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Mexeflote
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The Mexeflote is a landing raft used by the United Kingdom's Royal Logistic Corps and the Royal Australian Navy to move goods and vehicles between ship and shore. It was first used by British military in the 1960s. It was used during the Falklands War, and has been used in humanitarian aid missions. The system was developed from the earlier Rhino ferry. The Mexeflote is named after the Military Engineering Experimental Establishment (MEXE) in the UK where it was designed,[1] in conjunction with the neologism "flote" instead of "float".
Key Information
History
[edit]The Mexeflote was introduced to the UK military in the 1960s,[2] and it subsequently saw service in the Falklands War, in which three units were used,[3] including in Southampton, where they were used in loading the Royal Fleet Auxiliary and Royal Navy ships going to the Falklands.[4] Mexeflotes were used as causeways between ships in the open ocean, stores were driven between ships over a Mexeflote causeway with Fiat Allis forklifts.[5] Sergeant Boultby of 17 Port Regiment, RCT was awarded the Military Medal for using his Mexeflote to rescue survivors at Bluff Cove.[6]
In February 1983 a Mexeflote was used to move a Short Sandringham flying boat from Lee-on-Solent to Southampton docks from where it would then be moved to Southampton Hall of Aviation which was then under construction.[7]
In 1994, the British Army ordered an additional 50 units, and in 2000 they upgraded 60 of the rafts.[2] The Mexeflote was used during the 2010 Haiti earthquake, to transport supplies to the remote Haitian village of Anse-à-Veau from RFA Largs Bay.[8]
The rafts are crewed by the Royal Logistic Corps and they are largely used by the Royal Fleet Auxiliary's Bay-class landing ships.[3] As part of the Royal Australian Navy's acquisition of the Bay-class ship RFA Largs Bay (renamed HMAS Choules for Australian service), two Mexeflotes were also acquired.[9]
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A Mexeflote suspended from the starboard flank of HMAS Choules -
RFA Lyme Bay with a Mexeflote on its port side -
Mexeflote transporting disaster relief teams ashore from RFA Lyme Bay -
Royal Logistics Corps Mexeflote arrives in Anguilla -
Mexeflote unloading on the beach at Grand Turk with heavy plant for use in the rebuild after the hurricane
Design
[edit]Mexeflote is a powered raft (two diesel engines), used to move goods and vehicles between ship and shore when a pier is not available.[10] The Mexeflote is designed in three sizes;
| Type | Length | Width | Capacity | Ref |
|---|---|---|---|---|
| Standard size | 20.12 m (66 ft 0 in) | 7.32 m (24 ft 0 in) | 60,000 kg (130,000 lb) | [11] |
| Larger versions (Maxi-Mexeflote)[2] | 38.41 m (126 ft 0 in) | 7.32 m (24 ft 0 in) | 120,000 kg (260,000 lb) | [11] |
| 38.41 m (126 ft 0 in) | 12.2 m (40 ft 0 in) | 180,000 kg (400,000 lb) | [11] |
Each version has three components; bow, stern, and centre, which can be fitted together as required, making the Mexeflote a versatile craft.[10][12] The different sections allow it to be used as a raft, a floating pontoon, or as a causeway from ship to shore.[2]
Mexeflote was the basis for the design of the Modular Elevated Causeway.[13]
References
[edit]- ^ Thinkdefence: Replacing the Mexeflote
- ^ a b c d "Tactical floating bridges and ferries", Jane's Military Vehicles and Logistics, Jane's, 27 April 2009, retrieved 18 May 2010
- ^ a b "The Landing Ships and Landing Craft". www.britains-smallwars.com. Archived from the original on 11 December 2009. Retrieved 24 March 2010.
- ^ Puddefoot, Geoff; Barton, Robin H G (2009). "Appendix 4". The Fourth Force. Seaforth. ISBN 978-1-84832-046-8.
- ^ "Over the Shore Logistics - San Carlos and Beyond - Think Defence".
- ^ "Over the Shore Logistics - San Carlos and Beyond - Think Defence".
- ^ Jones, Alan (1984). "Making of a Museum". Southampton Hall Of Aviation The Aviation Experience. pp. 23–25.
