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Commando Helicopter Force
Commando Helicopter Force
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Commando Helicopter Force
Commando Helicopter Force Merlin HC3/3A and Wildcat AH1
Active
  • 1997 – present
Country United Kingdom
Branch Royal Navy
TypeForce headquarters
RoleAir support to the UK Commando Force
Sizec. 700 personnel
Part of
Home stationRNAS Yeovilton
NicknameThe Junglies
Aircraft
WebsiteOfficial website
Commanders
Current
commander		Colonel Will Penkman Royal Marines

Commando Helicopter Force (CHF) is a unit of the Royal Navy Fleet Air Arm and an element of the Joint Aviation Command of the British Armed Forces. Its primary role is to provide helicopter support to the UK Commando Force and other UK force elements in the amphibious environment. CHF uses a combination of transport helicopters based at Royal Naval Air Station Yeovilton in Somerset, England.

Endearingly referred to as 'The Junglies' due to their activities in Borneo throughout the 1960s, the Commando Helicopter Force comprises three squadrons: 845, 846, and 847 Naval Air Squadrons. Collectively, they operate the AW-101 Merlin HC4/4A and the AW-159 Wildcat AH1 to deliver air support to the UK Commando Force and various other UK forces. Their roles encompass battlefield reconnaissance, joint fire support, and the training of aircrew and engineers for frontline operations, with expertise in maritime, Arctic, and desert environments.[1]

History

[edit]
A Lynx AH7 of the type previously used by the Commando Helicopter Force

The Commando Helicopter Force was formed in 1997 to consolidate command and control of the various Fleet Air Arm and Royal Marines helicopter squadrons which supported 3 Commando Brigade under Flag Officer Naval Aviation.[2]

In 1999, CHF merged with various Royal Air Force (RAF) and Army Air Corps force elements under the Joint Helicopter Command, whilst maintaining its identity as a formed unit.[3]

Elements of the force have operated in Northern Ireland (until 2002), Sierra Leone in 2000 and Bosnia; and it was an element of the amphibious force for Operation Telic, the British involvement in the 2003 invasion of Iraq, notably supporting the landings to secure the Al-Faw Peninsula.[4] CHF was also a major part of Joint Helicopter Command's contribution to Operation Herrick in Afghanistan.[5]

Following the Strategic Defence and Security Review of 2010, the decision was made to transfer all RAF Merlin HC3 helicopters to the Royal Navy under the command and control of Commando Helicopter Force. On 30 September 2014, the aircraft were formally handed over from the RAF to the Royal Navy; with the first Royal Navy Merlin squadron, 846 Naval Air Squadron, standing up concurrently and relocating from RAF Benson to RNAS Yeovilton on 26 March 2015 and 845 Naval Air Squadron doing likewise the year after.[6]

Sea King HC4 'Junglies' from 846 Naval Air Squadron insert Royal Marines into the Birrim forest Ghana during 2004

The Merlin HC3 replaced the ageing Sea King HC4 as CHF's medium-lift transport aircraft when the Sea King HC4 retired on 31 March 2016.[7]

As part of the transfer of service, the Merlin HC3 underwent an upgrade to the HC4 standard which includes a full mid-life upgrade of the airframe and avionics; and 'marinised' or more accurately optimised the aircraft for ship-borne amphibious operations.[8]

Location

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It is based at Royal Naval Air Station Yeovilton in Somerset, England; aircraft are regularly deployed with UK Commando Forces, overseas and to the ships of the Joint Expeditionary Force (Maritime) (JEF(M)).[9]

Aircraft of the Commando Helicopter Force can be accommodated on the Queen Elizabeth class aircraft carriers as well as some vessels of the Royal Fleet Auxiliary.[10]

Command and control

[edit]

CHF is a Fleet Air Arm asset and as such remains under the Full Command (FULLCOM) of the First Sea Lord, whilst Operational Command (OPCOM) is delegated to the Joint Aviation Command, under Army HQ, who will task assets in accordance with Permanent Joint Headquarters (PJHQ) or Front Line Command requirements.[11]

Organisation

[edit]
Two Commando Helicopter Force Merlin HC3 from 846 Naval Air Squadron on exercise with Royal Marine Commando's near Harstad in Norway

The Commando Helicopter Force has three Naval Air Squadrons with separate roles:

An Aviation Combat Service Support (ACSS) Squadron and Commando Mobile Air Operations Team (Cdo MAOT) also form part of CHF.[15]

845 and 846 NAS received Merlin HC3/3As to replace the retiring Sea Kings HC4s in 2014 and 2015. 846 NAS took their Merlin HC3s on 30 September 2014; 845 NAS followed on 9 July 2015. These are being upgraded to the Merlin Mk4/Mk4A as part of the Merlin Life Sustainment Programme (MLSP).[16] The Merlin HC4 has a grey colour scheme, not the dark green colour of the "Junglie" Sea Kings.[17]

Concurrently, 847 NAS has come to the end of the process of upgrading to the AgustaWestland AW159 Wildcat.[18]

