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The initial disaster control was in Lockerbie Town Hall.  It moved to Lockerbie Academy, Ordnance Survey grid reference NY 135 823, to provide more space and facilities.  The Academy was 80 metres above sea level.

The main RAYNET radio network diagram is shown below.  A talk-through repeater was installed on Hazelberry Hill to the east of Lockerbie at Ordnance Survey grid reference NY 190 802.  This was at 222 metres above sea level.

As the search areas increased to the east, another talk-through unit was installed further to the east.  This was on Collin Hags at Ordnance Survey grid reference NY 297 800 which was 254 metres above sea level.  Unlike the first VHF/UHF talk-through unit, this one was a VHF in-band talk-through unit.

Both of the talk-through unit's transmitters were 40 Watts and were powered by 12 Volt 65 Amp-hour batteries which were replaced each day with fully charged batteries.

Mobile and hand portable outstations used VHF channel 6 to the talk-through unit on Hazelberry Hill.  The talk-through unit relayed the outstations onto UHF channel 2.

A low power talk-through unit at the north end of Lockerbie Academy relayed any signals on UHF channel 2 onto VHF channel 7.  RAYNET operators in the Lockerbie Academy Control Rooms used low power hand portable radios on VHF channel 7.

Net Control in Lockerbie Academy spoke to both the outstations near Hazelberry Hill and the Control Rooms on UHF channel 2, which was relayed by the two talk-through units onto the appropriate VHF channels.  Net Control also used VHF channel 3 as a fallback or extra channel.

Mobile and hand portable outstations used VHF channel 1 to the talk-through unit on Collin Hags.  The talk-through unit relayed the outstations onto VHF channel 1.

A low power talk-through unit at the south end of Lockerbie Academy relayed any signals on VHF channel 1 onto UHF channel 5.  RAYNET operators in the Lockerbie Academy Control Rooms used low power hand portable radios on UHF channel 5.

As the Control Room RAYNET operators each had two hand portable radios, they used the VHF radio to talk to outstations to the east of Lockerbie and the UHF radio to talk to outstations to the far east.

Two messages could be handled at the same time.  Net Control also had an extra VHF channel for any outstations within direct range.

 
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Page updated on 09 January 2017

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