Environmental Issues > Nuclear Energy, Nonproliferation, and Disarmament Main Page > All Nuclear Energy, Nonproliferation, and Disarmament Documents

Archive of Nuclear Data
From NRDC's Nuclear Program


Index of Nuclear Data

Table of US Ballistic Missile Submarine Forces
1960-69 | 1970-79 | 1980-89 | 1990-99 | 2000-12 | Notes


SSBN Forces 1960 1961 1962 1963 1964 1965 1966 1967 1968 1969

SSBNs
Polaris [1] 2 5 9 10 20 24 35 41 41 41
Total SSBNs 2 5 9 10 20 24 35 41 41 41

SLBM Launchers
Polaris A1 [4] 32 80 80 80 80 0



Polaris A2 [5]

64 80 208 208 208 208 208 208
Polaris A3 [6]



32 176 352 448 448 448
Total Launchers 32 80 144 160 320 384 560 656 656 656

SLBM Warheads
W47Y1 (A-1) [11] 32 80 80 80 80 0



W47Y1 (A-2) [11]

64 64 64 64 32 0

W47Y2 (A-2) [11]


16 144 144 176 208 208 208
W58 (A-3) [12]



32 176 352 448 448 448
Total Warheads
(MRV=1)
32 80 144 160 320 384 560 656 656 656



SSBN Forces 1970 1971 1972 1973 1974 1975 1976 1977 1978 1979

SSBNs
Polaris [1] 41 34 29 21 19 18 13 12 10 10
Poseidon [2]
7 12 20 22 23 28 29 31 31
Total SSBNs 41 41 41 41 41 41 41 41 41 41

SLBM Launchers
Polaris A2 [5] 208 144 96 48 0




Polaris A3 [6] 448 400 368 288 304 288 208 192 160 160
Poseidon with C3 [7]
112 192 320 352 368 448 464 496 464
Poseidon with C4 [8]








32
Total Launchers 656 656 656 656 656 656 656 656 656 656

SLBM Warheads
W47Y2 (A-2) [11] 208 144 96 48 0




W58 (A-3) [12] 448 400 368 288 304 288 208 192 160 160
W68 (C-3) [13]
1120 1920 3200 3520 3680 4480 4640 4960 4640
W76 (C-4) [14]








256
Total Warheads
(MRV=1)
656 1664 2384 3536 3824 3968 4688 4832 5120 5056



SSBN Forces 1980 1981 1982 1983 1984 1985 1986 1987 1988 1989

SSBNs
Polaris [1] 6 1 0






Poseidon [2] 31 31 31 31 31 30 28 28 26 25
Trident [3]

1 2 4 5 7 8 8 8
Total SSBNs 37 32 32 33 35 35 35 36 34 33

SLBM Launchers
Polaris A3 [6] 96 16 0






Poseidon with C3 [7] 400 368 304 304 304 288 256 256 224 208
Poseidon with C4 [8] 96 128 192 192 192 192 192 192 192 192
Trident with C4 [9]

24 48 96 120 168 192 192 192
Total Launchers 592 512 520 544 592 600 616 640 608 592

SLBM Warheads
W58 (A-3) [12] 288 48 0






W68 (C-3) [13] 4000 3680 3040 3040 3040 2880 2560 2560 2240 2080
W76 (C-4) [14] 768 1024 1728 1920 2304 2496 2880 3072 3072 3072
Total Warheads 5056 4752 4768 4960 5344 5376 5440 5632 5312 5152
Total Warheads
(MRV=1)
4864 4720 4768








SSBN Forces 1990 1991 1992 1993 1994 1995 1996 1997 1998 1999

SSBNs
Poseidon [2] 23 12 11 0





Trident [3] 10 12 13 14 15 16 17 18 18 18
Total SSBNs 33 24 24 14 15 16 17 18 18 18