845 Naval Air Squadron

[edit]
A Merlin HC4 wearing the current grey colour scheme used by the Commando Helicopter Force

845 NAS operated the Westland Sea King HC4 helicopter; a variant that has been specially modified for medium-lift transport and flying in all sorts of weather conditions and terrains. 845 had at least two of it Sea Kings deployed to the Bosnian theatre since 1992. Besides Bosnia, they have operated in Albania, Egypt, Honduras, Nigeria, Sierra Leone, Iraq and Afghanistan. 845 NAS was temporarily stationed at RAF Benson in Oxfordshire as part of the Merlin transition until it relocated back to RNAS Yeovilton on 20 June 2016.[19]

846 Naval Air Squadron

[edit]

846 NAS operates with 845 NAS, but has not seen action in Bosnia, being more focused on the Northern flank of the NATO theatre. Until recently, 846 maintained a base in Northern Ireland that allowed it to become very proficient in cold weather and winter operations. However, squadron operations are not limited to northern flying conditions and it has operated in South East Asia, Australia, the United States, and Germany. Two of the squadron's aircraft were sent to Turkey following the major earthquake it suffered in November 1999. 846 NAS was temporarily stationed at RAF Benson in Oxfordshire as part of the Merlin transition until it relocated back to RNAS Yeovilton on 26 March 2015.[6]

In March 2016, 846 NAS was given the role of Maritime Counter Terrorism after the disbandment of 848 Naval Air Squadron and its Sea King HC4 helicopters.[5]

847 Naval Air Squadron

[edit]
A Wildcat AH1 of the Commando Helicopter Force

847 NAS operates Wildcat AH1 helicopters, in light transport, control of joint fires, and reconnaissance roles.[18]

Decommissioned Unit

[edit]

848 Naval Air Squadron

[edit]

848 Naval Air Squadron was the Commando Sea King HC4 training unit for the CHF, and trained not only the aircrews but also the ground crews. In addition to the skills necessary to fly their missions, Commando Helicopter Force members are trained in small-arms use as well as tactics and survival fieldcraft. Being a naval unit that was directly tasked with supporting the Royal Marines, trainees are also schooled in shipboard and amphibious assault operations. A special unit within 848 Squadron, M Flight, was tasked with supporting the Special Boat Service (SBS) in their operations. 848 NAS disbanded in 2013 but then reformed on 1 May 2015 to continue operating the Sea Kings, maintaining operational capability within the CHF while 845 NAS converted to the Merlin, until the Sea King reached its planned out of service date on 31 March 2016.[17][20] 848 NAS disbanded 24 March 2016.[21]

Personnel

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Aircrew, recruited from the Fleet Air Arm and Royal Marines, join the force having completed training in helicopter operations under No. 1 Flying Training School[22] at RAF Shawbury.[23]

See also

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References

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[edit]
Revisions and contributorsEdit on WikipediaRead on Wikipedia

Commando Helicopter Force

View on Grokipedia
from Grokipedia
The Commando Helicopter Force (CHF) is a specialist unit of the Royal Navy's dedicated to delivering rotary-wing aviation support to the Royal Marines' 3 Commando Brigade. Comprising three naval air squadrons—845, 846, and 847—the CHF operates primarily from Royal Naval Air Station Yeovilton and employs HC4 medium-lift helicopters for troop transport and assault support, alongside AH1 aircraft for armed reconnaissance and light utility roles. Formed in 1997 to unify of helicopter assets previously dispersed across squadrons with roots in World War II-era aviation units, the CHF specializes in amphibious operations, enabling rapid insertion of forces in littoral environments. Nicknamed the "Junglies" from intensive support during the 1960s Borneo confrontations, the force has transitioned from legacy platforms to modernized Merlins achieving full operational capability in upgrades as recent as , enhancing survivability and mission versatility in contested battlespaces. Its defining characteristics include rigorous for , enabling operations in austere conditions, and integration with joint forces for , underscoring the Royal Navy's emphasis on agile, sea-based .

