Brooke class

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Brooke class
USS Schofield (FFG-3)
USS Schofield (FFG-3)
Overview
Type Guided missile frigate
units 6th
Namesake John Mercer Brooke
period of service

1966–1989 (US Navy)
1989–1994 (Pakistan)

Technical specifications
displacement

3,425 ts

length

126.3 meters

width

13.5 meters

Draft

7.9 meters

crew

17 officers, 219 sailors

drive

1 propeller, 1 gear turbine, 2 boilers; 35,000  wave horsepower

speed

27+ knots

Range

4,000  nautical miles at 20 knots

The frigates of the Brooke-class were the first with missile -equipped offshore support vessels of the United States Navy . The six ships of the class were in service with the US Navy from 1966 to 1989, four units then served in the Pakistani Navy until 1994 .

history

Talbot shortly after commissioning

Construction and development

Based on the Garcia class hull, the class's guided missile frigates were developed as new anti-aircraft ships for the US Navy in the late 1950s. Funding for the first three ships was approved for fiscal 1962, with the remaining three authorized the following year. The first three ships were laid down at Lockheed Ship Building in Seattle , Washington between December 1962 and April 1963, with the remaining three following between January 1964 and May 1965 at Bath Iron Works . Originally, two more ships were planned for the 1964 financial year, but these were not approved. The total cost per ship to build was $ 18.5 million for the first three and $ 30.1 million for the last three ships.

units

Modifications

Since the DASH drones did not prove themselves , at the end of the 1960s and the beginning of the 1970s all Brookes were converted to accommodate a manned LAMPS-I helicopter of the type SH-2 Seasprite . For this purpose, the drone hangar was converted so that it could be telescoped out. The landing deck was reinforced to support the weight of the helicopter.

The original missile armament from RIM-24 Tartar was converted to the newer SM-1 MR in 1972/73 .

During construction, a reload magazine was developed for the ASROC missile torpedo system, which was also installed on the Brooke-class frigates from the fourth ship (FFG-4). The ships built previously were not retrofitted.

In 1974 the Talbot was used as a test ship for the electronic equipment of the Oliver Hazard Perry class and the Pegasus class and for this purpose was temporarily equipped with armament and electronics for the planned ships, after the tests the equipment was dismantled.

Whereabouts

The six ships of the class were decommissioned between September 1988 and January 1989. The Brooke , Talbot , Richard L. Page and Julius A. Furer were rented and used by the Pakistani Navy between 1989 and 1994 , after which the ships were finally decommissioned and scrapped. The Ramsey and the Schofield were sunk as target ships in 1989 .

technology

Bow view of the Brooke

Hull and superstructure

The hull of a Brooke was 126.3 meters long and 13.5 meters wide. The draft at the sonar bulge was 7.9 meters, the displacement in the empty state is 2,640 ts , the operational displacement was 3,425 ts.

The air-conditioned deckhouse extended about half the length of the ship, and the forecastle was about a third of the length of the ship. The end of the superstructure was formed by the drone / helicopter hangar, behind which the landing deck is located at the level of the main deck. Behind the bridge, which spanned the entire width of the hull, the superstructure became narrower. The Mack (combination of mast and chimney), which carries the ships' radar and radio antennas, was located directly behind the navigation bridge. Amidships were davits for the frigates' tenders on each side .

drive

The ships were propelled by a high-pressure steam turbine from Westinghouse Electric Corporation , which delivered its output of 35,000 shaft horsepower to a shaft with a propeller .

The Brookes had high-pressure heating steam boilers, the steam was generated at 83.4 bar pressure in two boilers from Foster-Wheeler , which delivered 10% more output than their predecessors with 50% weight savings. The maximum speed was 27 knots , the range was 4000 nautical miles (about 7200 kilometers) at 20 knots . The ships have an active anti-roll system.

Armament

The main armament of the frigates was the Mark 22 guided missile launcher for RIM-24 Tartar / RIM-66 SM MR on the aft deckhouse. The drum magazine under the launch arm held 16 guided missiles. The Brookes first used the starter on ships.

There was an ASROC starter for submarine hunting in front of the navigating bridge, which from the fourth ship also had a reload magazine for a further 16 submarine torpedoes. Also on the forecastle is a Mark 30 -5-inch gun turret. The gun was against land and sea targets, be limited used against air targets and had a cadence 15-20 rounds per minute. The maximum range was about 8 nautical miles.

In the transom two were in the first years Mark-25 - torpedo tubes Wire-guided anti-submarine torpedoes, these have been disabled in the late sixties and welded shut the openings. On both sides of the superstructure there was also a swing-out triple torpedo tube for Mark 32 U hunting torpedoes.

electronics

Ramsey radars

Originally the frigates were equipped with a SPS-39 - 3D radar with a range of 190 nautical miles, this was replaced in 1968 by a SPS-52 radar with a range of 280 nautical miles. A SPS-10 radar with a range of 37 nautical miles was used as the surface search radar. For locating submarines at their disposal Brookes an SQS-26 - Sonar in bulbous bow.

Fire control of the Mk-22 -Starters possessed the ships via a Mk-74 - fire control radar , with only a missile could be simultaneously routed to the finish each. The Mk-56 fire control system of the Mk-30 gun was located above the bridge.

Mission profile

The Brooke-class frigates were used primarily in aircraft carrier combat groups as anti- aircraft and anti-submarine fighters, but also operated in smaller destroyer squadrons .

Additional information

literature

Web links

Commons : Brooke class  - collection of pictures, videos, and audio files

Individual evidence

  1. ↑ a b Terzibaschitsch: Seemacht USA, p. 452
  2. ↑ a b c d e Terzibaschitsch: Seemacht USA, p. 451
  3. ↑ maritimequest.com , as of August 5, 2007
  4. ↑ Terzibaschitsch: Combat systems of the US Navy . Koehler Verlagsgesellschaft, Hamburg, 2001, ISBN 3-7822-0806-4 . P. 16ff