SLBM Launchers
Poseidon with C3 [7] 176 0







Poseidon with C4 [8] 192 192 176 0





Trident with C4 [9] 192 192 192 192 192 192 192 192 192 192
Trident with D5 [10] 48 96 120 144 168 192 216 240 240 240
Total Launchers 608 480 488 336 360 384 408 432 432 432

SLBM Warheads
W68 (C-3) [13] 1760 0







W76 (C-4) [14] 3072 2688 2496 1536 1536 1536 1536 1536 1536 1536
W76 (D-5)
384 576 768 960 1152 1344 1536 1536 1536
W88 (D-5) [15] 384 384 384 384 384 384 384 384 384 384
Total Warheads
(MRV=1)
5216 3456 3456 2688 2880 3072 3264 3456 3456 3456



SSBN Forces 2000 2001 2002 2007* 2012**

SSBNs
Trident [3] 18 18 18 14 14
Total SSBNs 18 18 18 14 14

SLBM Launchers
Trident with C4 [9] 192 168 168

Trident with D5 [10] 240 264 264 336 336
Total Launchers 432 432 432 336 336

SLBM Warheads
W76 (C-4) [14] 1536 1008 1008

W76 (D-5) 1536 1728 1728 1560 1300
W88 (D-5) [15] 384 384 384 384 380
Total Warheads 3456 3120 3120 1944 1680
*   The 2007 figure is a goal of the Bush administration's 2001 Nuclear Posture Review
** The 2012 figure is a limit of the Treaty of Moscow signed on May 24, 2002


NOTES

1. USS George Washington (SSBN 598) first deployed with Polaris A-1 SLBMs on 15 November 1960.

2. USS James Madison (SSBN 627) first deployed with Poseidon C-3 SLBMs on 31 March 1971. On 10 June 1985, the White House announced that the US would dismantle a ballistic missile submarine to remain within the SALT II ceiling on MIRVed missiles. The USS Sam Rayburn (SSBN 635) was subsequently deactivated on 16 September 1985. It was converted to a moored training ship to train personnel in the Naval Nuclear Propulsion Program. The first training class began in early 1990. On 27 May 1986, the White House announced that the US would dismantle two more SSBNs. These were the USS Nathan Hale (SSBN 623) and the USS Nathaniel Greene (SSBN 636), retired on 3 November 1986 and 16 December 1986. The FY 1988 DOD Authorization Act specified that no money be authorized to overhaul USS Andrew Jackson (SSBN 619). It was retired on 1 April 1988. The USS John Adams (SSBN 620) was deactivated on 1 October 1989 and the USS James Monroe (SSBN 622) on 14 October 1989. As a result of President Bush's September 27, 1991 announcement all remaining SSBNs that carried Poseidon SLBMs were taken off alert. The other twelve SSBNs that carried the Trident C-4 SLBM were retired by the end of 1993.

3. USS Ohio (SSBN 726) first deployed with Trident I C-4 SLBMs on 1 October 1982.

4. The Polaris A-1 was on active duty from 15 November 1960 to 14 October 1965.

5. The PolarisA-2 was on active duty from 26 June 1962 to 9 June 1974.

6. The Polaris A-3 was on active duty from 28 September 1964 to 25 February 1982.

7. On 31 March 1971 the USS James Madison (SSBN 627) deployed for patrol with 16 Poseidon C-3 missiles. The Poseidon SLBM would eventually be deployed on 31 SSBNs, after which 12 were retrofitted with Trident I SLBMs and deployed between October 1979 and June 1983. As a result of President Bush's September 27, 1991 announcement all remaining SSBNs that carried Poseidon SLBMs were taken off alert.

8. On 20 October 1979, the USS Francis Scott Key (SSBN 657) deployed with Trident I C-4 SLBMs. The twelfth and last Lafayette/Franklin class SSBN to be retrofitted with Trident I C-4s, the USS Casimir Pulaski (SSBN 633) deployed on 3 June 1983. By the end of 1993 the l twelve SSBNs that carried the Trident I SLBM were retired.