Formation and Early History

Origins in Borneo and the 'Junglies' Era

The , also known as the Borneo Confrontation, erupted in December 1962 when Indonesian forces supported a against the Sultanate's pro-Malaysia stance, escalating into cross-border incursions into Malaysian territory in until August 1966. helicopter squadrons played a pivotal role in supporting British and Commonwealth ground forces, particularly the Royal Marines, by providing rapid troop insertion, extraction, resupply, and in dense jungle terrain where traditional overland movement was impractical. These operations marked the genesis of specialized commando helicopter support, predating the formal establishment of the Commando Helicopter Force by over three decades. The precursor units to the modern Commando Helicopter Force were squadrons equipped with helicopters, reformed or deployed specifically for the theater. 845 Naval Air Squadron (NAS), the first such "Junglie" unit, reformed on 10 April 1962 with Wessex HAS.1 aircraft and was immediately committed to operations in and following the initial Indonesian incursions. Similarly, 846 NAS and 848 NAS operated in the region, rotating detachments from carriers like HMS Albion and HMS Bulwark to bases such as , conducting hundreds of sorties to ferry infantry patrols across rivers and ridgelines while evading hostile fire and harsh environmental conditions. Ground troops, including Royal Marine commandos from 40 and , dubbed these squadrons the "Junglies" due to their expertise in low-level flying, night operations, and adaptation to , monsoons, and limited landing zones—capabilities that distinguished them from standard naval air units. Key engagements underscored the squadrons' tactical value; for instance, in 1964–1965, helicopters enabled swift responses to Indonesian incursions near the border, inserting teams and spotters that helped contain guerrilla threats without large-scale ground battles. The operations resulted in 16 aircrew fatalities across the Junglie squadrons, highlighting the risks of operating in contested airspace with rudimentary navigation aids and vulnerability to small-arms fire. By 1966, as the confrontation wound down, these squadrons had demonstrated the necessity of dedicated rotary-wing assets integrated with commando units, evolving from ad hoc detachments under 3 Commando Brigade Air Squadron into a doctrinal cornerstone for amphibious and . This era cemented the "Junglies" ethos of versatility and , influencing subsequent aviation structure despite the units' initial designation as temporary elements rather than a permanent force.

Establishment as a Formal Force in 1997

The Commando Helicopter Force was formally established in 1997 to consolidate over helicopter squadrons dedicated to supporting the Royal Marines' 3 Commando Brigade, addressing previous fragmentation in aviation assets for amphibious and commando operations. This unification centralized rotary-wing support under a single entity within the , enhancing operational efficiency and integration with ground forces that had relied on dispersed units during prior engagements. The formation incorporated three key naval air squadrons—845 Naval Air Squadron, 846 Naval Air Squadron, and 847 Naval Air Squadron—headquartered at Royal Naval Air Station Yeovilton in . These squadrons, previously operating independently or in loose coordination, provided specialized capabilities including assault transport and , primarily using and helicopters suited to the demands of rapid deployment and littoral environments. This structural change preceded the broader Joint Helicopter Command by two years and formalized the evolution from earlier informal arrangements, such as the Royal Marines' 3 Commando Brigade Air Squadron (redesignated 847 NAS in 1995), into a cohesive force optimized for joint naval-commando missions. The establishment emphasized self-contained adaptability, allowing CHF to function as a deployable "unit of action" while maintaining alignment with priorities.

Role and Strategic Importance

Primary Missions and Capabilities

The Commando Helicopter Force (CHF) provides rotary-wing aviation support to the Royal Marines' 3 Commando Brigade, enabling amphibious assault, expeditionary operations, and littoral manoeuvre worldwide. Its primary missions encompass the insertion, extraction, and tactical transport of commando troops and equipment into contested environments, often from maritime platforms or forward operating bases. This includes rapid reaction deployments for raids, rescues, and sustained operations in extreme conditions such as winters, terrain, or expanses. Key capabilities include battlefield , primarily executed by the AH1 helicopter equipped with advanced sensors for scouting ahead of ground forces and directing joint fires, including missile strikes, air raids, and naval gunfire. The HC4 helicopter delivers versatile air mobility, supporting troop carriage of up to 24 personnel, underslung load transport, and utility roles like , while maintaining high readiness for global deployment within hours. Additionally, CHF assets provide anti-armour and , integrating with ground elements to neutralize threats and facilitate commando advances. These missions demand specialized training for aircrew in low-level flying, night operations, and adverse weather, ensuring seamless integration with tactics for forcible entry and sustained combat. CHF's operational flexibility extends to joint exercises with allies, honing capabilities in multi-domain scenarios like high-intensity Arctic warfare or Indo-Pacific reconnaissance strikes.

Integration with Royal Marines and Joint Operations

The Commando Helicopter Force (CHF) provides dedicated aviation support to 3 Commando Brigade , enabling amphibious assaults, rapid troop insertions, and logistical sustainment in expeditionary operations. CHF squadrons operate and helicopters to deliver capabilities including , , and , tailored to the brigade's commando role across varied terrains from to jungle environments. Aircrew and support personnel from the integrate closely with units through specialized training that emphasizes operations in hostile and austere conditions, ensuring interoperability during joint maneuvers. This alignment allows CHF to accompany 3 Commando Brigade on deployments, providing organic airlift and enhancing the brigade's mobility without reliance on external assets. In joint operations, CHF contributes to multinational exercises and combat missions, such as annual training in , where helicopters facilitate insertions for simulated raids and ground attacks. CHF elements also supported Joint Helicopter Force () from 2009 to 2011, with Mk4 helicopters conducting over 2,000 sorties for troop transport and before their final mission on October 14, 2011. Recent upgrades to helicopters have achieved full operating capability for worldwide vessel embarkation as of April 2025, bolstering CHF's role in littoral and joint environments.

