HMS Riviera
Riviera at anchor in 1914–15 with her early canvas hangars
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| History | |
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 United Kingdom
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| Name: | SS Riviera |
| Owner: | South East and Chatham Railway |
| Port of registry: | London (1911–14) |
| Builder: | William Denny and Brothers, Dumbarton, Scotland |
| Launched: | 1 April 1911 |
| Completed: | 1911 |
| Fate: | Leased to Royal Navy, 11 August 1914 |
 United Kingdom
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| Name: | HMS Riviera |
| Acquired: |
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| Commissioned: | 6 September 1914 |
| Fate: | Sold back to owners, 31 May 1919 |
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United Kingdom
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| Name: | SS Riviera |
| Owner: | South East and Chatham Railway/Southern Railway |
| Acquired: | 31 May 1919 |
| Fate: | Sold, 1932 |
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United Kingdom
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| Owner: | Burns & Laird Lines |
| Port of registry: | Glasgow |
| Acquired: | 1932 |
| Renamed: | RMTS Laird's Isle |
| Fate: | Leased by the Royal Navy, 28 August 1939 |
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United Kingdom
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| Name: | HMS Laird's Isle |
| Acquired: | 28 August 1939 |
| Reclassified: | Landing Ship, Infantry (LSI (H)), 1944 |
| Fate: |
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| General characteristics (as of 1918) | |
| Type: | Seaplane carrier |
| Tonnage: | 1,675 gross register tons (GRT) |
| Displacement: | 2,550 long tons (2,590 t) (deep load) |
| Length: | 323 ft (98.5 m) |
| Beam: | 41 ft (12.5 m) |
| Draught: | 13 ft 8 in (4.2 m) |
| Installed power: |
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| Propulsion: |
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| Speed: | 20.5 knots (38.0 km/h; 23.6 mph) |
| Range: | 1,250 nmi (2,320 km; 1,440 mi) at 15 knots (28 km/h; 17 mph) |
| Complement: | 197 |
| Armament: | |
| Aircraft carried: | 4 × seaplanes |
HMS Riviera was a seaplane tender which served in the Royal Navy (RN) during World War I and World War II. Converted from the cross-Channel packet ship SS Riviera, she was initially fitted with temporary hangars for three seaplanes for aerial reconnaissance and bombing missions in the North Sea. She participated in the unsuccessful Cuxhaven Raid in late 1914 before she began a more thorough conversion in 1915 that increased her capacity to four aircraft. Riviera and her aircraft then spent several years spotting for British warship bombarding the Belgian coast and making unsuccessful attacks on targets in Germany. She was transferred to the Mediterranean in 1918 and returned to her owners the following year.
Sold in 1932 and renamed RMTS Laird's Isle for service in the Irish Sea, she was requisitioned again in 1939 by the Admiralty for service as an armed boarding vessel to enforce the British blockade of Germany. The ship became a training ship in 1940 and was then converted in 1944 into a troop transport for amphibious landings. HMS Laird's Isle was returned to her owners after the war and resumed her service in the Irish Sea until she was sold for scrap in 1957.
Riviera had an overall length of 323 feet (98.5 m), a beam of 41 feet (12.5 m), and a mean draught of 13 feet 8 inches (4.2 m). She displaced 2,550 long tons (2,590 t) at deep load and was rated at 1,675 gross register tons (GRT). Each of the ship's three sets of direct-drive steam turbines drove one propeller shaft. The ship's six Babcock & Wilcox boilers generated enough steam to produce 11,000 shaft horsepower (8,200 kW) from the turbines, enough for a designed speed of 20.5 knots (38.0 km/h; 23.6 mph). She made a speed of 23 knots (43 km/h; 26 mph) during her sea trials with 11,393 shaft horsepower (8,496 kW).Riviera carried 400 tonnes (390 long tons) of coal, enough to give her a range of 1,250 nautical miles (2,320 km; 1,440 mi) at 15 knots (28 km/h; 17 mph).
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