Armed with 4 533mm torpedo tubes. 15 are assigned to the Pacific Fleet, 22 to the Atlantic Fleet.

Permit-class SSN
SSN-594 Permit Pacific Fleet
SSN-595 Plunger Pacific Fleet
SSN-596 Barb Pacific Fleet
SSN-603 Pollack Pacific Fleet
SSN-604 Haddo Pacific Fleet
SSN-605 Jack Atlantic Fleet
SSN-606 Tinosa Atlantic Fleet
SSN-607 Dace Atlantic Fleet
SSN-612 Guardfish Pacific Fleet
SSN-613 Flasher Pacific Fleet
SSN-614 Greenling Atlantic Fleet
SSN-615 Gato Pacific Fleet
SSN-621 Haddock Atlantic Fleet
Displacement of 4,770tons subm. Speed is 15kts surf and 30+kts subm. Crew of 127. Armed with 4 533mm torpedo tubes. 8 in service with the Pacific Fleet and 5 with the Atlantic Fleet. Originally the Thresher-class until the loss of the lead sub in 1963, the first nuclear submarine loss and the worst submarine disaster.


Ethan-Allen-class SSN (Special Operations)
SSN-609 Sam Houston Pacific Fleet
SSN-611 John Marshall Atlantic Fleet
Displacement of 7,880 tons sub,. Speed of 15kts surf and 20kts subm. Crew of 132 and a passenger capacity of 65. Armed with 4 533mm torpedo tubes. One each serves in both fleets. Originally Polaris-armed SSBN, disarmed as part of the SALT treaties and then modified to support SEAL operations. Each sub can carry up to 65 SEALs and is fitted with two Dry Deck Shelters that each accommodate a swimmer-delivery vehicle. It is currently planned to retire these subs in 1990 and replace them with modified Benjamin Franklin-class SSBNs that have dearmed as per the SALT agreements.

Tullibee-class SSN
SSN-597 Tullibee Atlantic Fleet Reserve
Displacement of 2,607 tons subm. Speed is 15kts surf and 20kts subm. Crew of 94. Armed with 4 533mm torpedo tubes. A small hunter-killer design intended to operate off of enemy ports, but production halted on its sisters with the construction of the Permit-class. In the Atlantic Reserve Fleet.

Halibut-class SSN
SSN-587 Pacific Fleet Reserve
Displacement of 5,000 tons subm. Speed of 15 kts surf and 15+ kts subm. Crew of 120. Armed with 6 533mm torpedo tubes. Built as a Regulus II cruise missile submarine and then heavily modified for “research duties”. Further details will result in a SEAL team visiting your home and asking you to stop any further inquires…or else! Currently in the Pacific Reserve Fleet.

Triton-class SSN
SSN-586 Triton Atlantic Fleet Reserve
Displacement of 6,670 tons subm. Speed is 27kts surf and 20+kts subm. Crew of 159. Armed with 6 533mm torpedo tubes. Built as a radar picket submarine, and then reclassified as an attack submarine. Only two reactor sub in the USN, conducted the first round the world while submerge cruise in 1960. Was planned to convert her into a national command ship, but never carried out. In the Atlantic Reserve Fleet.

Skipjack-class SSN
SSN-585 Skipjack Atlantic Fleet
SSN-588 Scamp Atlantic Fleet Reserve
SSN-590 Sculpin Atlantic Fleet
SSN-591 Shark Atlantic Fleet
SSN-592 Snook Pacific Fleet Reserve
Displacement of 3,500 tons subm. Speed is 15kts surf, 30+kts subm. Crew of 118. Armed with 6 533mm torpedo tubes. First SSN to use the “teardrop” hull design and were the fastest submarines in service until the Los Angeles-class. USS Scorpion of this class was lost with all hands in 1968, the second US nuclear sub loss. In service with the Atlantic Fleet and two boats in the Pacific Reserve Fleet.

Skate-class SSN
SSN-578 Skate Pacific Fleet Reserve
SSN-579 Swordfish Pacific Fleet
SSN-583 Sargo Pacific Fleet
SSN-584 Seadragon Pacific Fleet Reserve
Displacement of 2,860 tons subm. Speed of 15.5kts surf and 20kts subm. Crew of 122. Armed with 8 533mm torpedo tubes. The first US SSN in series production. In the Pacific Fleet or the Pacific Reserve Fleet.
Seawolf-class SSN

SSN-575 Seawolf Pacific Fleet Reserve
Displacement of 4,970 tons subm. Speed of 19kts surf, 20kts subm. Crew of 151. Armed with 6 533mm torpedo tubes. The world’s second nuclear-powered sub. In the Pacific Reserve Fleet.

DIESEL-ELECTRIC ATTACK SUBMARINES
Barbel-class SS
SS-580 Barbel Pacific Fleet
SS-581 Blueback Pacific Fleet
SS-582 Bonefish Pacific Fleet
Displacement of 2,640 tons subm. Speed of 15kts surf and 25kts subm. Crew of 85. Armed with 6 533mm torpedo tubes. The last diesel-electric subs built by the USN. One in service with the Atlantic Fleet and 2 in the Pacific.

Darter-class SS
SS-576 Darter Pacific Fleet
Displacement of 2,250 tons subm. Speed of 19.5kts surf and 14kts subm. Crew of 93. Armed with 8 533mm torpedo tubes. Only sub in USN service that still uses the old Mark 37 torpedoes. In the Pacific Fleet and home-ported in Japan.

You will notes some of the nuclear powered subs are listed as being assigned to the Reserve Fleet, these tend to have very old fire-control systems, are considerable more noisey than the more modern boats, and most, importantly, have reached the end of their current fuel rod life span.

Current estimates are, that in order to reactive, refuel and modernize these boats would take approx 12-14 months (source Congessional Review 1991).