On September 21/18, TV station WNED Ch 17) in Buffalo. NewYork aired a documentary on the Royal Yacht Britannia. This ship is part of the series titled "Great British Royal Ships". Included in the tour was a glimpse of the  Communications Centre as it appeared when the ship was paid off in 1997. Your webmaster photographed some areas of the centre directly from a 42 inch flat screen TV. If anyone can help fill in the unknowns, please contact:

From the onset Britannia was designed to be a floating residence for the Royal family with a quick conversion to a hospital ship. As a hospital ship, Britannia could accomodate some 200 wounded military personel. Not many people know this, but Britannia had a more important (but hidden) role other than providing a means of transport for the Royal Family.  During the peak of the Cold War in the 1950s and 60s, it was feared that a nuclear Armageddon would destroy London and the British seat of government. To ensure the survivability  of the government and to control the military forces, an emergency plan known as Python was devised. It designated five sites from which the government could operate from in case of nuclear attack.  Britannia was one of those five sites. Britain's nuclear ICBM missile force could be controlled from any of those  five sites. Initially, Python was  classified but was declassified once Britannia paid off. .

During the Falklands war with Argentina, Britannia could not fulfill her role as a hospital ship due to cost. By 1982, the entire Royal Navy had converted over to ships which used diesel oil to fuel their engines. Britannia still burned Bunker C oil because she was steam driven.  To dispatch a tanker to the Falklands filled with Bunker C would have simply been cost prohibitive. However Britannia did well in 1986 when she rescued some 1,082 foreign and British nationals who had congregated on a beachhead in Yemen, during that country's civil war.
As of 1997, Britannia was paid off and is now a museum ship in Edinburgh, Scotland. Since has an excellent writeup on HMY Britannia, readers are referred to that web site for any additional information.This web document will therfore focus on the ship's Communications Centre and Britannia's electronics fit  during her service life.

The tour host is seen here entering the Communications Centre. The glare is a reflection from the cameraman's light . Were there any VHF radios on the bridge when Britannia paid off. ? 
britannia _crypto.jpg
This is all that's left from Britannia's crypto system .These might have been BID580's used to read the online broadcast or possibly BID660 devices.  By the 1970s, all comms were done using BID660's or in some cases KW7's. All messages to and from the Queen were encrypted. as well as any state business. 
This is the Marconi Lodestar III , a Medium Frequency Direction Finding set. There might have been a different set here in 1954. 
Telephone set. 
This position in the Comm Centre remains unidentified at this time. 
/britannia_te;l _mimi_swboard.jpg
What is it? 
This appears to be a power distribution panel of some kind, possibly to charge batteries.
The NATO stock number on the Filter Band Suppresser indicates that the equipment is of military origin. 
A general view of the Communications Centre.


Britannia was fitted with Decca Navigator Mk21 for navigation in European coastal waters. This would been after 1969.

Introduced in November 1969, the Deccca Mark 21 was the first receiver where everything was contained in a single box unit. Britannia paid off with this unit. (Photo from the collection of Walter Blanchard)


Loran A Original model is not known at this time, nor is it  known if Britannia was upgraded to Loran 'C' later on. 
Decca Navigator  Original Mark is not known at this time. Upgraded to MK 21 sometime after 1969.
Navigation Radar  Type 974
Commercial type  Model unknown
Echo sounder Model unknown
MF/DF Original model is not known. 
Admiralty (Sperry type) gyro b>compass The master gyro was situated on the platform deck under the bridge with repeaters to the Royal chart house, compass platform, wheelhouse, bridge wings, steering compartment and emergency conning position.


Dixie Deane served aboard HMY Britannia from 1957 to 1986. He recalls some of the older comm configurations. " Receivers - I think we had moved on from B28's and 29's to B40's and 41's. Transmitters  were 600 type although a 603 was adapted especially for Radfones and was known as a DS9B. Royal Cyphers were not double encrypted but had there own individual Typex rotors and settings. Also as a  backup there was a One Time Pad. The Royal Cypher Office was situated in the Royal Apartments as as annex to the Royal Clerks Officer
Four MF/HF transmitters Possibly model 600 .One set is provided with its own battery equipment for emergency use if all other power supplies, including emergency generator, fail. All transmitters are CW/Phone capable,. A link is provided for ship-to-shore telephone communication and on certain phones speech can be scrambled for security purposes if required.
Four  MF/HF receivers These might be the companion Admiralty B28s. 
Aerials Whip aerials were used in addition with wire aerials. The whips are situated on the bridge and on the sides of the funnel. 

The decorative caps on the tops of the masts are Type AJE aerial outfits designed to operate in the 225 to 449MHz band. They were painted gold and only two  out of three were functional. The third one was a dummy. 

Facsimile Model unknown
Sound Reproduction Equipment  Model unknown. Fitted throughout the ship with a choice of three programmes.

Name: HMY Britannia
Radio  Callsign: GQXC.  Before 1953, this callsign was used by a small British merchant steamship called the RUSSELL.
Ordered: 5 February 1952
Builder: John Brown & Company
Laid down: 16 June 1952
Launched: 16 April 1953
Commissioned: 11 January 1954
Decommissioned: 11 December 1997
General characteristics
Tonnage: 5,769 GT
Length: 412 ft (126 m)
Beam: 55 ft (17 m)
Height: 123 ft (37 m) to top of mainmast
Draught: 15 ft (4.6 m)
Propulsion: 2 Pametrada steam turbines, 12,000 hp (combined) 
Speed: 21.5 knots (39.8 km/h; 24.7 mph)
Range: 2,400 nautical miles (4,400 km)
Capacity: 250 guests
Troops: 1 platoon of Royal Marines
Crew: 21 officers and 250 Royal Yachtsmen


1) US Public Broadcasting System
3) Dixie Dean     <yachtieone(at)>
4) Extracts from "Her Majesty's Yacht Britannia" by Sir Victor Shepheard, K.C.B., R.C.N.C.(1954)

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Oct  12/18