Organization and Command Structure

Active Naval Air Squadrons

The Commando Helicopter Force maintains three active naval air squadrons, each specialized for amphibious assault support to commando operations: 845, 846, and 847 Naval Air Squadrons, all based at Royal Naval Air Station Yeovilton. These units provide rotary-wing aviation capabilities including troop insertion, , and fire support, integrated within the UK's Joint Aviation Command.
SquadronPrimary AircraftKey Roles
845 Naval Air Squadron HC4/4A (approximately 6-8 aircraft)Medium-lift , troop transport (up to 24 personnel per aircraft), and utility support in amphibious and littoral environments; supports and conflict operations with over 230 personnel. In 2025, the squadron participated in global deployments, including 25 exercises and front-line preparation in varied terrains.
846 Naval Air Squadron HC4/4AFrontline medium-lift operations mirroring 845 NAS, emphasizing rapid troop maneuver and sustainment for forces; one of two primary -equipped units in CHF. The squadron conducted pre-deployment training in 2025, including contested environment simulations in and winter exercises in .
847 Naval Air Squadron AH1 (8 aircraft)Armed , light , anti-armour strikes via missiles, and battlefield utility; equipped for target designation and joint fires in support of 3 Commando Brigade. In 2025, it executed warfare training during Exercise , desert operations in the Sonoran region, and live-fire qualifications at .
These squadrons rotate operational commitments, ensuring continuous readiness for expeditionary tasks, with platforms handling heavy lift and Wildcats providing agile, sensor-equipped overwatch. Transition to upgraded HC4 variants enhances endurance and payload for future littoral response missions.

Decommissioned Units and Transitions

The Commando Helicopter Force decommissioned 848 Naval Air Squadron on 24 March 2016, coinciding with the retirement of the HC.4 after 36 years of service supporting operations. This squadron had been reformed in May 2015 specifically to maintain operations during the transition period, after an initial disbandment in December 2013 when it served as the primary training unit for the type. The final seven were phased out by 31 March 2016, ending their role in assault missions for the force. This decommissioning facilitated the full transition of CHF's heavy-lift capabilities to the Merlin HC.3/3A, acquired from the Royal Air Force between 2014 and 2015. 846 Naval Air Squadron stood up in 2015 at with the transferred s, marking the initial operational conversion, while 845 Naval Air Squadron completed its shift from Sea Kings to s by 2018, returning to RNAS Yeovilton. These aircraft underwent upgrades to the HC.4 standard, enhancing survivability and mission systems for commando support roles. Parallel to the Merlin integration, 847 Naval Air Squadron transitioned from the AH.7 to the AH.1 for and light utility tasks, with the entering service in the early to provide improved sensors and anti-armour capabilities. No additional squadrons have been decommissioned since 2016, though planned formations like a dedicated Mk.2 unit under 849 NAS were cancelled in 2020 amid force restructuring. These changes streamlined CHF to three active squadrons, emphasizing with modern platforms while preserving its expeditionary focus.

Command and Control Mechanisms

The (CHF) maintains administrative command within the Royal Navy's , headquartered at Royal Naval Air Station Yeovilton, where the CHF Commander oversees the integration of its three naval air squadrons (845, 846, and 847 NAS) to deliver aviation support tailored to commando requirements. This structure ensures that helicopter operations align with 3 Commando Brigade's tactical needs, including troop transport, reconnaissance, and , through embedded liaison officers and shared operational planning cycles. Operationally, CHF deploys as Joint Helicopter Force 2 (JHF 2) under the Joint Helicopter Command (JHC), a tri-service entity that coordinates battlefield helicopter assets across the , , and for joint air-land integration. mechanisms emphasize delegated operational control (OPCON) to task force commanders during amphibious or expeditionary missions, with CHF providing real-time aviation tasking via robust communication networks and forward air controllers embedded with ground units. This setup supports scalable responses, from squadron detachments under brigade-level direction to full force employment under a headquarters. In amphibious scenarios, CHF functions as , the dedicated helicopter coordination headquarters, directing and assets within the littoral manoeuvre framework while maintaining naval chain-of-command linkages to the Commander Amphibious Forces. These mechanisms incorporate standardized joint doctrine for air manoeuvre, including predefined and deconfliction protocols to mitigate risks in contested environments, as evidenced in exercises like those preparing for Norwegian winter deployments in 2025.

Bases and Operational Locations

Primary Bases and Facilities

The primary base for the Commando Helicopter Force (CHF) is Royal (RNAS) Yeovilton, located in , . Established as one of the Royal Navy's two principal air bases, Yeovilton serves as the operational hub for CHF's three naval air squadrons—845, 846, and 847 Naval Air Squadrons—which provide rotary-wing support to the Royal Marines' 3 Commando Brigade. The station hosts over 100 aircraft across front-line and training units, including CHF's Mk4/4a and AH1 helicopters, enabling maintenance, crew training, and rapid deployment readiness. RNAS Yeovilton encompasses two main sites: the primary Yeovilton airfield for flight operations and a secondary facility at Merryfield (in Ilton), which supports helicopter logistics and auxiliary functions. These facilities include specialized hangars for heavy-lift maintenance, simulation centers for commando-specific assault tactics, and infrastructure for integrating with Joint Helicopter Command elements. As of 2025, Yeovilton's co-location of CHF squadrons with training assets has enhanced operational capability, allowing for seamless transitions from simulation to live and amphibious exercises. While CHF maintains forward-operating postures abroad—such as rotational detachments to for warfare training—these are temporary and subordinate to Yeovilton's core infrastructure, which ensures year-round sustainment and high-readiness commitments. No other permanent bases host CHF's primary squadrons or command elements.

