Hermes Monitor Unit

Catalogue Number	C0342
Sub-categories	Surveillance/Acoustics
Year of manufacture	1992
Location	Rack RAA06 [Main Store]
Object Type	Indicator/Instrument
Division	Unknown
Platform
Manufacturer	GEC Avionics
Part No	4-242 DL14400
Serial No	022/92
Dimensions	Width (mm):170 Height (mm):310 Depth (mm):80 Weight (g):2950
Inscription(s)	GEC Avionics Limited Hermes Monitor Unit Part 4-242 DL14400 Ser 022/92 NSN 1247 Code K0978 ──────────────── EBL.R. APR 90
Notes	The battery compartment shown on the rear of the unit accommodates the same battery type shown with the related Sensor Unit. Alternatively the unit may be powered by the related Battery Pack via the bottom-left 7-way connector. One of the related Aerials screws onto the top-right TNC connector). The "EBL.R. APR 90" mark indicates it was serviced at Rochester in 1990.

Hermes is a family of VHF radio linked equipment using both seismic and passive infra-red sensors to detect vehicles and men, giving clear indication of classification, direction and numbers. The hand held monitor can simultaneously display the information from a group of up to 10 sensors and can respond to up to 80 sensors in groups of ten. Relay units are provided to enhance the range between sensor and monitor. The equipment was made at Borehamwood (Manufacturer's code: K0978) but was maintained by the Aviation Service and Repair Division at Rochester.