The Yarrow M class was a class

Ship class

A ship class is a group of ships of a similar design. This is distinct from a ship-type, which might reflect a similarity of tonnage or intended use. For example, the is a nuclear aircraft carrier of the Nimitz class....

 of ten destroyers built for the Royal Navy

Royal Navy

The Royal Navy is the naval warfare service branch of the British Armed Forces. Founded in the 16th century, it is the oldest service branch and is known as the Senior Service...

 that saw service during World War I

World War I

World War I , which was predominantly called the World War or the Great War from its occurrence until 1939, and the First World War or World War I thereafter, was a major war centred in Europe that began on 28 July 1914 and lasted until 11 November 1918...

. They were generally similar to the standard Admiralty M class, but were instead designed by the builder, Yarrow & Company

Yarrow Shipbuilders

Yarrow Limited , often styled as simply Yarrows, was a major shipbuilding firm based in the Scotstoun district of Glasgow on the River Clyde...

. Generally, they had two instead of three shafts, as well as two funnels and a straight stern, with the bridge set well back from the forecastle. The first trio were two knots faster than the Admiralty M type, despite less installed power and one less shaft; the installed power was increased for the later vessels. Jane's Fighting Ships

Jane's Fighting Ships

Jane's Fighting Ships is an annual reference book of information on all the world's warships arranged by nation, including information on ship's names, dimensions, armaments, silhouettes and photographs, etc...

 describes the class as "very successful boats", and all ten vessels survived throughout the war to be broken up during the 1920s. Moon, Mounsey and Musketeer were each fitted to carry a kite balloon.

Pre-war ships purchased 1913

Three vessels already building by Yarrow were purchased in March 1913 as part of the pre-war 1913-14 programme. - Begun October 1912, launched 27 May 1914, and completed August 1914. Sold for breaking up 26 October 1921. - Begun October 1912, launched 6 August 1914, and completed October 1914. Sold for breaking up 31 August 1920. - Begun October 1912, launched 12 October 1914, and completed November 1914. Sold for breaking up 26 October 1921.

Ships ordered under the War Emergency Programme

Four vessels were ordered in September 1914. - Begun September 1914, launched 23 April 1915, and completed June 1915. Sold for breaking up 9 May 1921. - Begun September 1914, launched 26 June 1915, and completed August 1915. Sold for breaking up 1 December 1921. - Begun September 1914, launched 11 September 1915, and completed November 1915. Sold for breaking up 8 November 1921. - Begun September 1914, launched 12 November 1915, and completed December 1915. Sold for breaking up 25 November 1921.
One vessel was ordered in early November 1914. - Begun November 1914, launched 9 February 1916, and completed March 1916. Sold for breaking up 15 November 1921.
Two vessels were ordered in May 1915. - Begun May 1915, launched 15 April 1916, and completed May 1916. Sold for breaking up 5 November 1926. - Begun May 1915, launched 14 June 1916, and completed September 1916. Sold for breaking up 13 July 1926.

Seven destroyers to an amended Yarrow design were ordered in August 1915 and later (see Yarrow Later M-class destroyer

Yarrow Later M class destroyer

The Yarrow Later M class were a class of seven destroyers built for the Royal Navy that saw service during World War I. They were based on the preceding and successful Yarrow M class with minor alterations; notably reduced beam to compensate for increased displacement and a sloping stern...

).