Deployment Postures and Mobility

The Commando Helicopter Force maintains a high state of readiness for global deployment at short notice, supporting in amphibious and expeditionary operations from its base at RNAS Yeovilton. This posture emphasizes rapid response as part of the UK's high-readiness amphibious forces, enabling tactical mobility from sea or land platforms to insert forces into contested environments. Rapid deployment capabilities center on from Mk4 and AH1 helicopters, allowing commandos to descend onto moving ships or hostile terrain for immediate action. The Mk4, capable of carrying up to 24 troops, incorporates a specialized beam for insertions and has undergone trials extending its range by up to two hours via auxiliary fuel tanks or boosting payload by an additional 12 personnel for deeper littoral strikes. These enhancements, tested through over 350 deck landings on vessels like HMS Albion in challenging conditions such as Norwegian fjords, bolster endurance and flexibility in constrained maritime spaces. CHF's mobility integrates with naval assets, including Queen Elizabeth-class carriers and amphibious ships, facilitating ship-to-shore transitions and coordination within Littoral Response Groups. Versatile across extremes—from Arctic exercises in to desert and jungle operations—the force sustains agile postures for joint helicopter commands, ensuring seamless support for commando raids and sustained inland advances.

Equipment and Technological Profile

Current Helicopter Fleet

The Commando Helicopter Force's current fleet primarily comprises the variants for heavy-lift assault operations and the for reconnaissance and light support roles. These helicopters support amphibious insertions, troop transport, and combat enabling functions for the Royal Marines. The HC4/4a fleet consists of 25 , upgraded from 19 HC3 and six HC3a models, achieving full operating capability on January 29, 2025. These upgrades include a new mission planning system, enhanced , and compatibility for operations from aircraft carriers, Type 23 frigates, and Type 31 vessels, enabling global littoral and maritime support. Operated by 845 and 846 Naval Air Squadrons, the provides rapid troop deployment for up to 24 personnel, capabilities, and endurance for extended missions in contested environments. Complementing the , the AH1, flown by 847 Naval Air Squadron, delivers armed , target designation, anti-armour strikes, and utility lift in support of commando forces. Equipped with missiles such as and Sea Venom, a 12.7mm , and advanced electro-optical systems, it operates in extreme conditions for and joint fires integration. Deployments typically involve small formations of three to four for exercises like CLOCKWORK 2025, emphasizing and high-threat . This dual-fleet structure ensures versatile aviation support, with s handling bulk assault and Wildcats providing agile overwatch, as demonstrated in recent NATO-aligned evolutions.

Upgrades and Modernization Efforts

The Commando Helicopter Force underwent significant modernization through the upgrade of its helicopter fleet, converting 19 Mk3 and six Mk3a variants to the Mk4 and Mk4a standards. This £330 million program, announced in 2015, repurposed former Merlins for naval commando operations, incorporating enhancements such as a folding main rotor head and tail pylon to enable two aircraft to fit on a single carrier lift, thereby improving efficiency aboard Queen Elizabeth-class carriers. Additional upgrades included advanced cockpit , a new Mission Planning System, and ship-optimized modifications to enhance amphibious support capabilities. These changes extended the fleet's operational life to at least 2030 and supported air maneuver for forces. Full operating capability was declared on January 29, 2025, following trials that validated increased range or payload options for the helicopters. The integration of the Wildcat AH1 helicopter via 847 Naval Air Squadron further modernized CHF's light utility and roles, replacing the fleet with aircraft entering service from 2015. s provide armed , light troop transport, and integration with joint forces, as demonstrated in recent training exercises. Ongoing efforts align with broader transformations, though specific helicopter procurements like the remain under evaluation for potential replacement of legacy platforms beyond the Merlin's service life.

