Tag Archives: Navantia

Isaac Peral

Navantia has finalized, in the Cartagena facilities, the closure of the resistant hull of the S-81 «Isaac Peral» submarine for the Spanish Navy, after the union of the last section of the ship.

Navantia closes the resistant hull of S81 «Isaac Peral» submarine

The event has been attended by the General Director of Programs from the Ministry of Defence (MoD), General Salvador Álvarez Pascual; the Chief of the Cartagena Arsenal, Vice Admiral Aniceto Rosique Nieto; the Director of Engineering and Construction, Vice Admiral Manuel Martínez Ruiz; the Chief of the Logistics Division, Admiral Gonzalo Sanz Alisedo; the Head of the Naval Systems Department of the Directorate General of Armaments and Material (DGAM), Nicolás Lapique Martín, and the Head of the S-80 Program, Javier del Corral. On behalf of NAVANTIA, the Director of Operations and Business, Gonzalo Mateo Guerrero-Alcázar; the Director of the Shipyard and S-80 submarines Program, Agustín Álvarez Blanco; the Director of Navantia Sistemas, Vicente Santamaría Calvario, and the head of the S-80 Program Office, Ignacio Núñez.

The event began with a brief tour of the submarine, where the progress of the construction of both the S-81 and S-82 submarines was shown. Next, a brief presentation of the submarine’s construction process was made, after which the Director of the Shipyard of Cartagena and the General Director of Programs from the MoD have given a speech, highlighting the importance of this event and the S-80 submarines program.

The closure of the resistant hull is a crucial milestone in the construction of a submarine, as it appears as a complete vessel. Previously, the loading of all the main modules has been carried out, as well as a very high level of completion of the sections. The next step is the completion of the fitting works and the beginning of the testing stage.

This step represents a change of phase. The work in the submarine is now focused on its launching, following a formal and regulated process, based on overcoming safety milestones. This process begins with the tensioning, when the submarine begins to receive electric current; then the battery boarding, to gain autonomy in power generation, and finally the floating and the sea trials.

The scheduled date for floating is October 2020.

 

MAIN FEATURES

Length 80.81 m/265.1 feet
Total Sleeve 11.68 m/38.3 feet
Total Strut 13.69 m/44.9 feet
Diameter 7.30 m/23.9 feet
Surface displacement/immersion 2,695/2,965 t
Accommodation 32 provision + 8 special forces
Conventional submarine of high autonomy equipped with anaerobic propulsion
Extremely low acoustic signature
Excellent maneuverability at low speed
Systems with high automation
Next generation combat system
Air Independent Propulsion system (AIP) – State of the art
High complexity integrated design

 

Radar technology

Lockheed Martin recently signed a contract with Navantia to equip five new F-110 multimission frigates and their land-based test site (Centro de Integración de Sistemas en Tierra or CIST) – with Lockheed Martin’s first naval installation of its solid-state S-band radar. The new F-110 frigates will be built by Spain’s national shipbuilder, Navantia.

Spain builds on its 20-year partnership with Lockheed Martin with the selection of SPY-7, the company’s latest radar technology and combat system for the new F-110 frigates

Recently designated by the U.S. Government as AN/SPY-7(V)1, this technology is derived from current radar programs and significant Lockheed Martin investment. Variants of the SPY-7 radar will also be utilized on programs with Japan’s Aegis Ashore, the Royal Canadian Navy for the Canadian Surface Combatant program and the U.S. Government.

 

Why Does It Matter?

Providing Spain’s homeland with a defense for evolving threats, the F-110 program will further protect the country and its citizens. Equipped with the latest digital, solid-state radar technology, this crucial program:

  • Ensures Spain’s warfighters have the most capable combat system to perform new missions;
  • Strengthens Spain’s economy through industrial participation;
  • Advances Spain’s competitiveness in the global market by providing an opportunity for joint technology development;
  • Paves the way for interoperability with navies across the world, thanks to Aegis’ open architecture.

