Spruance-class destroyer

Spruance-class destroyer

USS Fife (DD-991) in June 2002, shown with VLS cells.
Class overview
Name:	Spruance class
Builders:	Ingalls Shipbuilding, Pascagoula, Mississippi
Operators:	United States Navy
Preceded by:	Charles F. Adams class
Succeeded by:	Arleigh Burke class
Subclasses:	Kidd class
Built:	1972–1983
In commission:	1975–2005
Completed:	31
Active:	1 (Paul F. Foster) as SDTS
Retired:	30
General characteristics
Type:	Destroyer
Displacement:	8,040 (long) tons full load
Length:	529 ft (161 m) waterline; 563 ft (172 m) overall
Beam:	55 ft (16.8 m)
Draft:	29 ft (8.8 m)
Propulsion:	4 × General Electric LM2500 gas turbines, 2 shafts, 80,000 shp (60 MW)
Speed:	32.5 knots (60 km/h)
Range:	6,000 nautical miles (11,000 km; 6,900 mi) at 20 knots (37 km/h; 23 mph) 3,300 nautical miles (6,100 km; 3,800 mi) at 30 knots (56 km/h; 35 mph)
Complement:	19 officers, 315 enlisted
Sensors and processing systems:	AN/SPS-40 air search radar AN/SPG-60 fire control radar AN/SPS-55 surface search radar AN/SPQ-9 gun fire control radar Mk 23 TAS automatic detection and tracking radar AN/SPS-65 Missile fire control radar AN/SQS-53 bow mounted Active sonar AN/SQR-19 TACTAS towed array Passive sonar Naval Tactical Data System
Electronic warfare & decoys:	AN/SLQ-32 Electronic Warfare System AN/SLQ-25 Nixie Torpedo Countermeasures Mark 36 SRBOC Decoy Launching System AN/SLQ-49 Inflatable Decoys AN/WLR 1 in DD-971 & DD-975.
Armament:	2 × 5-inch (127mm) 54 calibre Mark 45 dual purpose guns 2 × 20 mm Phalanx CIWS Mark 15 guns 1 × 8 cell ASROC launcher 1 × 8 cell NATO Sea Sparrow Mark 29 missile launcher 2× quadruple Harpoon missile canisters 2 × Mark 32 triple 12.75 in (324 mm) torpedo tubes (Mk 46 torpedoes) 2 × quadruple ABL Mark 43 Tomahawk missile launchers (some ships of the class) 1 × 21 cell Rolling Airframe Missile launcher in some ships. A 61-cell Mark 41 VLS launcher for Tomahawk/ASROC missiles was fitted to 24 ships in place of the 8-cell ASROC launcher.
Aircraft carried:	2 x Sikorsky SH-60 Seahawk LAMPS III helicopters.
Aviation facilities:	Flight deck and enclosed hangar for up to two medium-lift helicopters

The Spruance-class destroyer was developed by the United States to replace a large number of World War II–built Allen M. Sumner and Gearing-class destroyers and was the primary destroyer built for the U.S. Navy during the 1970s.

First commissioned in 1975, the class was designed with gas-turbine propulsion, a flight deck and hangar for up to two medium-lift helicopters, all-digital weapons systems, and automated 5-inch guns. Serving for three decades, the Spruance class was designed to escort a carrier group with a primary ASW mission, though in the 1990s 24 members of the class were upgraded with the Mark 41 Vertical Launching System (VLS) for the Tomahawk surface-to-surface missile. Rather than extend the life of the class, the Navy accelerated its retirement. The last ship of the class was decommissioned in 2005, with most examples broken up or destroyed as targets.^[1]

History

Design

The class was originally designed for anti-submarine warfare (ASW) with point defense anti-aircraft warfare (AAW) missiles; upgrades provided anti-ship and land attack capabilities. The ships were initially controversial, especially among members of the United States Congress who believed that their unimposing looks, with only two guns and an ASROC or Armored Box Launcher (ABL) missile launcher per ship implied that the vessels were weak compared to Soviet or older U.S. designs which had more visible guns or launchers for the Standard medium range missiles. Despite the criticism they were successful in their intended ASW role.^[2] Despite their "DD" designation in the hull classification symbol system which was previously applied to gun destroyers, their primary armament as designed was missiles. However the Spruance class as designed carried anti-aircraft missiles only sufficient for point defense, compared to other American destroyers designated as DDG which were designed to provide anti-aircraft warfare screening to the fleet while some newer ships also added powerful surface-to-surface capabilities. A major update in the 1990s added a Vertical Launch Missile System (VLS) for the Tomahawk surface-to-surface missile which modernized the vessels to a strike destroyer standard. However, the Spruance class still lacked the anti-aircraft capabilities of guided-missile cruisers (CG and CGN) and destroyers (DDG).

Six Spruance-class destroyers fitting out, c. May 1975.

The Spruances were much larger than destroyers of that era, being comparable in size to contemporary guided-missile cruisers (CG and CGN) and U.S. Navy light cruisers (CL) in World War II. Their hull dimensions allowed them not only to accommodate a helicopter landing pad, a first for a U.S. Navy destroyer as flight decks were previously only found on frigates and cruisers, they were the first U.S. Navy destroyer/cruiser class to have an enclosed hangar (with space for up to two medium-lift helicopters) which was a considerable improvement over the basic aviation facilities of earlier cruisers.^[3] The "Spru-cans" were the first large U.S. Navy ships to use gas turbine propulsion; they had four General Electric LM2500 gas turbines to generate about 80,000 horsepower (60 MW). This configuration (developed in the 1960s by the Royal Canadian Navy for the Iroquois-class destroyers and known as COmbined Gas And Gas, or COGAG) was very successful and used on most subsequent U.S. warships. As of 2010, all U.S. Navy surface combatants (except nuclear-powered aircraft carriers and the LCS-1) use the LM2500 COGAG arrangement, usually with two such turbines per shaft.