Major Operations and Deployments

Historical Engagements (Post-WWII to )

The introduction of helicopter capabilities to support for commando operations marked a significant evolution post-World War II, with squadrons later forming the core of the Commando Helicopter Force providing aviation lift, reconnaissance, and insertion for . Early engagements highlighted the pioneering role of helicopters in amphibious assaults, transitioning from models to more advanced platforms like the by the 1970s. These units operated in diverse theaters, adapting to counter-insurgency, , and demands. During the Suez Crisis in November 1956, Westland Whirlwind helicopters embarked on HMS Theseus ferried elements of 45 Royal Marine Commando ashore at as part of Operation , executing the first-ever large-scale helicopter-borne assault with approximately 200 troops landed in the initial waves starting at dawn on 5 November. This operation demonstrated the feasibility of vertical envelopment, bypassing beach defenses and enabling rapid inland penetration despite limited helicopter numbers—around 16 Whirlwinds available across carriers. The tactic influenced future amphibious doctrine, though the overall campaign was politically curtailed after capturing key objectives within days. In the Indonesian Confrontation from 1962 to 1966, squadrons such as 846 Naval Air Squadron, equipped with Westland HAS.7 helicopters, deployed aboard commando carriers like HMS Albion to , conducting troop insertions, casualty evacuations, and reconnaissance in support of British and Commonwealth forces countering Indonesian incursions into and . Similarly, 845 Naval Air Squadron pilots flew operations in , , and , logging extensive hours in environments to resupply forward positions and extract patrols amid harsh terrain and hostile fire. These missions, involving up to a dozen helicopters per carrier task group, sustained operations like those at Long Padawan and contributed to the stabilization of the region by 1966 without major helicopter losses. The Falklands War in 1982 represented the most intense commitment for commando helicopter units, with 846 Naval Air Squadron's nine HC4 helicopters aboard and additional aircraft from 845 Naval Air Squadron supporting the amphibious landings at San Carlos on 21 May, transporting over 2,800 personnel and 1,000 tons of supplies in the initial phases amid heavy anti-aircraft fire. These , configured for troop assault and , flew more than 2,800 sorties total, enabling the rapid buildup of 3 Commando Brigade across and executing vertical maneuvers like the "sideslip" insertion at Douglas Settlement to outflank Argentine defenses. Despite losses, including a fatal crash due to bird strike, the squadrons' endurance—operating from forward sites with minimal maintenance—proved decisive in the ground campaign culminating in the recapture of Stanley on 14 June. Into the 1990s, 845 Naval Air Squadron deployed Sea Kings to Bosnia during the , supporting (UNPROFOR) and subsequent missions by providing utility lift, medical evacuations, and flights from bases like those in the Adriatic or , amid ongoing ethnic conflicts. These operations, spanning 1992–1995, involved coordination with ground elements to deliver and enforce no-fly zones, reflecting the squadrons' shift toward multinational stabilization roles before the formal establishment of the Commando Helicopter Force in 1997.

Post-2000 Operations in Iraq and Afghanistan

The Commando Helicopter Force (CHF) contributed to Operation Telic, the British military intervention in beginning in 2003, primarily through squadrons equipped with HC4 helicopters for troop transport and support to elements of 3 Commando Brigade. 845 Naval Air Squadron operated in until its final mission on 17 2007, after which the unit returned its aircraft to the on 24 2007. Deployments involved providing lift capabilities amid ongoing counter-insurgency efforts, with CHF assets integrated into Joint Helicopter Command operations. A notable incident occurred on 6 May 2006, when a Mk4 from the CHF crashed in , resulting in the loss of five personnel, highlighting operational risks in urban environments. Following the drawdown in Iraq, CHF shifted focus to Operation Herrick in Afghanistan, deploying Sea King HC4 helicopters from late 2007 to support Joint Helicopter Force (Afghanistan). 845 and 846 Naval Air Squadrons rotated detachments starting in March 2008, conducting troop insertions, resupply, and casualty evacuation in rugged terrain, often under threat from improvised explosive devices and small-arms fire. The Sea Kings accumulated significant flight hours, with pilots achieving milestones such as 1,000 operational sorties by May 2011, underscoring the intensity of support to ground forces in Helmand Province. Upgrades, including enhanced door-mounted FN Herstal M3M machine guns, were implemented in 2010 to improve defensive capabilities ahead of 16 Air Assault Brigade rotations. CHF's Sea King operations in Afghanistan concluded with the final mission on 14 October 2011, after which the helicopters returned to the , paving the way for HC3/4 transitions within Joint Helicopter Command. Throughout Herrick, CHF maintained a key role in enabling maneuvers, transporting thousands of personnel and tons of cargo despite environmental challenges like dust and high altitudes that strained older airframes. -equipped elements later supplemented efforts until the 's phase ended in 2014, with CHF adapting from desert to littoral-focused readiness post-withdrawal. These deployments demonstrated CHF's versatility in expeditionary aviation but exposed vulnerabilities in aging fleet sustainment under prolonged tempo.

