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British Submarine HMS K4

HMS K-4 on the shallows of Walney Island at low tide, January 1917

British Submarine HMS K4

HMS K4 was a K-class submarine of the British Royal Navy. Launched on 13 July 1916, she was commissioned on 1 January 1917.

K4 had an accident prone career, first being stranded on Walney Island in January 1917, followed by a collision with HMS K1 on 17 November 1917. This resulted in the loss of K1 although her crew were rescued.

On 31 January 1918, during a night time fleet exercise K4 was sunk after colliding with K6 and K7, while she was attempting to avoid K3. HMS K4 was lost with all hands.

British Submarine HMS Seal

HMS Seal

British Submarine HMS Seal

HMS Seal was a Grampas-class minelaying submarine of the British Royal Navy. Launched on 28 September 1938, she was commissioned on 28 January 1939.

On 4 May 1940 after laying a minefield in the Skagerrak, Seal was hunted by German trawlers after being spotted by aircraft. Successfully avoiding the trawlers, she ran into an uncharted minefield. Suffering considerable damage she sank to the bottom and waited until nightfall before attempting to surface.

After considerable difficulty, the crew managed to raise her, but she could no longer submerge and damage to her rudder meant she could only steer in reverse. After destroying all confidential papers and equipment Seal made for Sweden and internment. Unfortunately she was spotted by two Arado Ar 196 floatplanes, which were soon joined by a Henkel He 115. With his guns out of action, wounded crew members and unable to dive, Captain Lonsdale surrendered.

Despite the crew’s expectation that the submarine would sink by herself as she was listing and holed, the Germans managed to salvage her. She was repaired at huge cost, renamed UB and used as a training ship and for propaganda purposes. A lack of spares and high maintenance costs saw her paid off, stripped and abandoned in 1943. KMS UB was never used operationally against British forces.

US Battleship USS Florida BB-30

USS Florida BB-30 seen in 1921

US Battleship USS Florida BB-30

USS Florida (BB-30) was the lead ship of her class of dreadnought battleships for the US Navy. Launched on 12 May 1910, she was commissioned on 15 September 1911.

During World War One, she was sent to reinforce the British Grand Fleet, where she undertook patrols of the North Sea and escorted convoys to Norway. She did not engage ships of the German High Seas Fleet.

Post-war she was heavily modernised from 1924 to 1926. This included strengthening her deck armour, adding torpedo bulges, the removal of her submerged torpedo tubes and rear lattice mast and trunking her two funnels into one. Four 5″ guns on sponsons were also removed. Her machinery was significantly upgraded by utilising the oil fired boilers removed from battleships and battlecruisers that were scrapped under the Washington Treaty.

The terms of the 1930 London Treaty required the reduction in size of the signatories’ battle fleets. USS Florida was decommissioned on 16 February 1931 and sold for scrap.

Under Construction

In Service 1911 to 1924

In Service Post Refit 1927 to 1931

Armament

Aircraft

Internal

Being Scrapped