A- and B-class destroyer

Basilisk, 21 October 1937
Class overview
Name	A and B class
Operators	Royal Navy  Royal Canadian Navy  Royal Hellenic Navy
Preceded by	Ambuscade and Amazon
Succeeded by	C and D class
Subclasses	A, B
Built	1928–1931
In service	1930–1945
Completed	20
Lost	10
Scrapped	10
General characteristics (as built)
Type	Destroyer
Displacement	1,350–1,360 long tons (1,370–1,380 t) (standard) 1,778–1,790 long tons (1,807–1,819 t) (deep load)
Length	323 ft (98 m) (o/a)
Beam	32 ft 3 in (9.83 m)
Draught	12 ft 3 in (3.73 m)
Installed power	3 × Admiralty 3-drum boilers 34,000 shp (25,000 kW)
Propulsion	2 × shafts; 2 × geared steam turbines
Speed	35 knots (65 km/h; 40 mph)
Range	4,800 nmi (8,900 km; 5,500 mi) at 15 knots (28 km/h; 17 mph)
Complement	138
Armament	4 × single 4.7 in (120 mm) guns 2 × single 2 pdr (40 mm (1.6 in)) AA guns 2 × quadruple 21 in (533 mm) torpedo tubes
General characteristics Saguenay and Skeena (where different)
Displacement	1,337 long tons (1,358 t) (standard) 1,805 long tons (1,834 t) (deep load)
Length	321 ft (98 m) (o/a)
Draught	12 ft 3 in (3.73 m)
Propulsion	32,000 shp (24,000 kW)
Range	5,000 nmi (9,300 km; 5,800 mi) at 15 knots
General characteristics Codrington (A-class flotilla leader)
Displacement	1,540 long tons (1,560 t) (standard) 2,012 long tons (2,044 t) (deep load)
Length	343 ft (105 m) (o/a)
Beam	33 ft 9 in (10.29 m)
Installed power	39,000 shp (29,000 kW)
Complement	185
Armament	5 × single 4.7 in guns
Notes	(where different)
General characteristics Keith (B-class flotilla leader)
Displacement	1,400 long tons (1,400 t) (standard) 1,821 long tons (1,850 t) (deep load)
Complement	157
Notes	(where different)

The A- and B-class destroyers were a group of 18 destroyers built for the Royal Navy during the late 1920s, with two additional ships built for the Royal Canadian Navy. The British ships were divided into two flotillas of eight destroyers, each with a flotilla leader.