- ^ "RFA Largs Bay delivers aid to isolated Haitian village". www.mod.uk. Retrieved 24 March 2010.
- ^ "HMAS Choules commissioned". News. Royal Australian Navy. Archived from the original on 30 August 2012. Retrieved 21 December 2013.
- ^ a b "Mexeflote Raft". www.army.mod.uk. Archived from the original on 8 April 2009. Retrieved 24 March 2010.
- ^ a b c "Landing Craft and Assault Boats; Mexeflote". www.army.mod.uk. Archived from the original on 27 December 2004. Retrieved 18 May 2010.
- ^ "What is a Mexeflote". www.thinkdefence.co.uk. Retrieved 24 March 2010.
- ^ "Modular Causeway Systems". www.globalsecurity.org. Retrieved 24 March 2010.
Further reading
[edit]
Wikimedia Commons has media related to Mexeflote.
- Operational Testing of the Mexeflote Lashing and Launching System for Pontoon Causeways. - August 1970. Billie R. Karrh; James J. Traffalis; Naval Civil Engineering Lab.
Mexeflote
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Development and History
Origins and Early Development
The Mexeflote system originated from research conducted at the Military Engineering Experimental Establishment (MEXE), a British defence research unit formed in 1946 in Christchurch, Dorset, by merging the Experimental Bridging Establishment, Experimental Demolition Establishment, and Experimental Tunnelling Establishment.[5] MEXE focused on innovative military engineering solutions, building on wartime experiences with pontoon and bridging technologies to address post-World War II needs for efficient over-the-shore logistics in amphibious operations.[5] Conceptual development drew from predecessors such as the U.S. Rhino pontoon ferry, deployed extensively during World War II for rapid assembly into floating causeways, and the British Heavy Ferry, whose design work commenced in 1947 to enable ship-to-shore transfer of heavy tracked vehicles using modular steel sections.[2] Additional influences included commercial systems like the Thos Uniflote pontoon, tested in operational contexts such as Aden. Primary design credit goes to Eric Longbottom at MEXE, who refined these elements into a versatile, self-propelled modular raft system designated as the Harbour and Landing Ship Logistics Pontoon Causeway.[2] The nomenclature "Mexeflote" derives from "MEXE" and "flote," reflecting its core function as a buoyant, interconnectable platform.[3] Early prototypes evolved propulsion mechanisms from the Hotchkiss cone propeller employed in initial Heavy Ferry trials to more advanced Gill water jets driven by Rolls-Royce B80 engines, achieving operational viability by the early 1950s.[2] The system entered British Army service in the early 1960s, with manufacturing rights later assigned to Fairey Engineering Ltd. (subsequently WFEL) in Stockport for production scaling.[2] Initial evaluations emphasized simplicity in assembly—requiring minimal specialized tools—and adaptability for unpowered barge or powered raft configurations, addressing limitations in earlier rigid pontoons exposed during post-war exercises.[5]Introduction to Service and Initial Trials
The Mexeflote system, a modular pontoon raft designed for ship-to-shore logistics, was developed by the Military Engineering Experimental Establishment (MEXE) in Christchurch, Dorset, as a versatile solution for transferring vehicles, equipment, and stores without fixed port infrastructure.[5] Drawing from post-World War II concepts like the U.S. Rhino pontoons and earlier British efforts such as the Heavy Ferry (initiated in 1947), the design emphasized simplicity, with standardized steel pontoon sections that could be assembled into rafts, causeways, or jetties.[2] Engineer Eric Longbottom at MEXE led the effort to create a self-propelled, side-loading platform capable of handling heavy loads in varied sea states.[2] Preceding full production, prototypes underwent testing to refine assembly and propulsion mechanisms. Early iterations built on the Uniflote pontoon system, followed by a Mexeflote prototype incorporating Tirfor winches to raise and lower bow ramps for beaching, addressing challenges in ramp deployment and stability during trials.[5] These initial evaluations, conducted at MEXE facilities, focused on modular interlocking, load-bearing capacity (up to 17 tons per section), and integration with propulsion units like water jets or outboard engines, ensuring reliability for military logistics in austere environments.[3] The name "Mexeflote" derives from MEXE (the developer) and "flote," denoting its function as a floating causeway.[3] The system entered operational service with the British Army in the early 1960s, initially under Royal Engineers units before transitioning to the Royal Corps of Transport in 1965 and later the Royal Logistic Corps.[2][5] Assigned to port and maritime regiments, such as the 17th Port Regiment formed in 1949, Mexeflotes provided critical over-the-shore capability, with each standard raft configuration accommodating up to 120 tons of cargo or multiple vehicles.[5] Subsequent evaluations, including U.S. trials in 1970, validated its adaptability for integration with landing ships, influencing recommendations for flexible amphibious designs despite its unpowered baseline requiring towing or auxiliary propulsion.[2]Design and Technical Specifications
