SSBN 640 Benjamin Franklin

Benjamin Franklin

SSBN 640 Benjamin Franklin (1965)

Type	SSBN
Country	USA
Displacement (t)	8,250
Length (m)	130.0
Beam (m)	10.0
Draft (m)	8.7
Height (m)	10.0
Max speed submerged (kn)	21.0
Max speed surfaced (kn)	16.0
Max safe depth (m)	305
Endurance (days)	60
Propeller	1 x 7 bladed propeller
Nuclear reactors	1
Titanium hull	No
Navigation system	SINS Mk 2 (Inertial Navigation System)
Class year	1965

Sensors

Sonar (8)

Name	Type	Platform	Passive range (km)	Active range (km)
BQA-8	cav	sub	—	—
BQR-2B	Hull	sub	1.3	—
BQR-7	Hull	sub	2.6	—
BQS-4	Hull	sub	—	1.7
BSH-2	ssp	sub	—	—
DUUG-1	Active Intercept		—	—
UQG-1	com	sub	—	—
UQN-1B	Echo sounder	sub	—	—

Radar (1)

Name	NATO name	Air search	Surface search	Fire control
BPS-11A		—	Yes	—

Launchers (3)

Name

Tubes

Fire control

Max launch depth (m)

533mm Torpedo Tube (forward)

Mk 113 Mod 5

305

1956 - 1959: 4 x Mk 16 Mod 1 , 8 x Mk 37 Mod 0
1960 - 1966: 4 x Mk 16 Mod 1 , 0 x Mk 37 Mod 0 , 8 x Mk 37 Mod 1
1967 - 1970: 4 x Mk 16 Mod 7 , 8 x Mk 37 Mod 2 , 0 x Mk 37 Mod 3
1971 - 1973: 12 x Mk 48 Mod 1
1974 - 1976: 12 x Mk 48 Mod 2
1977 - 1982: 12 x Mk 48 Mod 3
1983 - 1987: 12 x Mk 48 Mod 4
1988 - present: 12 x Mk 48 Mod 5 ADCAP

Missile Launcher

—

125

1959 - 1961: 16 x Polaris A-1
1962 - 1963: 16 x Polaris A-2
1964 - present: 16 x Polaris A-3

Signal Ejector

—

305

Towed devices (2)

Name	Type	NATO name	Towed decoy	Capabilities	Cable (m)	Depth (m)	Speed (kn)
BRA-8 (Imp.)	Trailing buoy	—	—	Receive, Radio (VLF, LF, Radio navigation)	450	396 – 61	3.0 – 12.0
Floating wire VLF (SUBTASK IV)	Trailing wire	—	—	Receive, Transmit, Radio (VLF, LF, MF, HF, Radio navigation)	549	91 – 37	2.3 – 9.0

Individual hulls (12)

Name

Short name

Country

Start date

End date

Remark

SSBN-640 Benjamin Franklin

USS Benjamin Franklin

USA

1965-10-22 (Commissioned)

1980-06-01 (Overhaul)

US Atlantic Fleet: 1965-10-22 – 1970-01-01
US Atlantic Fleet: 1970-01-01 – 1973-12-01
US Atlantic Fleet: 1973-12-01 – 1975-09-01 (Overhaul)
US Atlantic Fleet: 1975-09-01 – 1978-09-01
US Atlantic Fleet: 1978-09-01 – 1980-06-01 (Overhaul)

SSBN-641 Simon Bolivar

USS Simon Bolivar

USA

1965-10-29 (Commissioned)

1981-01-01 (Overhaul)

US Atlantic Fleet: 1965-10-29 – 1969-01-01
US Atlantic Fleet: 1969-01-01 – 1975-01-01
US Atlantic Fleet: 1975-01-01 – 1976-01-01 (Overhaul)
US Atlantic Fleet: 1975-01-01 – 1979-01-01
US Atlantic Fleet: 1976-01-01 – 1977-08-01
US Atlantic Fleet: 1979-01-01 – 1981-01-01 (Overhaul)

SSBN-642 Kamehameha

USS Kamehameha

USA

1965-12-10 (Commissioned)

1982-01-01 (Overhaul)

US Pacific Fleet: 1965-12-10 – 1966-02-01
US Pacific Fleet: 1966-02-01 – 1971-04-01
US Atlantic Fleet: 1971-04-01 – 1973-01-01 (Overhaul (dry dock))
US Atlantic Fleet: 1973-01-01 – 1981-01-01
US Atlantic Fleet: 1981-01-01 – 1982-01-01 (Overhaul)

