USS Saratoga (CV-3) was a Lexington-class aircraft carrier built for the United States Navy during the 1920s. Originally designed as a battlecruiser, she was converted into one of the Navy's first aircraft carriers during construction to comply with the Washington Naval Treaty of 1922. The ship entered service in 1928 and was assigned to the Pacific Fleet for her entire career. Saratoga and her sister ship, Lexington, were used to develop and refine carrier tactics in a series of annual exercises before World War II. On more than one occasion these exercises included successful surprise attacks on Pearl Harbor, Hawaii. She was one of three prewar US fleet aircraft carriers, along with Enterprise and Ranger, to serve throughout World War II.

Shortly after the Japanese attack on Pearl Harbor, Saratoga was the centerpiece of the unsuccessful American effort to relieve Wake Island and was torpedoed by a Japanese submarine a few weeks later. After lengthy repairs, the ship supported forces participating in the Guadalcanal Campaign and her aircraft sank the light carrier Ryūjō during the Battle of the Eastern Solomons in August 1942. She was again torpedoed the following month and returned to the Solomon Islands area after repairs were completed.

In 1943, Saratoga supported Allied forces involved in the New Georgia Campaign and invasion of Bougainville in the northern Solomon Islands and her aircraft twice attacked the Japanese base at Rabaul in November. Early in 1944, her aircraft provided air support during the Gilbert and Marshall Islands Campaign before she was transferred to the Indian Ocean for several months to support the British Eastern Fleet as it attacked targets in Java and Sumatra. After a brief refit in mid-1944, the ship became a training ship for the rest of the year.

In early 1945, Saratoga participated in the Battle of Iwo Jima as a dedicated night fighter carrier. Several days into the battle, she was badly damaged by kamikaze hits and was forced to return to the United States for repairs. While under repair, the ship, now increasingly obsolete, was permanently modified as a training carrier with some of her hangar deck converted into classrooms. Saratoga remained in this role for the rest of the war and was then used to ferry troops back to the United States after the Japanese surrender in August, as a part of Operation Magic Carpet. In mid-1946, the ship was a target for nuclear weapon tests during Operation Crossroads. She survived the first test with little damage, but was sunk by a second test.

Contents

1 Design and construction

1.1 Flight deck arrangements

1.2 Propulsion

1.3 Armament

1.4 Fire control and electronics

1.5 Armor

1.6 Structural changes

2 Service history

2.1 Inter-war period

2.2 World War II

2.2.1 Guadalcanal Campaign

2.2.1.1 Battle of the Eastern Solomons

2.2.2 1943

2.2.3 1944

2.2.4 1945

2.3 Postwar years

2.3.1 Operation Crossroads

3 Notes

4 Citations

5 References

6 External links

Design and construction

Saratoga on 8 March 1922, after her construction had been suspended. There are circular barbettes on blocks on her deck, which would have been used for the battlecruiser's main battery

Saratoga was the fifth US Navy ship named after the 1777 Battle of Saratoga, an important victory during the Revolutionary War.[1] She was originally authorized in 1916 as a Lexington-class battlecruiser, but before she was laid down construction was placed on hold so that higher-priority anti-submarine vessels and merchant ships, needed to ensure the safe passage of men and materiel to Europe during Germany's U-boat campaign, could be built. After the war the design was extensively altered to incorporate improved boiler technology, anti-torpedo bulges, and a general increase in armor protection based on British wartime experiences.[2] Given the hull number of CC-3, Saratoga was laid down on 25 September 1920 by New York Shipbuilding Corporation of Camden, New Jersey.[1]

In February 1922, before the Washington Naval Conference concluded, the ship's construction was suspended[3] when she was 28 percent complete.[4] She was ordered to be converted to an aircraft carrier with the hull number CV-3 on 1 July 1922.[1] Her displacement was reduced by a total of 4,000 long tons (4,100 t), achieved mainly by the elimination of her main armament of eight 16-inch (406 mm) guns in four twin gun turrets (including their heavy barbettes, armor, and other equipment).[5][6] The main armor belt was retained, although it was reduced in height to save weight.[7] The hull generally remained unaltered, as did the torpedo protection system, because they had already been built and it would have been too expensive to alter them.[8]

