HMS Gleaner (H86)
HMSML Gleaner in the Solent, 2013
|Name:||Her Majesty's Survey Motor Launch Gleaner|
|Launched:||18 October 1983|
|Sponsored by:||Mrs. M. Read|
|Commissioned:||5 December 1983|
|Decommissioned:||16 February 2018|
|Homeport:||HMNB Devonport, Plymouth|
|Displacement:||22 tonnes (22 long tons; 24 short tons)|
|Length:||14.8 m (48 ft 7 in)|
|Beam:||4.7 m (15 ft 5 in)|
|Draught:||1.6 m (5 ft 3 in)|
|Propulsion:||2 × Volvo Penta TAMD 122 P-A diesel engines|
|Speed:||14 knots (26 km/h; 16 mph)|
|Complement:||9 (2 Officers, 1 Senior Rate, 6 Junior Rates)|
|Notes:||Uses multibeam and sidescan sonar to collect accurate data about the texture of the seabed. Can be used in the shallowest of inshore waters.|
HMSML Gleaner (H86) was the smallest commissioned vessel in the Royal Navy, at the time of her decommissioning, with a length of just under 15 metres and a ship's company of just nine (two officers, one Senior Rating and six Junior Ratings). She was based in Devonport, Plymouth. The ship prefix "HMSML" stands for Her Majesty's Survey Motor Launch.
Gleaner was the sixth ship to bear the name and was commissioned on 5 December 1983. With a top speed of 14 knots (26 km/h; 16 mph), Gleaner was designed to conduct inshore surveys along the south coast of England, though she has since surveyed all around the coastline of Great Britain and visited various ports in Europe.
As an advanced survey vessel, Gleaner possessed an array of sophisticated technology, including multibeam and sidescan sonar to collect bathymetry and seabed texture data and compile an accurate and detailed picture of the seabed for later analysis. Her survey equipment also included an Applanix POS MV system for georeferencing and motion compensation, C-NAV GPS, Kongsberg EM2040 Multibeam Echo Sounder and Kongsberg EA400 Singlebeam Echo Sounder.
Gleaner also has the distinction of being one of a handful of Royal Navy ships to have visited landlocked Switzerland, having travelled up the Rhine to Basle in 1988. Earlier visits were by HMS Flintham and Dittisham in 1969, and HMS Sabre and Cutlass in 1979.
In 2016, Gleaner conducted an extensive survey of the Firth of Forth as part of the preparation work for the departure of HMS Queen Elizabeth in the spring of 2017. This work was necessary as the most recent survey was 60 years old.
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