 

What’s the Technology?

The F-110 will host the first-ever naval solid-state S-band radar for the Spanish Navy. To foster the growth of Spain’s defense and technology industries, Lockheed Martin and Spanish company, Indra, will jointly provide the radar. It will go to sea as part of the Aegis Weapon System, which will be integrated with the ship’s combat management system SCOMBA, when the first frigate deploys in 2026.

The Aegis Weapon System is the most deployed combat system in the world, and its flexible system enables it to fulfill a variety of missions. Due in part to its unique open architecture design, the Aegis family continues to grow internationally as more nations around the world partner with Lockheed Martin.

 

What’s the History?

Lockheed Martin and its Spanish partners have over 20 years of experience in development, production and integration of tactical naval radar systems. Spain’s defense industry growth and expansion of their maritime defense portfolio is a mission Lockheed Martin continues to support.

In the exciting future that lies ahead, Lockheed Martin will continue to work with Spanish industry to explore new areas of industrial cooperation in radar and combat system technologies. This will help pave the way for future international sales of the F-110 frigate and new technologies, including the new S-band radar.

F-110 Frigates

The Council of Ministers has approved an agreement for the execution of the order for the construction of five F-110 frigates, for an estimated value of 4,317 million euros.

A general arrangement drawing of the sensors and weapons of the Spanish Navy’s future F-110 class of frigates (Navantia infographic)
A general arrangement drawing of the sensors and weapons of the Spanish Navy’s future F-110 class of frigates (Navantia infographic)

The object of the authorized execution order is the acquisition by the Ministry of Defense of five F-110 frigates built by the Navantia company.

At present, the Navy has two types of frigates: five of the «Álvaro de Bazán» class (F-100) and six of the «Santa María» class (FFG or F-80). The FFG frigates entered service from 1986, and all of them are in their last third of life. In 2021, they begin to their 35th year of service, so to maintain their current capabilities it will be necessary to replace them with the F-110 frigates.

The proposed program covers the need to replace the current F-80 frigates which are at the end of their operational life, so that the current capabilities of the Navy can be maintained and also cover future needs that could be derived from new operational scenarios, in which new threats and new missions are included.

This acquisition is of great economic, industrial and social relevance for the entire national industry, given the complexity of the design, the integration of its advanced systems and the construction of the platforms themselves.

The F-110 program includes the following main objectives:

  • Construction of five frigates, including the corresponding accoutrements (life jackets, interior safety equipment, mooring ropes, etc.) and first installation parts of each vessel needed to ensure safe navigation without external support.
  • Obtaining Integrated Logistic Support for the F-110 class, which entails the logistic information of the ship, the obtaining of logistic documentation (Maintenance Plan, Procurement Plan and Training Plan, technical manuals, maintenance documentation, support documentation to provisioning), as well as the necessary systems for the implementation of the Digital Model and Twin.
  • Industrial training, operation and maintenance for the personnel of the Ministry of Defense involved in the construction of ships and equipment.

The authorized enforcement order comes from the current agreement between the Ministry of Defense and Navantia, and the payment schedule begins in 2019, ending in 2032. The delivery of the first unit is scheduled for the year 2026, and the last for the year 2031.

The future F-110 frigates will be 145 meters/475.7 feet long, have a beam of 18 meters/59 feet, will displace 5,900 tonnes and have a crew of 145 people.

Their unit cost is €740 million.

Spanish submarine

Navantia, the Spanish shipyard, in its bid for the Walrus Replacement Program is proposing an adaptation to Dutch requirements and local content of the Spanish Navy S80 Plus submarine. With a modern design and a similar size to Walrus-class of about 3,000 tons, the reference design is already fully compliant with Dutch requirements including growth potential.

Navantia proposes an advanced solution for The Netherlands submarine program
Navantia proposes an advanced solution for The Netherlands submarine program

The expeditionary S-80 design is fully funded and already in production, therefore the minimal technical, schedule and financial risks provide an advantage comparing with completely new solutions. The modern design and the new yard infrastructure with a highly automated construction will lead to a solution offering substantial savings respect to any competing offer.