The ship had an overall length of 888 feet (270.7 m), a beam of 106 feet (32.3 m), and a draft of 30 feet 5 inches (9.3 m) at deep load. Saratoga had a standard displacement of 36,000 long tons (36,578 t), and 43,055 long tons (43,746 t) at deep load. At that displacement, she had a metacentric height of 7.31 feet (2.2 m).[5]

Christened by Olive Doolittle, wife of Curtis D. Wilbur, Secretary of the Navy, Saratoga was launched on 7 April 1925 and commissioned on 16 November 1927, under the command of Captain Harry E. Yarnell.[1] She was nicknamed by her crew Sister Sara and, later, Sara Maru.[9] In 1942, the ship had a crew of 100 officers and 1,840 enlisted men, and an aviation group totaling 141 officers and 710 enlisted men.[5] By 1945, her crew totaled 3,373, including her aviation group.[10]

Flight deck arrangements

The ship's flight deck was 866 feet 2 inches (264.01 m) long and had a maximum width of 105 feet 11 inches (32.28 m).[5] Her flight deck was widened forward and extended 16 feet (4.9 m) aft during her refit in mid-1941.[11] When built, her hangar "was the largest single enclosed space afloat on any ship"[12] and had an area of 33,528 square feet (3,114.9 m2). It was 424 feet (129.2 m) long and no less than 68 feet (20.7 m) wide. Its minimum height was 21 feet (6.4 m), and it was divided by a single fire curtain just forward of the aft aircraft elevator. Aircraft repair shops, 108 feet (32.9 m) long, were aft of the hangar, and below them was a storage space for disassembled aircraft, 128 feet (39.0 m) long. Saratoga was fitted with two hydraulically powered elevators on her centerline. The forward elevator's dimensions were 30 by 60 feet (9.1 m × 18.3 m) and it had a capacity of 16,000 pounds (7,300 kg). The aft elevator had a capacity of only 6,000 pounds (2,700 kg) and measured 30 by 36 feet (9.1 m × 11.0 m).[12] Avgas was stored in eight compartments of the torpedo protection system, and their capacity has been quoted as either 132,264 US gallons (500,670 l; 110,133 imp gal) or 163,000 US gallons (620,000 l; 136,000 imp gal).[13]

Saratoga landing aircraft, 6 June 1935

Saratoga was initially fitted with electrically operated arresting gear designed by Carl Norden that used longitudinal wires intended to prevent the aircraft from being blown over the side of the ship, and transverse wires to slow the aircraft to a stop. This system was authorized to be replaced by the hydraulically operated Mk 2 system, without longitudinal wires, on 11 August 1931. Four improved Mk 3 units were added in 1934, giving the ship a total of eight arresting wires and four barriers intended to prevent aircraft from crashing into parked aircraft on the ship's bow. When the forward flight deck was widened, an additional eight wires were added there to allow aircraft to land over the bow if the landing area at the stern was damaged.[14] The ship was built with a 155-foot (47.2 m), flywheel-powered, F Mk II aircraft catapult, also designed by Norden, on the starboard side of the bow.[5][12] This catapult was strong enough to launch a 10,000-pound (4,500 kg) aircraft at a speed of 48 knots (89 km/h; 55 mph). It was intended to launch seaplanes, but was rarely used; a 1931 report counted only five launches of practice loads since the ship had been commissioned. It was removed some time after 1936.[15]

Relatively few changes were made during the war to Saratoga's aircraft-handling equipment. Her crew removed her forward arresting wires in late 1943, although their hydraulic systems were not removed until her refit in mid-1944. At that time she received two Type H hydraulic catapults mounted in her forward flight deck to handle the heavier aircraft entering service. Before the war, plans were made to replace the aft elevator with a 44-by-48-foot (13.4 m × 14.6 m) model, but manufacturing delays and operational demands prevented this from ever happening. By mid-1942, the increasing size and weight of naval aircraft exceeded the capacity of the aft elevator and it was locked in place. It was removed in March 1945 to save weight and the opening in the flight deck was plated over. The machinery for the forward elevator was scheduled to be upgraded before the war, but this was not done until mid-1944. A new, 44-by-48-foot lightweight forward elevator as used in the Essex-class carriers was installed in March 1945.[16]