9. On 11 November 1981 the USS Ohio (SSBN 726) the first Trident submarine deployed with Trident I SLBMs. A total of eight Ohio-class SSBNs, based in the Pacific at Bangor WA, would deploy with Trident I SLBMs between 1981 and 1986.

10. On 29 March 29 the USS Tennessee (SSBN 734) went on its first patrol with Trident II SLBMs.

11. Single Mk-1 (Navy) reentry vehicle. The W47 Y1 (600 kt) nuclear warhead entered Phase 6 (Quantity Production Unit in June 1960, the date the first warhead was produced by the Atomic Energy Commission. The Mk-1 (Navy) was also on the Polaris A-2 with the W47 Y1 warhead and the W47 Y2 (1.2 Mt) warhead.

12. Up to three W58 (200 kt) warheads on the Mk-2 (Navy) multiple reentry vehicle (MRV). The W58 nuclear warhead entered Phase 6 (Quantity Production Unit in March 1964, the date the first warhead was produced by the Atomic Energy Commission. The MRV was a precursor to the MIRV, where the warheads could not be independently targetable. Because the area in which the warheads can be targeted is limited many tables count the multiple RVs as one warhead. For purposes of estimating warhead production they should be counted separately.

13. Up to ten W68 (40-50 kt) warheads on the Mk-3 MIRV. The maximum number of reentry vehicles that have been flight-tested on the Poseidon C-3 SLBM is 14. Loadings per missile prior to withdrawal of ten Polaris SSBNs probably averaged nine warheads; see testimony by Paul H. Nitze, Senate Armed Services Committee, SALT Hearings, Part 3, p. 897. After withdrawal Poseidon SLBMs were selectively uploaded: see House Armed Service Committee (HASC), FY 1982 DOD, Part 3, p. 156; House Appropriations Committee, FY 1982 DOD, Part 7, p.544; HASC, FY 1983 DOD, Part 4, p. 118. The W68 nuclear warhead entered Phase 5 (FPU) in May 1970, the date the first warhead was produced by the Atomic Energy Commission.

14. Up to eight W76 (100 kt) warheads on the Mk-4 MIRV. The maximum number of reentry vehicles that have been flight tested for the Trident I C-4 SLBM is seven. The figure of seven reentry vehicles for the Trident I C-4 is based on the maximum number of reentry vehicles actually released during flight-tests of the missile as of 1 May 1979. If simulated releases of reentry vehicles had been counted as flight-tests of reentry vehicles, as is the case for simulations occurring after 1 May 1979, the figure for the Trident I C-4 would have been eight, which is the largest number of reentry vehicles for which the missile is designed and with which it will be deployed; see Annex to Letter from Secretary of State Cyrus Vance to the President Transmitting the SALT Treaty, June 21, 1979 in ACDA, Documents on Disarmament 1979, p. 263. The nuclear warhead entered Phase 5 (FPU) in June 1978, the date the first warhead was produced by the Department of Energy.

15. Up to eight W88 (475 kt) warheads in a Mk-5 MIRV. The nuclear warhead entered Phase 5 (FPU) in September 1988 and Phase 6 in June 1989. Only some 400 warheads were manufactured before Rocky Flats and the rest of the production complex ceased operation at the end of 1989 and the beginning of 1990.

last revised 11.25.02

Sign up for NRDC's online newsletter

See the latest issue >

Switchboard Blogs

China Environmental News Alert - September 26, 2014
posted by Greenlaw from NRDC China, 9/26/14
Feeling a Cold War Chill over Ukraine
posted by Matthew McKinzie, 7/23/14
China Environmental News Alert
posted by Greenlaw from NRDC China, 6/22/14

NRDC Gets Top Ratings from the Charity Watchdogs

Charity Navigator awards NRDC its 4-star top rating.
Worth magazine named NRDC one of America's 100 best charities.
NRDC meets the highest standards of the Wise Giving Alliance of the Better Business Bureau.


Donate now >

Share | |