Core Components and Materials
The Mexeflote system utilizes three fundamental pontoon types—bow, center, and stern—which interlock to create modular floating platforms for logistics transfer.[3] These components assemble via rigid connectors inserted into recessed slots on the pontoons' sides and ends, enabling configurations such as rafts, causeways, or jetties.[3] [2] Pontoons measure 2.44 meters in width and 1.45 meters in depth, with the bow section extending 7.9 meters in length, center sections at 6.1 meters, and stern sections at 6 meters.[2] The bow incorporates a forward and aft section linked by an articulator for flexibility, plus a hydraulically operated hinged ramp rated for over 80 tonnes, articulating 457 mm upward and 380 mm downward to manage sea states.[2] [5] Center and stern pontoons feature watertight compartments and bulkheads for buoyancy and structural integrity, while the stern supports propulsion mounting.[2] Construction employs welded high-strength structural steel for frames and cladding, ensuring resilience against marine corrosion and mechanical stress.[3] [2] Refurbishments have incorporated epoxy-based paint systems and non-slip decking to enhance longevity and safety.[2] Box-shaped designs with internal reinforcements allow rapid assembly by small crews, typically in under 45 minutes for basic rafts.[3]Modular Configurations and Capacities
The Mexeflote system utilizes standardized hollow steel pontoon sections—bow, center, and stern—each measuring approximately 2.44 meters in width and 1.45 meters in depth, with lengths of 7.9 meters for bow sections, 6.1 meters for center sections, and 6 meters for stern sections.[2][3] These sections connect rigidly via recessed slots and pins, enabling rapid assembly in water by a small crew, typically into rafts three sections wide for stability.[2][6] Propulsion, provided by two 150-horsepower outboard units mounted on stern sections, allows self-propelled operation at speeds up to 6.5 knots, while unpowered configurations rely on towing.[1][2] Common configurations include powered ferries for ship-to-shore vehicle transfer, with hinged bow ramps enabling roll-on/roll-off beaching up to gradients accommodating 80-tonne loads; causeways formed by linking multiple rafts end-to-end to bridge gaps to shore; unpowered barges for cargo lighterage; and floating piers or helicopter landing platforms.[1][2][3] Larger assemblies support ramp support pontoons or dry dock setups, with overall payloads reaching 198 tonnes for extensive vehicle and equipment transfers in theatre entry operations without fixed port infrastructure.[1] Standard raft variants are summarized below:| Variant | Dimensions (length × width × depth) | Payload Capacity |
|---|---|---|
| Type A | 20.1 m × 7.4 m × 1.45 m | 60 tonnes |
| Type B | 38.4 m × 7.4 m × 1.45 m | 120 tonnes |
| Maxi | 38.4 m × 12.2 m × 1.45 m | 180 tonnes |
Propulsion and Auxiliary Systems
The Mexeflote achieves self-propulsion through two outboard azimuth thrusters mounted on the stern pontoon, which also enable steering via thrust vectoring without a separate rudder. Current configurations feature Hydromaster Series 3 units, each driven by a 150 horsepower (112 kW) Cummins diesel engine, allowing assembled rafts to reach speeds of 6.5 knots.[2][7][1] Prior iterations used 75 horsepower (56 kW) Hydromaster or Dorman diesel engines, with the latter paired to 38-inch (97 cm) diameter, three-bladed propellers of 22-inch (56 cm) pitch.[2][3] These upgrades, including a 2020 contract for Series 3 thrusters valued at £26.7 million, addressed reliability and performance in operational environments lacking shore-based maintenance.[2] Auxiliary systems are minimal and integrated for operational simplicity, including a hydraulic jack system to raise and lower the bow ramp for vehicle access.[3] A demountable shelter houses the six-person crew during transit, offering protection from environmental conditions.[2] Modular adaptations, such as for petroleum, oil, and lubricant (POL) storage or transport, utilize the pontoons' inherent buoyancy and sealing rather than specialized pumps or generators.[3]Operational Deployments
