Inertial Navigation Platform

Technical Information

Catalogue No: C0594
Category: Navigation/Inertial
Object Type: Sensor/Transducer
Object Name: Inertial Navigation Platform
Part No: None
Serial No: 205/3/7
Manufacturer: Marconi Avionics
Division: Gyro [GD]
Platform(s): Machan 
Year of Manufacture: 1980
Width (mm):
Height (mm):
Depth (mm):
Weight (g):
Location: Archive Object Store

Ser No 205/3/7
Marconi Avionics PLC
Gyro Division


Marconi Avionics developed a high accuracy Digital Strapdown Attitude/Heading Reference System for the UK Spearfish heavyweight Torpedo. The system has its origins in the AHRS developed under an Admiralty contract in 1965 which ultimately went into the Sting Ray Torpedo. The company Gyro Division worked with Marconi Space and Defence Systems Ltd and Marconi Underwater Systems Ltd to produce the new digital system for Spearfish.
The Spearfish torpedo is used by the submarines of the Royal Navy. It is a dual-purpose wire-guided weapon and provides both anti-submarine warfare (ASW) and anti-surface ship warfare (ASuW) capability, replacing the Tigerfish torpedo which was withdrawn in 2004.
The production contract for the Spearfish Torpedo was placed with Marconi Underwater Systems Ltd (now BAE Systems) in 1983, following a development programme lasting for several years. Spearfish entered full production in 1988, with deliveries completed in 2003.
This unit however is a further modification of the Spearfish design which was adapted by the company research laboratory FARL,for the MACHAN unmanned aircraft . The unit is boxed in a perspex case and does not have a Identification Plate.

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