Recent Exercises and Global Deployments

In early 2025, the Commando Helicopter Force (CHF) participated in Exercise in , focusing on combat readiness with and helicopters conducting operations in extreme cold-weather conditions alongside allies. This deployment tested the force's ability to support in raiding and defensive operations along 's coastline and inland areas, emphasizing rapid response in sub-zero temperatures. Operation Clockwork concluded in March 2025, with CHF assets providing vital battlefield support, including troop insertions and reconnaissance, to multinational forces. Throughout 2024 and into 2025, CHF elements undertook a year-long task group mission supporting operations and exercises across multiple locations, from to , marking one of the longest deployments in the force's history. This included contributions from 845 Naval Air Squadron, which at peak operations deployed seven of its ten helicopters and all personnel across five European sites, earning recognition for global efforts in May 2025. Such missions underscored CHF's role in amphibious coordination, drawing on Mk4 variants upgraded for enhanced global deployability in maritime operations. In September 2025, CHF conducted Exercise Orion Spear on , simulating crisis response with rapid deployment of aerial firepower, troop transport, and integration with ground forces to sharpen . This pre-winter training prepared units for upcoming large-scale exercises in , involving 2 as the UK's helicopter coordination headquarters for amphibious assaults. Earlier in July 2025, Exercise Hades Warrior at involved CHF pilots in joint missions with , Army, and RAF counterparts, honing multi-service helicopter tactics for front-line support. These activities reflect CHF's emphasis on readiness for high-intensity environments without recent major combat engagements.

Personnel and Training

Recruitment, Roles, and Qualifications

Personnel in the Commando Helicopter Force (CHF) are drawn exclusively from the Royal Navy's Fleet Air Arm, with recruitment occurring through standard Royal Navy enlistment pathways for aviation branches rather than direct entry to CHF. Candidates apply to roles such as pilot, observer (aircrew officer), or aircrewman (ratings), undergoing initial Phase 1 training at HMS Raleigh before branch-specific aviation training at RNAS Yeovilton or other sites. Assignment to CHF squadrons—845, 846, or 847 Naval Air Squadron—follows successful completion of flying qualifications and typically involves volunteering followed by selection based on performance, aptitude, and operational needs, with postings lasting 2–3 years. Key roles include pilots responsible for operating Mk4 and AH1 helicopters in assault, utility, and attack missions; observers who direct , , sensors, communications, and weapon systems as mission commanders; and aircrewmen who manage troop handling, winching operations, defensive gunnery, and in-flight emergencies. Ground-based roles encompass air technicians for maintenance and support, ensuring aircraft readiness for expeditionary operations. Collectively, CHF personnel deliver aviation lift, , , and casualty evacuation to 3 Commando Brigade , often in austere environments like amphibious landings or deployments. Qualifications emphasize physical robustness, technical aptitude, and combat readiness, starting with entry criteria: British, Irish, or citizenship; ages 16–39 for ratings and up to 26 for officers; and no serious criminal convictions. officers require minimum GCSEs (grade 4/C or above) in English and Maths, with A-levels or equivalent preferred for aptitude in spatial awareness and multitasking; pilots and observers must pass the Defence Aptitude Assessment, Admiralty Interview Board, and Class 1 medical, including and height standards (typically 5'7"–6'5"). Ratings for aircrewman roles need GCSEs in English and Maths, hand-eye coordination, and a willingness for high-risk duties. All CHF members complete the 13-week , mirroring support training with endurance marches, amphibious drills, and tactical exercises to earn the , enabling seamless integration with commando units under fire. Additional aviation training covers helicopter-specific handling, night operations, and survival at sea.

Specialized Training and Readiness Programs

Personnel assigned to the Commando Helicopter Force (CHF) must complete the (AACC), a 13-week program designed to equip tri-service support personnel with essential commando skills for integration with units. The course emphasizes individual fieldcraft, small unit tactics, weapons handling, and physical endurance tests, including a 9-mile speed march in under 90 minutes carrying 21 pounds and a 12-mile night march with 31 kilograms in under 4 hours. Successful graduates earn the green commando beret, qualifying them for frontline roles alongside 3 Commando Brigade. Aircrew and engineers receive specialized aviation training following commando qualification, focusing on operations in maritime, Arctic, and desert environments with and helicopters. This includes mastery of advanced navigation, , emergency procedures, survival techniques, and battlefield reconnaissance, alongside joint capabilities. For those not pursuing full commando status, a five-week military and skills course provides foundational training. Readiness is maintained through intensive exercises simulating high-threat scenarios, such as the annual Exercise Storm, a three-week program involving over 300 flying hours across , , and allied nations like and . These drills incorporate mountain flying, live firing with 27,000 rounds, troop lifts of 400 personnel, and defense, culminating in qualification for front-line operations. readiness features Operation Clockwork, a week-long course at Bardufoss, , blending classroom instruction with field exercises in sub-zero conditions to ensure operational capability in extreme environments. Additional multinational training, including with the Royal Netherlands , certifies operations and enhances for amphibious assaults.

