british British Royal Navy - Admiralty - RN HMS A-7 [+1914]
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nationality british
purpose war
type submarine
subtype/class A class (group 2) submarine (br.)
propulsion diesel and batteries
date built 1905
live live
weight (tons) 207  disp (subm)
dimensions 32.2 x 3.9 x 3.3 m
material steel
engine 1 x 6 cyl gasoline motor engine (500~600 hp), 1 electric motor (150 hp), single shaft
armament 4 torpedoes, 2 T.T. 18"/450mm, 2 fwd and 0 aft
power 550  h.p.
speed 10.5  knots
about the loss
cause lost exercise
date lost 16/01/1914  [dd/mm/yyyy]
casualties  max.11rank: 651
about people
Vickers, Sons & Maxim Ltd., Barrow-In-Furness
British Royal Navy - Admiralty - RN, London
complement 14
about the wreck
depth (m.) 27 max. / -- min. (m)
orientation 45°
protected yes
war grave yes
entered by Lettens Jan
entered 01/07/2002
last update Lettens Jan
last update 01/12/2009
Lettens Jan22/03/2012
latitudeUK hydro member
longitudeUK hydro member
AISUK hydro member
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dist. homeportdist. homeport
ref. used
 UK Hydrographic Office
position disp.
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  The Wreck today  

Lettens Jan06/08/2007

Position 50.18.29N-04.17.55W, 42m deep

Allen Tony26/06/2007

Lies in mud and only the conning tower is visible. Can be difficult to locate. Have the position as 50.19.45N-04.18.25W in 27 metres. Now a WAR GRAVE.

Lettens Jan22/03/2012

UK hydro member
ref. used
 UK Hydrographic Office

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copyright: Unknown - onbekend - inconnu
 copyright: Unknown - onbekend - inconnu copyright: Unknown - onbekend - inconnu copyright: Unknown - onbekend - inconnu copyright: UK Hydrographic Office 
 copyright: Unknown - onbekend - inconnu copyright: Unknown - onbekend - inconnu   
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  Hydrographic Service UK  
Allen Tony31/08/2007HMS A7, an early British A Class submarine, was built by Vickers Sons and Maxim Ltd at Barrow-in-Furness and launched in 1905. She was commissioned on 13 April 1905 with a crew consisting of 2 officers and 9 ratings. The A7 was 105 ft long with a beam of just over 12 ft. Her operating depth was 50 ft with a maximum diving depth of 100 ft. The A7 was the first submarine in the Royal Navy to be fitted with hydroplanes on her conning tower.

She was powered by a single 600 BHP petrol engine and a 150 BHP electric motor, propelling her to a cruising speed of 11 knots when surfaced and 6 knots when submerged. Her fuel capacity was 7 tons of gasoline which gave her a range of 325 miles at full power when surfaced and 20 miles at 6 knots when submerged. This A Class sub was equipped with two 18 in ch bow torpedo tubes and she carried four torpedoes, two in the tubes and two spare.
Claes Johnny22/11/200716-01-1914 - Whilst carrying out practice torpedo attacks against HM Ships Onyx and Pigmy, HMS A7 failed to surface having been seen to submerge by HMS Pigmy at 1110 The cause of her loss is not known and although her wreck was located on the 22nd of January bad weather prevented salvage. 12-03-1914 - Burial held at sea.
Allen Tony26/06/2007[Other Source:] Royal Navy submarine. Lost with all eleven hands from a so-far unknown cause in Whitsand Bay while exercising with surface ships, but it is suspected that there may have been an accident involving the hydroplanes which were being tested at the time.Vessel is 94 feet in length.
Lettens Jan22/03/2012UK hydro member
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 UK Hydrographic Office

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Bouzid Hayet08/05/2013[FR]

 Unknown - onbekend - inconnu

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About Owners
British Royal Navy - Admiralty - RN, London

In 1509 when Henry VIII was crowned he realised the growing navel power of King James IV of Scots. James had built an impressive fleet to control the Western Isles and was allied to France. Henry built up of his own fleet, the Navy Royal, as it was then known. New ships were constructed, the best known being the Mary Rose. Smaller types of warships (galleases) combining the best features of oars, sails and guns were also built. By Henry's death in 1547 his fleet had grown to 58 vessels.

In 1546 a 'Council of the Marine' was established which later became the 'Navy Board'. The Navy Board was in charge of the daily administration of the navy until 1832 when it was combined with the Board of the Admiralty.

Elizabeth I inherited a fleet of only 27 ships in 1558. Instead of building up her own fleet Elizabeth encouraged private enterprise against Spain's new empire. Men like Sir John Hawkins and Sir Francis Drake to command groups of Royal and private ships to attack the Spanish. When Spain threatened invasion with its Armada in 1588 the Navy of England both Royal and private defended the realm.

Early in the Seventeenth Century, larger galleons were built with heavier armaments. the largest English ship was Sovereign of the Seas built for prestige purposes by Charles I in 1637. The first ship with three gun decks to carry her 102 guns, she was the most powerful ship in the world for many years.

When King Charles II came to the throne in 1660 he inherited a huge fleet of 154 ships. This was a permanent professional national force and the beginning of the Royal Navy as we know it today.

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Allen Tony  04/01/2012
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 Peter Mitchell
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HMS A-7 [+1914]
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Dive Centre with a dive charter RHIB based near Falmouth, covering Falmouth Bay and the Manacles. Twin engined catamaran rib coded for 10 divers and skippered by an experienced local diver and RYA Instructor.
Atlantic Scuba
Dive Centre with a dive charter RHIB based near Falmouth, covering Falmouth Bay and the Manacles. Twin engined catamaran rib coded for 10 divers and skippered by an experienced local diver and RYA Instructor.
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