M29-class monitor

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Class overview
Name	M29-class monitor
Operators	Royal Navy
Preceded by	M15 class
Succeeded by	Erebus class
Completed	5
Lost	1
Preserved	1
General characteristics
Class and type	Monitor
Displacement	535 tons
Length	170 ft (52 m)
Beam	31 ft (9.4 m)
Draught	6 ft 9 in (2.06 m)
Propulsion	Triple expansion Twin screw propellers Yarrow oil fuel 45 tons boilers 400 hp (300 kW)
Speed	10 knots (19 km/h)
Complement	75
Armament	2 × BL 6-inch (152.4 mm) Mk XII guns 1 × 6-pounder AA 1 × 3-inch (76 mm) AA gun for M31 and M33
Armour	1–3 in magazine box protection 2.25 in belt 1 in deck, turrets and bulkheads

The M29 class comprised five monitors of the Royal Navy, all built and launched during 1915.

The ships of this class were ordered in March, 1915, as part of the Emergency War Programme of ship construction. The contract for construction was granted to Harland & Wolff, Belfast, who sub-contracted the construction of M32 and M33 to Workman, Clark and Company.

The main armament of the ships, two 6-inch Mk XII guns, came from guns originally intended for the five Queen Elizabeth-class battleships which became surplus when their aft casemate mountings turned out to be unworkable and were dispensed with.