Navantia’s proposal is the only one offering its parent Navy solution, providing the possibility of a common fleet of eight expeditionary submarines offers sharing resources and co-operation in the fields of training, logistics support and operations, a unique joint capability within NATO. Past co-operation between the two countries with the Auxiliary Oiler Replenishment and Landing Platform Dock programs has proven to be very successful.

Navantia, through the S80 program, already has strong relationships with many Dutch naval suppliers and Dutch naval knowledge partners and during the biding process has identified numerous additional parties that will be included in the final solution. There is a clear commitment to work with Dutch naval industry and technology base to ensure full involvement and retention of Dutch submarine capabilities for the entire life cycle of the submarines.

Navantia has no exclusive teaming relations and can therefore consider sharing the construction with Damen at a later stage.

Including the evolved S-80 on the shortlist offers the best and most cost-effective solution, as well as being the benchmark for all new designs.

Spanish Furor

Navantia on Monday, January 21 handed over the Furor (P-46) Buque de Acción Marítima (maritime action ship) to the Spanish Navy at the Ferrol Shipyard. It is the sixth ship of this class built by the company.

Navantia Delivers BAM Furor (P-46) to the Spanish Navy
Navantia Delivers BAM Furor (P-46) to the Spanish Navy

The event was chaired by the Minister of Defense, Margarita Robles, and by the President of the Galicia regional government, Alberto Núñez Feijoo, who were hosted by the president of Navantia, Susana de Sarriá.

The Minister of Defense, Margarita Robles, announced that the implementation order to build the new F-110 frigates that Navantia will build in the shipyards of the Ferrol estuary may be ready in the month of April. The Council of Ministers in December approved an investment plan that will enable the construction, over a period of ten years, of five frigates with a budget of 4,325 million euros.

«This will allow a major modernization of the Navy», said the minister, who highlighted that the advanced technology means the Navy’s future ships will «almost look like space vessels».

Robles estimated that the investment of more than 4,000 million euros will generate 8,000 jobs «with high qualification and projection over time», and added that that the project represents «an important investment in innovation and technology».

 

Versatility and high performance

The BAM-class ships are modern, advanced technology vessels of moderate size, providing high performance, great versatility in terms of missions, and a high level of interaction with other Navy ships, with reduced acquisition and life-cycle costs.

They incorporate all the latest measures in terms of MARPOL regulations on the environment, such as the new propulsion, auxiliary and emergency engines, as well as the TAR plant for wastewater treatment.

Likewise, they have improvements aimed at reducing the weight, new equipment, adaptation for a greater allocation and the application of updated regulations on prevention and operational safety.

Their main missions are:

  • Protection and escort of other vessels;
  • Control of maritime traffic;
  • Control and neutralization of terrorist and piracy actions;
  • Operations against drug and human trafficking;
  • Rescue operations;
  • Support for crisis situations and humanitarian aid;
  • Control of fisheries legislation;
  • Control of environmental legislation and anti-pollution.

Corvette for SA Navy

On January 15, Navantia has initiated, in San Fernando shipyard, the construction of the first corvette for the Saudi Arabia Navy. The event has consisted of the cut of the first plate of the ship, belonging to the block 401, dimensions of 12 × 2,4 meters, a thickness of 7 millimeters and a weight of 1254 kilos.

Navantia initiates the construction of the first corvette for Saudi Arabia
Navantia initiates the construction of the first corvette for Saudi Arabia

The event has been preceded by a presentation of the program by the Program Manager, counting with the attendance of delegations of the navies of Spain and Saudi Arabia, headed by the second Chief of Navy, Admiral Jose Luis Urcelay and Rear-admiral Fahad Ali Alfuraidan, respectively.