Military Combat Operations
The Mexeflote system was first employed in combat during the Falklands War in 1982, where three units supported British logistics operations under Operation Corporate. Operated by personnel from the Royal Logistic Corps' 17 Port Regiment, the rafts facilitated ship-to-shore transfers at unsecured beaches, such as San Carlos Water, following the amphibious landings on May 21, 1982. In the absence of captured port facilities, Mexeflotes were configured as modular causeways extending from landing ships like the Round Table-class LSLs to the shoreline, enabling the offloading of heavy equipment including vehicles, ammunition, and supplies despite harsh weather and enemy air threats.[1][5] These operations were critical to sustaining the ground advance toward Stanley, with Mexeflotes handling the majority of logistic throughput in the initial phases. Estimates indicate they transported over 80% of vehicles, equipment, and supplies from ship to shore across the campaign, underscoring their role in overcoming the campaign's extended supply lines and limited beachhead capacity. The system's low draft and stability allowed it to operate close to shorelines, bridging gaps up to 100 meters while supporting loads exceeding 150 tonnes in raft configuration.[8][9] No subsequent large-scale combat deployments of Mexeflote units have been documented in major conflicts such as the Gulf Wars, where alternative port facilities and over-the-shore methods were prioritized by coalition forces. Its combat utility has since been demonstrated primarily in training and non-combat scenarios, with the Falklands remaining the benchmark for its wartime application.[1]Humanitarian and Disaster Relief Missions
The Mexeflote system has proven valuable in humanitarian and disaster relief operations by enabling the offloading of supplies and equipment from ships to shorelines lacking functional piers, particularly in regions devastated by tropical storms and hurricanes.[10] Its modular pontoon design allows for rapid assembly into rafts or causeways capable of transporting heavy machinery, vehicles, and personnel across beaches or shallow waters.[2] In response to Tropical Storm Erika, which struck Dominica on August 27, 2015, causing widespread flooding and infrastructure damage, RFA Lyme Bay deployed its Mexeflote starting September 4, 2015, to ferry water, bedding, shelter materials, torches, stretchers, and other aid directly ashore.[11] [12] This operation facilitated the rapid distribution of relief stores without dependence on compromised ports, supporting local recovery efforts.[11] Following Hurricane Irma, a Category 5 storm that battered British Overseas Territories in early September 2017, including Anguilla and Turks and Caicos Islands, Mexeflotes were instrumental in aid delivery. The UK Royal Logistics Corps operated a Mexeflote to transport emergency supplies to Anguilla's shores in the immediate aftermath.[13] Similarly, RFA Mounts Bay utilized its Mexeflote to unload heavy plant equipment and construction materials onto beaches at Grand Turk, aiding reconstruction of water systems and other critical infrastructure damaged by winds exceeding 185 km/h.[14] In July 2018, amid ongoing recovery from Hurricanes Irma and Maria, RFA Mounts Bay's Mexeflote efficiently discharged tractors, diggers, trucks, and all-terrain vehicles laden with building materials at Crocus Bay, Sint Maarten, demonstrating the system's role in multi-nation assistance to hurricane-impacted areas.[15] These deployments underscore the Mexeflote's adaptability in enabling swift, port-independent logistics in disaster zones, often integrating with Royal Fleet Auxiliary vessels and specialist troops.[16]Training Exercises and Recent Uses
In October 2024, British forces participated in Exercise Austere Wolf at Pashaliman Naval Base in southern Albania as part of the broader Operation Chelonia, a NATO-aligned series of activities involving over 1,000 UK troops from 18 regular and reserve units. Soldiers from 17 Port & Maritime Regiment, Royal Logistic Corps (RLC), operated Mexeflote platforms to conduct ship-to-shore transits, rapidly assembling the modular rafts aboard MV Hartland Point to offload heavy vehicles, trucks, and equipment onto an undeveloped beachhead without fixed port infrastructure.[17][18] This exercise simulated contested theatre entry, emphasizing the Mexeflote's role in enabling logistic sustainment for a battlegroup in austere environments, with operations highlighting integration between RLC personnel and allied forces from nations including Albania and the United States.