Saratoga was designed to carry 78 aircraft of various types, including 36 bombers,[17] but these numbers increased once the Navy adopted the practice of tying up spare aircraft in the unused spaces at the top of the hangar.[18] In 1936, her air group consisted of 18 Grumman F2F-1 and 18 Boeing F4B-4 fighters, plus an additional nine F2Fs in reserve. Offensive punch was provided by 20 Vought SBU Corsair dive bombers with 10 spare aircraft and 18 Great Lakes BG torpedo bombers with nine spares. Miscellaneous aircraft included two Grumman JF Duck amphibians, plus one in reserve, and three active and one spare Vought O2U Corsair observation aircraft. This amounted to 79 aircraft, plus 30 spares.[5] In early 1945, the ship carried 53 Grumman F6F Hellcat fighters and 17 Grumman TBF Avenger torpedo bombers.[19]

Propulsion

The Lexington-class carriers used turbo-electric propulsion; each of the four propeller shafts was driven by two 22,500-shaft-horsepower (16,800 kW) electric motors. They were powered by four General Electric turbo generators rated at 35,200 kilowatts (47,200 hp). Steam for the generators was provided by sixteen Yarrow boilers, each in its own individual compartment.[20] Six 750-kilowatt (1,010 hp) electric generators were installed in the upper levels of the two main turbine compartments to provide power to meet the ship's hotel load (minimum electrical) requirements.[21]

The ship was designed to reach 33.25 knots (61.58 km/h; 38.26 mph).[5] She carried a maximum of 6,688 long tons (6,795 t) of fuel oil, but only 5,400 long tons (5,500 t) of that was usable, as the rest had to be retained as ballast in the port fuel tanks to offset the weight of the island and main guns.[22] Designed for a range of 10,000 nautical miles (19,000 km; 12,000 mi) at a speed of 10 knots (19 km/h; 12 mph),[5] the ship demonstrated a range of 9,910 nmi (18,350 km; 11,400 mi) at a speed of 10.7 knots (19.8 km/h; 12.3 mph) with 4,540 long tons (4,610 t) of oil.[22]

Armament

The Navy's Bureau of Construction and Repair was not convinced when the class was being designed that aircraft could effectively substitute as armament for a warship, especially at night or in bad weather that would prevent air operations.[23] Thus the carriers' design included a substantial gun battery of eight 55-caliber Mk 9 eight-inch guns in four twin gun turrets. These turrets were mounted above the flight deck on the starboard side, two before the superstructure, and two behind the funnel, numbered I to IV from bow to stern.[24] In theory the guns could fire to both sides, but it is probable that firing them to port would have damaged the flight deck.[25] They could be depressed to −5° and elevated to +41°.[10]

The ship's heavy anti-aircraft (AA) armament consisted of twelve 25-caliber Mk 10 five-inch guns which were mounted on single mounts, three each fitted on sponsons on each side of the bow and stern.[26] No light AA guns were initially mounted on Saratoga, but two twin .50-caliber (12.7 mm) machine gun mounts were installed in 1929. They were unsuccessful,[27] but only the mount on the roof of Turret II was replaced by two .50-caliber (12.7 mm) machine guns by 1934. During the ship's August 1941 overhaul, four 50-caliber Mk 10 three-inch AA guns were installed in the corner platforms. Another three-inch gun was added on the roof of the deckhouse between the funnel and the island. In addition, a number of .50-caliber machine guns were added on platforms mounted on her superstructure. The three-inch guns were just interim weapons until the quadruple 1.1-inch gun mount could be fielded, which occurred during a brief refit at the Bremerton Navy Yard in late November 1941.[28]

While receiving temporary repairs at Pearl Harbor in January 1942 (after being torpedoed on 11 January 1942), Saratoga's eight-inch turrets, barbettes and ammunition hoists were removed; they were replaced by four twin 38-caliber five-inch dual-purpose gun mounts in February at Bremerton. New barbettes were built and the ammunition hoists had to be returned from Pearl Harbor. The eight-inch guns and turrets were reused as coast defense weapons on Oahu.[29] The older 25-caliber five-inch guns were replaced at the same time by eight more dual-purpose guns in single mounts. As the new guns were heavier than the older ones, only two could be added to the corner gun platforms; the space formerly used by the third gun on each platform was used by an additional quadruple 1.1-inch mount. In addition 32 Oerlikon 20 mm cannon were installed, six at the base of the funnel and the others distributed along the sides and rear of the flight deck. When the ship's repairs were completed in late May, her armament consisted of 16 five-inch guns, nine quadruple 1.1-inch gun mounts and 32 Oerlikon 20-millimeter (0.79 in) guns.[30]

