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| Seaguard equipment. It contains two main units - the receiver and selector. (Courtesy Marconi Mariner magazine) |
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| Seaguard with receiver and selector units withdrawn for inspection. (Courtesy Marconi Mariner magazine) |
SPECIFICATIONS:Type : Automatic alarm receiver receiver
Frequency range: Pretuned to a frequency in the range if 487 to 512 KHz
Modes: CW and MCW
Cira 1954
Mains power: 110 or 220 VAC or AC by using a transformer and rectifier
Designators: Referred to as 1185A and NS703
Comment: This device incorporated a bell alarm which was triggered upon the receipt of the first dashes of an auto alarm signal. It was the follow-on unit for the Vigilant auto alarm.
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| Seaguard equipment. It contains two main units - the receiver and selector. (Courtesy Marconi Mariner magazine) |
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| Seaguard with receiver and selector units withdrawn for inspection. (Courtesy Marconi Mariner magazine) |
Contributors and Credits:
1) Ross Bradshaw [ross.bradshaw@mypostoffice.co.uk]
2) Marconi Mariner magazine Nocember-December 1954
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