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Naval Warfare

HMS Monmouth (F235)

Guided-Missile Frigate Warship [ 1993 ]

Still in service as of 2014, HMS Monmouth forms a part of the important Type 23 frigate class for the Royal Navy.

Authored By: Staff Writer | Last Edited: 09/30/2021 | Content ©www.MilitaryFactory.com | The following text is exclusive to this site.

HMS Monmouth (F235) is a modern guided-missile frigate of the Type 23 class of surface combatant serving the British Royal Navy. The warship was ordered in July of 1988 and saw her keel laid down by Yarrow Shipbuilders on June 1st, 1989. The vessel was launched to sea on November 23rd, 1991 and formally commissioned into service on September 24th, 1993. Fighting under the motto of "Fear Nothing But God", she maintains an active presence in the British fleet, homeporting out of HMNB Devonport, Plymouth. She is also known by the name of "The Black Duke".

True to her design roots, the warship displaces 5,400 tons (short) and has a running length of 436.3 feet, a beam of 52.9 feet, and a draught of 23.10 feet. Power is through a COmbined Diesel-eLectric-And-Gas (CODLAG) arrangement which sees 4 x Paxman Valenta 12CM diesel generators paired with 2 x GEC electric motors (4,000 horsepower) and 2 x Rolls-Royce Spey SM1C engines (31,100 horsepower) fitted. This allows the ship to make headway at speeds over 28 knots, ranging out to 7,500 nautical miles.

Aboard is a crew of 185 and the ship can be arranged to house some 205 total personnel if needed. It carries the usual missile/torpedo survival systems and Electronic Warfare (EW) suite common to other warships of her type. Armament is 1 x 4.5" Mk.8 turreted gun (over the forecastle), 1 x 32-cell "Sea Wolf" Vertical Launch System (VLS) for Sea Wolf or Sea Ceptor Surface-to-Air Missiles (SAMs), 16 x "Harpoon" anti-ship missiles in twin quad-launchers, 12.75" torpedo tubes in two twin-launcher units, 2 x 30mm DS30 automatic guns, 2 x 7.62mm Gatling-style miniguns, and 4 x 7.62mm General Purpose Machine Guns (GPMGs).

All this makes Monmouth a "multi-mission" vessel capable of undertaking airspace denial, anti-ship/anti-submarine, escort, and general patrolling sorties. The warship has the in-built quality of being able to tackle threats in the air, on the water, or under water with equal lethality.

In addition to its installed systems, the warship has a combination hangar/helipad function over the stern section of the hull. This allows the supporting of one or two medium-lift/utility-minded helicopters which can be equipped for the Ant-Submarine Warfare (ASW) or anti-ship role as well as Search and Rescue (SAR) and at-sea resupply. Those helicopters equipped for submarine/ship hunting carry powerful missiles and torpedoes of their own and offer a critical "eye-in-the-sky", Over-the-Horizon (OtH) advantage.

To date (2019), Monmouth has participated in friendly tours of allied ports and assisted in humanitarian causes. She also undertook anti-piracy actions off of the Somali coast in 2011 and underwent a refit the following year Another Persian Gulf cruise was had in 2013 and another refit followed in 2015.

Despite her Cold War roots, HMS Monmouth remains fairly active in Royal Navy-related fleet actions, keeping viable as a combat platform for the foreseeable future.©MilitaryFactory.com
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Service Year

United Kingdom national flag graphic
United Kingdom

In Active Service.

Type 23-class

HMS Norfolk (F230); HMS Marlborough (F233); HMS Argyll (F231); HMS Lancaster (F229); HMS Iron Duke (F234); HMS Monmouth (F235); HMS Montrose (F236); HMS Westminster (F237); HMS Northumberland (F238); HMS Richmond (F239); HMS Somerset (F82); HMS Grafton (F80); HMS Sutherland (F81); HMS Kent (F78); HMS Portland (F79); HMS St Albans (F83); CHILEAN NAVY: Almirante Cochrane (FF05); Almirante Condell (FF06); Almirante Lynch (FF07)

National flag of the United Kingdom United Kingdom
(OPERATORS list includes past, present, and future operators when applicable)
Offshore Bombardment
Offshore bombardment / attack of surface targets / areas primarily through onboard ballistic weaponry.
Offshore strike of surface targets primarily through onboard missile / rocket weaponry.
Maritime Patrol
Active patroling of vital waterways and maritime areas; can also serve as local deterrence against airborne and seaborne threats.
Airspace Denial / Deterrence
Neutralization or deterrence of airborne elements through onboard ballistic of missile weaponry.
Fleet Support
Serving in support (either firepower or material) of the main surface fleet in Blue Water environments.

436.3 ft
132.98 m
52.9 ft
16.12 m
23.8 ft
7.25 m

Installed Power: 4 x Paxman Valenta 12CM diesel generators developing CODLAG (COmbined Diesel-eLectric-And-Gas): 2,205 shaft horsepower; 2 x GEC electric motors developing 4,000 shaft horsepower; 2 x Rolls-Royce Spey SM1C turbofan developing 31,100 shaft horsepower.
Surface Speed
29.0 kts
(33.4 mph)
7,499 nm
(8,630 mi | 13,889 km)

kts = knots | mph = miles-per-hour | nm = nautical miles | mi = miles | km = kilometers

1 kts = 1.15 mph | 1 nm = 1.15 mi | 1 nm = 1.85 km
1 x 4.5" Mk 8 turreted deck gun.
1 x 32-cell "Sea Wolf" GWS 26 missiles in Vertical Launch System (VLS).
2 x 30mm DS30 automatic guns.
2 x 7.62mm Gatling-style miniguns.
2 x "Harpoon" anti-ship missile launchers in quadruple mountings (8 missiles each; 16 total missiles).
2 x 324mm "Sting Ray" torpedo tubes.
4 x 7.62mm General Purpose Machine Guns (GPMGs).

Supported Types

Graphical image of a modern warship turreted deck gun armament
Graphical image of an aircraft medium machine gun
Graphical image of an aircraft automatic cannon
Graphical image of an aircraft Gatling-style rotating gun
Graphical image of an aircraft aerial torpedo
Graphical image of an aircraft anti-ship missile

(Not all weapon types may be represented in the showcase above)
1 OR 2 x Medium-lift navy helicopter equipped for anti-ship / anti-submarine warfare sorties.

Military lapel ribbon for the Cold War period
Military lapel ribbon for early warship designs
Military lapel ribbon for the Falklands War
Military lapel ribbon for the 1991 Gulf War
Military lapel ribbon for the Korean War
Military lapel ribbon representing modern aircraft
Military lapel ribbon for the Attack on Pearl Harbor
Military lapel ribbon for the Russian Invasion of Ukraine
Military lapel ribbon for the Vietnam War
Military lapel ribbon for the World War 1
Military lapel ribbon for the World War 2

Ribbon graphics not necessarily indicative of actual historical campaign ribbons. Ribbons are clickable to their respective naval campaigns / operations / periods.

Images Gallery

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Image of the HMS Monmouth (F235)
Image from the United States Department of Defense imagery database.

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