SS Dieppe (1905)

Dieppe was a steamship which was built in 1905 for the London, Brighton and South Coast Railway. She was requisitioned during the First World War for use as a troopship and later as a hospital ship HMS Dieppe, returning to her owners postwar. She passed to the Southern Railway on 1 January 1923. In 1933, she was sold to W E Guinness and converted to a private yacht, Rosaura. She was requisitioned during the Second World War for use as an armed boarding vessel, HMS Rosaura. She struck a mine and sank off Tobruk, Libya on 18 March 1941.

Description
The ship was built by Fairfield Shipbuilding & Engineering Co Ltd, Govan. She was yard number 439 and was launched on 6 April 1905 with completion in May 1905. The ship was 273 ft long, with a beam of 34 ft and a depth of 13 ft. She was powered by three steam turbines, which were made by Fairfield. The turbines could propel her at a speed of 22 kn. When converted to a private yacht, the turbines were replaced by two 8-cylinder Atlas diesel engines. One of her propellers was removed as was one of her funnels. Her speed was reduced to 15 kn. As built, her GRT was 1,210. This had increased to 1,426 by 1930, and further increased to 1,536 in 1933.

History
Dieppe was built for the London, Brighton and South Coast Railway. She was used on their Newhaven - Dieppe route. She was requisitioned by the Royal Navy during the First World War for use as a troopship and a hospital ship. Dieppe was returned to her owners postwar and was taken over by the Southern Railway at Grouping. On 27 November 1924, Dieppe had a mishap in which she ended up hitting the breakwater at Newhaven Harbour stern first. The tugs Alert and Richmere were sent to her aid. Richmere became disabled when a cable became entangled around her propellor. The Newhaven Lifeboat Sir Fitzroy Clayton was sent to her aid. Richmere ended up being dashed against the harbour wall and sank. Her crew were rescued by the lifeboat and the tug was later raised and repaired. Dieppe managed to dock some five hours after the drama began.

In September 1933, Dieppe was sold to W E Guinness for conversion to a private yacht. She was renamed Rosaura, replacing Roussalka which had been lost earlier that year. In August 1934, the Prince of Wales and Wallis Simpson took a cruise on Rosaura. According to Wallis, it was during this cruise that she fell in love with the Prince. Also in 1934, Winston Churchill and his wife Clementine cruised on Rosaura in the eastern Mediterranean. On 26 September 1936, Rosaura was in collision with the Dutch coaster MV Henca at Amsterdam, Netherlands and was severely damaged. She was subsequently repaired.

Rosaura was requisitioned by the Royal Navy in the Second World War for use as an armed boarding vessel in the Contraband Control Service. In February 1940, Rosaura was involved in Operation Abstention. On 18 March 1941, Rosaura struck a mine off Tobruk and sank with the loss of 78 lives.

Official number and code letters
Official Numbers were a forerunner to IMO Numbers. Dieppe and Rosaura had the United Kingdom Official Number 105655. Dieppe used the Code Letters HCRB.