Net-class boom defence vessel

Class overview
Name:	Net class
Builders:	Blyth Shipbuilding & Drydock Co. Ltd., Blyth, Northumberland (6) Smiths Dock Co., Ltd., South Bank, North Yorkshire (2) Lobnitz & Co. Ltd., Renfrew (2) Cockatoo Docks and Engineering Co., Sydney (1)
Operators:	Royal Navy  Royal Australian Navy
Built:	1938–1939
In commission:	1939–1958
Completed:	11
Lost:	1
General characteristics
Type:	Boom defence vessel
Displacement:	530 long tons (539 t)
Length:	159 ft 9 in (48.69 m) o/a 135 ft (41 m) p/p
Beam:	30 ft 6 in (9.30 m)
Draught:	9 ft (2.7 m)
Propulsion:	Reciprocating vertical triple expansion engine, 850 ihp (634 kW) 1 shaft
Speed:	11.5 knots (21.3 km/h; 13.2 mph)
Complement:	32
Armament:	1 × 3 in (76 mm) gun

The Net class were a class of boom defence vessels of the Royal Navy and Royal Australian Navy during World War II.

Of the eleven ships of the class ten were built in shipyards in northern England and Scotland, while the eleventh was built in Sydney, Australia. One ship, HMS Bayonet, was lost when it struck a mine in the Firth of Forth on 21 December 1939, probably laid by the U-21 on 4 November.

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