Admiralty M-class destroyer
| HMS Pasley | |
| Class overview | |
|---|---|
| Operators | Royal Navy | 
| Preceded by | L class | 
| Succeeded by | R class | 
| Subclasses | |
| Built | 1914–1916 | 
| In commission | 1915–1923 | 
| Completed | 85 | 
| General characteristics | |
| Type | Destroyer | 
| Displacement | |
| Length | 273 ft 4 in (83.3 m) (o/a) | 
| Beam | 26 ft 8 in (8.1 m) | 
| Draught | 8 ft 6 in (2.6 m) | 
| Installed power | 
 | 
| Propulsion | 3 shafts; 1 steam turbine set | 
| Speed | 34 knots (63 km/h; 39 mph) | 
| Range | 3,710 nmi (6,870 km; 4,270 mi) at 15 knots (28 km/h; 17 mph) | 
| Complement | 80 | 
| Armament | 
 | 
The M class, more properly known as the Admiralty M class, were a class of 85 destroyers built for the Royal Navy of United Kingdom that saw service during World War I. All ships were built to an identical – Admiralty – design, hence the class name. Eighteen other vessels which were officially included within the 'M' class were built to variant designs by three specialist builders – 10 by Yarrow, 6 by Thornycroft (who also built another 6 to the standard Admiralty design), and 2 by Hawthorn Leslie; these are covered in other articles.
The Admiralty design was based on the preceding L class but modified to produce an increase in speed by approximately 6 knots (11 km/h; 6.9 mph). All ships built to the Admiralty design had three identical narrow, circular funnels (this did not apply to the 18 ships built by the specialist yards).