SSBN-643 George Bancroft

USS George Bancroft

USA

1966-01-22 (Commissioned)

1985-11-01 (Overhaul (dry dock))

US Atlantic Fleet: 1966-01-22 – 1966-07-26
US Atlantic Fleet: 1966-07-26 – 1985-03-01
US Atlantic Fleet: 1985-03-01 – 1985-11-01 (Overhaul (dry dock))

SSBN-644 Lewis and Clark

USS Lewis and Clark

USA

1965-12-22 (Commissioned)

1980-10-03 (Modernization to "SSBN 640 Benjamin Franklin (1977)")

US Atlantic Fleet: 1965-12-22 – 1966-02-01
US Atlantic Fleet: 1966-02-01 – 1971-05-01
US Atlantic Fleet: 1971-05-01 – 1972-07-01
US Atlantic Fleet: 1972-07-01 – 1980-10-03

SSBN-645 James K. Polk

USS James K. Polk

USA

1966-04-16 (Commissioned)

1983-02-01 (Overhaul)

US Atlantic Fleet: 1966-04-16 – 1966-08-01
US Atlantic Fleet: 1966-08-01 – 1971-07-01
US Atlantic Fleet: 1971-07-01 – 1972-02-01 (Overhaul)
US Atlantic Fleet: 1972-02-01 – 1981-09-01
US Atlantic Fleet: 1981-09-01 – 1983-02-01 (Overhaul)

SSBN-654 George C. Marshall

USS George C. Marshall

USA

1966-04-29 (Commissioned)

1977-01-01 (Decommissioned)

US Atlantic Fleet: 1966-04-29 – 1966-08-01
US Atlantic Fleet: 1966-08-01 – 1967-08-01
US Atlantic Fleet: 1967-08-01 – 1971-09-01
US Atlantic Fleet: 1971-09-01 – 1973-02-01 (Overhaul)
US Atlantic Fleet: 1973-02-01 – 1977-01-01 (Decommissioned)

SSBN-655 Henry L. Stimson

USS Henry L. Stimson

USA

1966-08-20 (Commissioned)

1981-01-01 (Overhaul)

US Atlantic Fleet: 1966-08-20 – 1966-11-01
US Atlantic Fleet: 1966-11-01 – 1971-11-01
US Atlantic Fleet: 1971-11-01 – 1973-09-01 (Overhaul)
US Atlantic Fleet: 1973-09-01 – 1980-01-01
US Atlantic Fleet: 1980-01-01 – 1981-01-01 (Overhaul)

SSBN-656 George Washington Carver

USS George Washington Carver

USA

1966-06-15 (Commissioned)

1978-01-01 (Overhaul)

US Atlantic Fleet: 1966-06-15 – 1966-10-01
US Atlantic Fleet: 1966-10-10 – 1970-01-01
US Atlantic Fleet: 1970-01-01 – 1977-01-01
US Atlantic Fleet: 1977-01-01 – 1978-01-01 (Overhaul)

SSBN-657 Francis Scott Key

USS Francis Scott Key

USA

1966-12-03 (Commissioned)

1980-01-01 (Modernization to "SSBN 640 Benjamin Franklin (1977)")

US Atlantic Fleet: 1966-12-03 – 1967-02-01
US Atlantic Fleet: 1967-02-01 – 1969-01-01
US Atlantic Fleet: 1969-01-01 – 1972-04-01
US Atlantic Fleet: 1972-04-01 – 1973-05-01 (Overhaul, refuel + poseidon conversion)
US Atlantic Fleet: 1973-05-01 – 1980-01-01

SSBN-658 Mariano G. Vallejo

USS Mariano G. Vallejo

USA

1966-12-16 (Commissioned)

1977-01-01 (Decommissioned)

US Pacific Fleet: 1966-12-16 – 1967-04-10
US Pacific Fleet: 1967-04-10 – 1977-01-01 (Decommissioned)

SSBN-659 Will Rogers

USS Will Rogers

USA

1967-04-01 (Commissioned)

1981-06-01 (Overhaul)

US Atlantic Fleet: 1967-04-01 – 1967-08-01
US Pacific Fleet: 1967-08-01 – 1972-01-01
US Pacific Fleet: 1972-01-01 – 1974-01-01 (Overhaul)
US Atlantic Fleet: 1974-01-01 – 1980-06-01
US Atlantic Fleet: 1980-06-01 – 1981-06-01 (Overhaul)