[19] A similar iteration of Exercise Austere Wolf occurred in 2022 in the Eastern Mediterranean, where Royal Marines and RLC teams deployed Mexeflote rafts from afloat platforms to facilitate amphibious landings in Cyprus, marking one of the UK's largest combined joint operations in over a decade and involving approximately 1,200 troops.[20] These drills underscored the system's versatility in forming powered rafts for vehicle transfer and temporary causeways, with post-exercise assessments noting successful handling of rough seas and rapid reconfiguration under simulated combat conditions.[21] In early October 2025, 17 Port & Maritime Regiment RLC conducted ongoing maritime training in the Mediterranean, where Mexeflote crews maintained operational proficiency by deploying heavy plant equipment, such as a JCB 436 excavator, to coastal sites from shipboard assembly points.[22] This focused on trade-specific skills like engine maintenance, raft propulsion via Thrustmaster units, and assembly discipline, reflecting routine sustainment training to ensure readiness for expeditionary logistics in variable sea states.[23] Recent uses have integrated Mexeflote into multinational amphibious maneuvers, such as Anglo-French exercises involving RFA Lyme Bay in 2018, though post-2020 applications have prioritized NATO deterrence postures in the Balkans, with the system's modular design proving effective for heavy-lift transfers in non-permissive access scenarios.[24] Ongoing evaluations by the RLC highlight its continued utility despite age-related maintenance challenges, with training emphasizing interoperability with auxiliary vessels like point-source Ro-Ro ships.[2]Assessment and Future Prospects
Operational Strengths and Limitations
The Mexeflote system's primary operational strength lies in its modular design, which enables rapid assembly into versatile configurations such as causeways, floating piers, barges, lighterage platforms, or helicopter landing sites, facilitating logistics over the shore (LOTS) without reliance on fixed ports.[3][4] Pontoons can be interconnected in water by an eight-person crew in approximately 45 minutes using slot connectors, supporting cargo transfers of up to 198 tonnes of vehicles and equipment per configured raft.[1][3] This adaptability has proven effective in diverse scenarios, including combat sustainment and humanitarian aid, as demonstrated in the 1982 Falklands operation and the 2010 Haiti earthquake response, where it enabled beaching and heavy-lift delivery in austere environments.[2][4] Its shallow draft further enhances beach accessibility, complementing roll-on/roll-off systems like those on Albion-class vessels.[4] Transportability represents another key advantage, with individual pontoons (bow, center, and stern sections measuring 20–26 feet long and 8 feet wide) easily moved by road, rail, air, or sea, allowing deployment from Royal Fleet Auxiliary landing ship docks worldwide.[1][25] Self-propulsion via diesel engines (up to two 75-hp units per raft) permits short-distance maneuvers at speeds of 6.5 knots, sufficient for sheltered transfers.[3][1] However, the system's limited propulsion and sea state tolerance constrain its use to calm or sheltered waters, as it lacks the power for extended voyages or operations in rough conditions, reducing reliability in contested or adverse maritime environments.[4] Load capacities, while adequate for many tasks (e.g., 60 tonnes per trip in standard configurations), are comparatively small versus conventional barges or landing craft, limiting throughput in high-volume contingencies.[25][4] Introduced in the early 1960s, the aging fleet faces ongoing maintenance demands, including a 2020 £26.7 million refurbishment contract, and struggles with modern containerized logistics and safety standards in higher sea states.[2] These factors have prompted evaluations for replacement to address obsolescence and evolving threats.[3][2]Criticisms and Improvement Efforts
