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Sting Ray Control Sensor Unit

Technical Information

Catalogue No: C0083
Category: Navigation/Inertial
Object Type: Sensor/Transducer
Object Name: Sting Ray Control Sensor Unit
Part No: 205/3/073
Serial No: SM01/84
Manufacturer: Marconi Avionics
Division: Guidance Systems [GSD]
Platform(s): Sting Ray Torpedo 
Year of Manufacture: 1984
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Main Object Store

Control Sensor Unit
Part 205/3/073,
Ser SM01/84.
Code K0656
Modification Record -


This unit is in a delivery package, a cardboard box with a foam plastic liner moulded to fit the unit. This box also contains a pressure sensor like the related object C0619. The sensor connects to the unit's short flying lead via a round four-pin connector, one half of which can be seen on the end of the sensor. The sensor is probably used to provide a depth measurement for the torpedo's guidance system.

The given dimensions are for the main unit, excluding delivery package; the pressure sensor alone is 29 x 78 x 43 mm & 194g.

In 1965 a funded contract was awarded by the Admiralty Underwater Weapons Establishment to investigate solutions to building a ruggedised Attitude Sensor Unit (ASU), later called a Control Sensor Unit (CSU) for a projected new lightweight Torpedo which became Sting Ray. The unit was required to withstand 150g shock.

The Company Research Lab. (FARL) developed a strapdown system using simple rate gyros and accelerometers with all electronic computation (initially analogue). The ASU is an advanced, strapped-down attitude sensing and control unit with basic advantages over the contemporary torpedo sensing and control systems.

The unit is small, light, very rugged, inherently drift free and, apart from its mechanical transducers, the ASU is all solid state. It is inherently flexible and with minor variations can be applied in many types of underwater weapons.

The first trial took place in 1966 in a van at West Malling Airfield using an E3 Platform as a reference. In 1967 the system was brought into production by the then Gyro Division and the Sting Ray Torpedo entered service in 1983.

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