The entire class of 31 ships was contracted on 23 June 1970 to the Litton-Ingalls shipyard in Pascagoula, Mississippi, under the Total Package Procurement concept originated by the Whiz Kids of Robert McNamara's Pentagon. The idea was to reap the benefits of mass construction, but labor and technical problems caused cost overruns and delayed construction.^[4][5] One additional ship, USS Hayler, was ordered on 29 September 1979. Hayler was originally planned as a DDH (Destroyer, Helicopter) design, which would carry more anti-submarine helicopters than the standard design of the Spruance class. Eventually this plan to build a DDH was scrapped and a slightly modified DD-963 class hull was put in commission.

Four additional ships were built originally for the Iranian Navy with the Mark 26/Standard AAW missile system but were completed as Kidds for the U.S. Navy. The Kidd-class destroyers used the same hull as the Spruances but they were more advanced general-purpose ships. It was once planned to build all of the Spruance class up to this standard, but it was too expensive. A slightly lengthened version of the hull was also used for the Ticonderoga-class cruisers, originally planned as DDG-47-class destroyers but redesignated as cruisers in 1980 to emphasize the additional capability provided by the ships' Aegis combat systems, and their flag facilities suitable for an admiral and his staff.

An air-capable mini V/STOL aircraft carrier with fighters and ASW helicopters based on the Spruance hull was seriously considered but not produced.^[6][7]

Upgrades

The Spruance design is modular in nature, allowing for easy installation of entire subsystems within the ship. Although originally designed for anti-submarine warfare, 24 ships of this class were upgraded with the installation of a 61 cell Vertical Launch Missile System (VLS) capable of launching Tomahawk missiles. The remaining seven ships not upgraded were decommissioned early. At least ten VLS ships, including Cushing, O'Bannon, and Thorn, had a 21 cell RIM-116 Rolling Airframe Missile launcher mounted on the starboard fantail.

• David R. Ray tested the RAM system in the 1980s, but had the system removed after the tests.
• Oldendorf was the test platform for the AN/SPQ-9B Anti-ship Missile Defense (ASMD) Firecontrol Radar to be outfitted on the San Antonio-class amphibious transport docks. The AN/SPQ-9B is used to detect all known and projected sea skimming missiles.
• Arthur W. Radford tested the Advanced Enclosed Mast/Sensor system which helped in the mast design of the San Antonio-class amphibious transport dock ships.
• Merrill served as the Navy's test platform for the Tomahawk Cruise Missile Program receiving armored box launchers and test launching a Tomahawk 19 March 1980. Merrill carried two ABLs and an ASROC launcher into the 1990s until the ASROC launcher was removed.

Spruance-class destroyers fired 112 land attack Tomahawks during Operation Desert Storm.^[8]

Decommissioning

In order to save $28 million a year, the Navy accelerated retirement of the Spruance class, though they could have served to 2019 had they been maintained and updated.^[9] Despite the recent modifications to the Spruance and Kidd classes, they were still considered expensive and manpower intensive to operate, while the succeeding Arleigh Burke-class were more capable and versatile due to their Aegis combat system while also being more cost-efficient, and by the end of the 1990s a large of number of Arleigh Burke-class destroyers had entered the fleet. While the early Flight I Arleigh Burke ships only had a flight deck, Flight II and subsequent vessels added the enclosed hangar which made their aviation facilities comparable to the Spruance-class.

The US Navy planned to replace its current destroyers and cruisers with the new Zumwalt-class (DDG-1000) vessels, however the 2010 U.S. Defense budget funded the construction of only three DDG-1000s.^[10] Ending up, production of Arleigh Burke class continued and it became the U.S. Navy's only operational class of destroyers after the USS Cushing was decommissioned on 21 September 2005.^[11]

Some Spruance destroyers were broken up, but rather than being preserved in storage like some older classes, the majority of the class finished their lives as targets. Most were deliberately sunk in various fleet exercises. The last Spruance-class destroyer on active service, USS Cushing, was decommissioned on 21 September 2005. It was then offered to the Pakistan Navy, but was sunk as a target 29 April 2009.

One notable exception being ex–Paul F. Foster which replaced the ex-Decatur in 2005 as the Self Defense Test Ship. The SDTS is a modified ship, operated by remote control to avoid the safety constraints and other problems associated with manned ships being targeted by or towing targets by live weapons. The prearranged attack is in practice aimed at a decoy barge pulled 150 feet behind the SDTS in case of damage.^[12][13] The four Kidd-class destroyers were sold to Taiwan in 2005 and 2006.

Ships in class

Gallery

• 
  starboard quarter view of Fife
• 
  Ingersoll with only ASROC launcher forward, as all destroyers were initially built. Image also shows an example of black masts and no Phalanx CIWS
• 
  Deyo with ASROC and ABL's forward.
• 
  starboard bow view of Deyo, VLS equipped
• 
  Kidd class compared to Spruance class
• 
  Ticonderoga-class cruiser compared to the Spruance class
• 
  Arthur W. Radford with experimental mast
• 
  Cushing with VLS forward and RAM launcher on fantail
• 
  Hayler, the last Spruance destroyer to be built, is sunk

See also

• Ship decommissioning

References

External links

Wikimedia Commons has media related to Spruance class destroyers.

• Spruance-class destroyers at Destroyer History Foundation
• News story: "Last Spruance-Class Destroyer Decommissioned"