The Mexeflote system has faced operational limitations in seaworthiness, with effective use restricted to wave heights of approximately 1.5 meters, beyond which stability and safety are compromised.[5] During the 1982 Falklands Conflict, severe weather risks prompted transport as deck cargo rather than sideloaded positions to avoid detachment, and instances occurred where heavy equipment, such as Haulmatic earthmovers, was lost overboard.[2] Overloading beyond rated capacities—up to 200 tonnes against a standard 100-tonne limit—resulted in submerged pontoons and challenges handling specialized heavy loads like 45-tonne rock crushers, necessitating nighttime operations and ad hoc adjustments.[2] Vulnerability to threats remains a noted concern, as the system's exposed positioning during ship-to-shore transfers leaves personnel and assets susceptible to enemy air attacks, as evidenced by commendations for operators under fire in the Falklands.[5] Compatibility issues with modern logistics persist, including the absence of ISO container corner castings for twistlock securing, which predates widespread containerization and risks cargo slippage in moderate sea states; fuel transfer efficiency has also been suboptimal, relying on beach-discharged podded vehicles.[26] Maintenance challenges arise from inconsistent replacement parts quality, leading to compatibility failures in ancillaries and cells.[5] Improvement efforts have focused on propulsion and sustainment upgrades rather than wholesale redesign. In 1985, a £1.4 million contract introduced 67 Hydromaster 75hp outboard units to enhance maneuverability.[2] The British Army acquired 50 additional units in 1994 and upgraded approximately 60 rafts around 2000, incorporating OD150N propulsion systems.[2] A 2020 seven-year £26.7 million Ministry of Defence contract with EP Barrus supported Hydromaster Series 3 engines featuring 150hp Cummins powerplants, alongside workboat integrations for future enhancements. Recent refurbishments by contractors like Landau UK have included epoxy-based anticorrosion coatings, non-slip decking, and hatch replacements to address corrosion and wear from decades of service.[27] Replacement discussions emphasize refurbishment over new procurement, with proposals for additions like bow/stern thrusters or spud wells for stability, contingent on evolving UK amphibious doctrine; no dedicated program has been funded as of 2024, reflecting the system's enduring utility despite age-related constraints.[2]Replacement Programs and Modernization
In recent years, the Mexeflote system has received targeted refurbishments to prolong its operational viability amid its aging infrastructure from the 1960s. In 2023, Landau UK performed comprehensive overhauls on units operated by 52 Squadron, Royal Logistic Corps, at Marchwood Military Port, which involved blasting surfaces to bare metal, repairing structural damage such as rust, dents, and cracks, replacing rusted components with marine-grade stainless steel equivalents, and applying a new epoxy paint system both internally and externally for corrosion resistance.[27] These efforts also included installing durable non-slip decking tested for grip and longevity, restoring the rafts to near-original condition after years of deferred maintenance.[27] Supporting these sustainment activities, the UK Ministry of Defence awarded a £26.7 million contract in 2020 to Barrus Solutions for engine maintenance and related upgrades, enabling continued propulsion reliability across the fleet.[28] Such interventions reflect a strategy of life-extension rather than wholesale renewal, leveraging the Mexeflote's inherently simple, modular steel construction that facilitates repairs without advanced technology dependencies. As of 2024, no dedicated replacement program has been formally initiated or funded by the Ministry of Defence for the Mexeflote, with its longevity tied to evolving UK amphibious doctrines and broader sealift modernization efforts, such as the Strategic Sea Lift – Future (SSL-F) initiative aimed at enhancing overseas deployment capabilities into the 2030s.[29] Defense commentary, including from independent analysts, has advocated for incremental modernizations—such as integrating wireless propulsion controls, advanced navigation aids, azimuth thrusters for maneuverability, spud wells for stability, or ISO twist-lock fittings for container handling—to improve compatibility with prospective Bay-class successors and address limitations in side-loading efficiency.[2] Alternative systems proposed in these discussions include the Canadian Navamar Sea-to-Shore Connector, which supports 81-tonne payloads under a 2018 contract with the Canadian Armed Forces, and the German General Dynamics Pontoon Boot designed for rapid disaster response assembly.[30][31] However, adoption remains speculative, constrained by undefined requirements and fiscal priorities within the UK's Integrated Review refresh and Strategic Defence Review processes, which prioritize versatile multi-role platforms over specialized legacy replacements.[32]References
- https://commons.wikimedia.org/wiki/File:UK_Royal_Logistics_Corps_Mexflote_arrives_in_Anguilla.jpg