Challenges, Criticisms, and Future Outlook

Operational and Logistical Challenges

The Commando Helicopter Force (CHF) faces significant operational challenges stemming from its mandate to deliver assured mobility and fire support to in expeditionary and littoral environments, often under contested conditions. Helicopters such as the HC4 must conduct amphibious insertions, troop transports, and casualty evacuations from ships or forward operating bases, requiring precision maneuvers in high-threat areas like denied airspace or GPS-degraded scenarios. In deployments, such as Operation Clockwork, extreme cold, terrain, and reduced visibility complicate engine starts, rotor performance, and navigation, demanding specialized cold-weather adaptations and joint training with assets like attack helicopters. Desert operations in and exposed CHF assets, including legacy Sea Kings and , to dust ingestion, brown-out landings, and high operational tempos, contributing to accelerated wear during missions that logged over 138,000 helicopter flight hours from 2001 to 2011. Logistically, CHF grapples with maintenance-intensive platforms and persistent availability shortfalls. The fleet requires approximately two hours of maintenance per flight hour, with major overhauls every 600 hours taking up to two months, exacerbated by aging airframes that increase downtime as components fatigue. Serviceability rates have historically lagged, with insufficient crewed, operational airframes due to shortages, dilution via simulator reliance, and high personnel turnover—factors cited in reviews as stemming from short postings (18-36 months) and poor work-life balance. Spare parts procurement and defect rectification remain bottlenecks, addressed through contracts like the £399 million Life Sustainment Programme, which upgraded 25 HC3/3A aircraft to HC4/4A standards by integrating folding rotors for ship compatibility and improved defensive aids, yet underscoring prior sustainment strains. These issues have forced reliance on legacy systems like the HC4 until its 2016 retirement, during which its rugged design mitigated some field repairs but could not offset fleet-wide obsolescence.

Budgetary Constraints and Procurement Issues

The UK Ministry of Defence's budgetary constraints, exacerbated by post-2010 defence reviews and competing priorities within the £242 billion equipment procurement and support allocation from 2022 to 2032, have compelled the to rely on life-extension upgrades rather than full fleet replacements. This approach addressed the aging fleet's limitations but deferred costlier new acquisitions, with CHF's 25 HC3/3A helicopters upgraded to HC4/4A standard between 2018 and 2025, achieving full operating capability on 29 January 2025 to extend to at least 2030. The upgrades incorporated enhanced defensive aids, folding rotors, and increased /range capabilities, yet sustained high maintenance demands, as evidenced by a £165 million extension awarded to Leonardo in April 2025 for ongoing fleet support. Procurement challenges for CHF's AH1 helicopters stemmed from the broader Future Lynx programme's developmental delays and cost overruns, with the original £1 billion contract for 34 aircraft (shared between and Army) facing scrutiny for slipping timelines into the mid-2010s. By 2017, CHF operated six Mk1s alongside Merlins, but integration was hampered by initial software and sensor issues, compounded by fiscal pressures that limited additional buys or rapid capability enhancements. These issues reflected systemic MoD procurement inefficiencies, including optimistic cost forecasting and dependency on single suppliers like Leonardo Helicopters (formerly ). Looking ahead, the (NMH) programme—envisioned to replace and Puma across services, including potential CHF transitions—has encountered significant hurdles, downgraded to 'amber' status in 2025 due to schedule delays and budget variances exceeding 5%. Whole-life costs for NMH escalated from £1,172 million to £1,329 million between financial years, attributed to refined requirements and industrial base considerations, delaying contract awards originally anticipated earlier in the decade. Parliamentary evidence highlights government and MoD decisions as primary causes, prioritising alignment with defence industrial strategy over expedited delivery, thereby prolonging CHF's exposure to risks amid rising operational demands. Broader 2024-2025 asset retirements, aimed at saving £500 million for reallocation, underscore these pressures without immediate relief for rotary-wing sustainment.

Strategic Adaptations and Future Developments

In response to evolving maritime and demands, the Commando Helicopter Force has undergone significant modifications to its HC4/4a fleet, declared at full operating capability on 29 January 2025. These upgrades, encompassing 25 aircraft (19 from Mk3 and six from Mk3a variants), incorporate a folding main rotor head and tail assembly, enabling two helicopters to fit on a single carrier aircraft lift for enhanced embarkation efficiency aboard Queen Elizabeth-class vessels. A new mission planning system further bolsters operational flexibility, allowing seamless integration into global deployments with the and support for 3 Brigade's distributed maneuver tactics. These adaptations align with the Royal Marines' doctrine, emphasizing rapid, technology-augmented strikes from the sea against peer adversaries, moving away from large-scale land-based operations prevalent in and . The navalization of the platform addresses prior logistical constraints in amphibious environments, such as limited carrier storage and deck operations in contested waters, thereby restoring organic aviation lift critical for commando raids and troop insertions. Integration with AH1 helicopters for armed escort and roles complements this shift, enabling layered support in high-threat scenarios without reliance on fixed-wing assets. Looking ahead, the Merlin fleet's service life has been extended to 2030 through the Merlin Life Sustainment Programme, ensuring sustained capability amid budgetary pressures and procurement delays for successors. Post-2030 requirements may draw from the competition, potentially incorporating with advanced sensors, unmanned teaming, and reduced acoustic signatures to counter anti-access/area-denial threats. Ongoing exercises, such as those validating carrier-compatible operations in , underscore preparations for , with emphasis on interoperability under the Joint Aviation Command. These developments prioritize empirical enhancements in endurance and survivability over expansive fleet expansions, reflecting causal priorities in resource allocation for credible deterrence.

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