After the ship was again torpedoed on 31 August 1942, her 1.1-inch gun mounts were replaced by an equal number of quadruple Bofors 40 mm mounts while she was under repair at Pearl Harbor. Her light anti-aircraft armament was also increased to 52 Oerlikon guns at the same time. In January 1944 a number of her 20 mm guns were replaced by more Bofors guns, many of which were in the positions formerly occupied by the ship's boats in the sides of the hull. Saratoga mounted 23 quadruple and two twin 40 mm mountings as well as 16 Oerlikon guns when she completed her refit.[31][32]

Fire control and electronics

The two superfiring eight-inch turrets had a Mk 30 rangefinder at the rear of the turret for local control, but the guns were normally controlled by two Mk 18 fire-control directors, one each on the fore and aft spotting tops.[24] A 20-foot (6.1 m) rangefinder was fitted on top of the pilothouse to provide range information for the directors.[10] Each group of three 5-inch guns was controlled by a Mk 19 director, two of which were mounted on each side of the spotting tops. Plans were made before the war to replace the obsolete Mk 19 directors with two heavier Mk 33 directors, one each on the fore and aft five-inch spotting tops, but these plans were cancelled when the dual-purpose guns replaced the main armament in early 1942.[26]

Saratoga received an RCA CXAM-1 early warning radar in February 1941 during a refit in Bremerton. The antenna was mounted on the forward lip of the funnel with its control room directly below the aerial, replacing the secondary conning station formerly mounted there. She also received two FC (Mk 3) surface fire-control radars in late 1941, although these were both removed along with her main armament in January 1942. The new dual-purpose guns were controlled by two Mk 37 directors, each mounting an FD (Mk 4) anti-aircraft gunnery radar. When the 1.1-inch guns were replaced by 40 mm guns in 1942, the directors for the smaller guns were replaced by five Mk 51 directors. A small SC-1 early warning radar was mounted on the rear lip of the funnel during 1942. A SG surface-search radar was mounted on the foremast at the same time.[33]

During the ship's refit in January 1944, her electronics were modernized. The CXAM was replaced by an SK model and the SC-1 was replaced by an SC-3. The forward SG was supplemented by an additional SG-1 mounted on a short mast at the aft end of the funnel. A lengthier overhaul in mid-1944 provided the opportunity to revise the radar arrangements. The SK radar was moved to the rebuilt foremast and the forward SG radar was replaced by an SG-1 mounted at the top of the foremast. An SM-1 fighter-control radar was mounted in the SK's former position and new antennas were added to the FD radars to allow them to determine target height. The SC-3 was replaced by an SC-4 in early 1945.[34]

Armor

The waterline belt of the Lexington-class ships tapered 7–5 inches (178–127 mm) in thickness from top to bottom and angled 11° outwards at the top. It covered the middle 530 feet (161.5 m) of the ships. Forward, the belt ended in a bulkhead that also tapered from seven to five inches in thickness. Aft, it terminated at a seven-inch bulkhead. This belt had a height of 9 feet 4 inches (2.8 m). The third deck over the ships' machinery and magazine was armored with two layers of special treatment steel (STS) totaling 2 inches (51 mm) in thickness; the steering gear was protected by two layers of STS that totaled 3 inches (76 mm) on the flat and 4.5 inches (114 mm) on the slope.[35]

The gun turrets were protected only against splinters with .75 inches (19 mm) of armor. The conning tower was armored with 2–2.25 inches (51–57 mm) of STS, and it had a communications tube with two-inch sides running from the conning tower down to the lower conning position on the third deck. The torpedo defense system of the Lexington-class ships consisted of three to six medium steel protective bulkheads that ranged from .375 to .75 inches (10 to 19 mm) in thickness. The spaces between them could be used as fuel tanks or left empty to absorb the detonation of a torpedo's warhead.[35]

Structural changes