Seacoast Artillery Sets

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SCXR-582 Fixed Microwave Seacoast Artillery Set

SCR-582
SCR-582

DESCRIPTION: Fixed Seacoast Artillery microwave radar.
USES: Gives PPI indication for harbor control and detection of surface craft and low-flying planes. IFF RC-182 is used.
PERFORMANCE
AND SITING:
SCR-582 covers 360°. From a height of site of 100 to 125 feet, the reliable maximum range is about 20,000 yards and the most probable maximum range is about 35,000 yards. Occasionally, ranges up to the 90,000-yard limit of the range scale can be obtained. Minimum range is about 1000 yards. Azimuth accuracy is of the order of ± 2° depending somewhat on the range scale in use. the range accuracy may be considered ± 3 per cent of the range scale in use. The range scales are 10,000, 30,000, and 90,000 yards. Set should be sited not less than 30 feet above the surrounding terrain and at least 100 to 150 feet above sea level. Optimum height of site is between 150 and 500 feet. Site should not include within the arc of surveillance any obstructions which would come within 5 to 10 degrees of the antenna axis.
TRANSPORTABILITY: Shipment includes spares and separate generator. Complete shipment is packed in 41 units, including power unit and power house. Largest package (power unit) is 5'9" x 6' x 5'11" and weighs 2060 lbs.
INSTALLATION: Set normally is installed in existing harbor defense or group observation posts by Signal Corps personnel. No tower or buildings are furnished as part of the set, but power plant shelters are obtainable.
PERSONNEL: SCR-582 requires one man to operate the set and another to plot the position of detected targets. These men relieve each other every thirty minutes. A power plant operator and maintenance man must be available. For 24-hour operation a chief of section, five operators, two power plant operators, and one maintenance man are required.
POWER: Requires about 1.8 KW, 110 V, 60 cycles, single phase.

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* SCR-682 Transportable Microwave Seacoast Artillery Set

SCR-682
SCR-682

DESCRIPTION: Transportable Seacoast Artillery microwave radar.
USES: Used by 155-mm and 8-inch railway battalions. PPI gives indication of surface craft and low-flying planes. Uses IFF RC-282.
PERFORMANCE
AND SITING:
Set covers 360°. For a height of 100 feet, range will average 50,000 yards or greater. At times, under favorable conditions, very much greater maximum ranges will be achieved from sufficient heights of site. Minimum range is about 500 yards. Azimuth accuracy is on the order of ± 2 degrees depending somewhat on the range scale in use. The range accuracy thus may be considered ± 3 per cent of the range scale in use. The range scales are 10,000; 4,000p; 160,000; and 320,000 yards. Set should be sited not less than thirty feet above the surrounding terrain and preferably at least 100 feet above sea level. The optimum height of site is between 150 and 500 feet.
TRANSPORTABILITY: A transportable version of the SCR-582, SCR-682 can be carried in two standard 21/2-ton 6x6 cargo trucks.
INSTALLATION: Set normally is operated form a portable tower furnished with set. The operating components are located near the tower in a Shelter HO-17 or housing constructed by the using troops from materials obtained locally. No transportation is furnished with the set.
PERSONNEL: One man operates the set and another plots the position of detected targets. These men relieve one another every thirty minutes to reduce fatigue. For 24-hour operation a chief of section, five operators, two power plant operators, and one maintenance man are required.
POWER: Requires about 1.28 KW, 120 V, 60 cycles, single phase.

* Available for issue in latter part of 1943.

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SCR-296-A Fixed Medium Wave Coast Artillery Fire Control Set

SCR-296-A
SCR-296-A

DESCRIPTION: Fixed Coast Artillery gun-laying medium wave radar, assigned to modern 6 inch or larger batteries.
USES: Set is designed to track a surface target in range and azimuth. Data are sent to the plotting room and used in firing. An SCR-296-A normally is assigned to one battery, but may furnish data to more. Works with IFF RC-136-A.
PERFORMANCE
AND SITING:
Range is shown on "A" scope. The target is tracked in azimuth with a pip matching oscilloscope or a zero-center meter. Range accuracy is about ± 30 yards while azimuth accuracy is about ± 0.20 degree under the best conditions. The set has a dependable range of 20,000 yards on a destroyer size target when employed at a height of 145 feet. Site should be not less than 100 feet above sea level; 150 to 500 feet is recommended.
TRANSPORTABILITY: Shipment includes areas and separate generator. When crated the total weight is 91,763 lbs. Largest unit is 5,270 lbs.
INSTALLATION: SCR-296-A includes a tower, an operating building, and two power plant buildings. The tower is obtainable in heights of 25, 50, 75, and 100 feet. Concrete floors must be put in locally.
PERSONNEL: Operating crew consists of 5 men in addition to a power plant operator and maintenance man who should be available at all times.
POWER: Primary power of 2.3 KW is supplied by PE-84C -- commercial or auxiliary 110 V, AC single phase. Generator needs high octane gas.

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*Mark 16 Mobile Microwave Search and Fire Control Set

Mark 16
Mark 16

DESCRIPTION: Microwave surface search and fire control for mobile sea coast artillery.
USES: Supplies gun-laying information in range and azimuth to plotting board, and works with 155-mm., 5", 6", and 7" guns. Indication is given on "A" and PPI scopes. set has provision for IFF identification connections.
PERFORMANCE: Reliable maximum range on large ships, for 50' antenna height, is 15 miles; reliable minimum range is 400 yds. Range accuracy ± 25 yds. Azimuth accuracy, ± 1/4°.
TRANSPORTABILITY: Shipment includes spares, testing equipment and separate generator. Total weight of shipment, including trailers, is about 14 tons. Can be carried in any ship hold exceeding 8' x 11' x 20'.
INSTALLATION: Set is carried in two trailers. Power unit and dismantled antenna and tower are carried in one; all other components are carried in the other. The trailers are usually hauled by caterpillar tractors.
PERSONNEL: Two operators and one maintenance man are minimum requirement. For 24-hour operation, 6 operators are required.
POWER: Primary power required: 115 V AC, 60 cycle power, 5 KVA. Gas driven generator requires auto type gasoline.

* Available for issue in latter part of 1943.

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[B L A N K]

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