The CEO of Navantia, Susana de Sarriá, highlighted that «it is a strategic program for Navantia, that stimulates the economic activity and the employment and positions us internationally as a company that contributes to the Security and Defense. In addition, it places in the shop window a ship of high capacities that can satisfy the needs of other potential clients in this region of the world and other points of interest».

Also, she launched positive message to the workers, emphasizing that «we are going to increase furthermore our already very relevant social contribution as impellers of the creation of quality employment for Cadiz and Spanish industry».

The contract strengthens the immediate future of NAVANTIA, with benefits for all the shipyards of the company and its auxiliary industry, especially, to the whole Bay of Cadiz. Concretely, a workforce of about seven million hours that, translated into employment, will reach the number of 6000 a year, during the next 5 years, including direct and indirect employees.

The program that now starts, and whose last ship will have to be delivered in 2022, includes, besides the construction, the life cycle support for five years, from the delivery of the first ship, with option to other five additional years. The design of these last generation corvettes maximizes simultaneously Navantia’s participation by means of the incorporation of own products, as the CATIZ combat system, the HERMESYS integrated communications system, the DORNA fire control system, the control platform systems, the MINERVA integrated bridge and engines and reducing boxes.

On the other hand, the contract also includes the supply of several services such as, logistic integrated support, operational and maintenance training, supply of training centers for the combat and control of platform systems, life cycle support, and the systems for the maintenance of the ships in the Naval Base.

Supply for the RAN

Navantia has launched today the first AOR (Auxiliary Oiler Replenishment) «Nuship Supply» of a series of two, for the Royal Australian Navy, according to contract signed in May 2016.

Navantia launches Nuship Supply for the Royal Australian Navy
Navantia launches Nuship Supply for the Royal Australian Navy

The ceremony was held at the Ferrol facilities at 4:15 pm coinciding with the high tide, and has counted with the attendance of Mrs. Jenny Barrett, as the godmother of the ship, the president of Navantia, Susana de Sarriá, the Ambassador of Australia to Spain, Julie-Ann Guivarra, and the Royal Australian Navy Chief of Navy, VA MJ Noonan.

The president of Navantia was grateful to the Australian Navy for the confidence deposited in the Company that once again has demonstrated the aptitude to design and build the products and services for the most competitive markets, in time and quality. She added that launching a new ship, means that Navantia shows, once again, an enormous potential and with the upcoming Strategic Plan and the F110 frigates, will guarantee supporting these capacities in the future.

The two ships are based on the Spanish Navy ship «Cantabria» which will be tailored to fulfil specific Australian standards and requirements. The agreement with the Commonwealth of Australia also includes the sustainment of the two AOR ships for a period of five years.

This contract means a workforce of 3 million hours for this area, as well as 35,000 hours for the Cartagena shipyard derived from the engines, and 35,000 for Navantia Sistemas derived from the IPMS. That makes a total of 1,800 jobs until 2020.

Besides, this contract includes a significant amount of participation from Australian industry, with companies such as Raytheon as supplier of the Communication System, Saab Australia as supplier of the Combat System, Scientific Management Associates (SMA) as suppliers of engineering services and Baker and Provan as supplier of cranes. In relation to Support, all the sustainment activities will be performed in Australia (NSW and WA) with Navantia Australia and its subcontractors, which has been partnering with Australian companies since 2007.

AVANTE 2200 corvette

Riyadh: Saudi Arabian Military industries announced the signature of A JV agreement for the design and construction of five (5) AVANTE 2200 corvettes with Navantia. The program will start this autumn and the last unit to be delivered by 2022.

The scope of work includes the installation and integration of the combat systems on the last ship of the JV, the logistics support, training programs and simulators required for the ships’ maintenance as well as the ground testing bases
The scope of work includes the installation and integration of the combat systems on the last ship of the JV, the logistics support, training programs and simulators required for the ships’ maintenance as well as the ground testing bases

In line with the contract, Navantia and Saudi Arabian Military Industries (SAMI) have agreed on the establishment of a Joint Venture (JV) in Saudi Arabia, which will provide an exceptional opportunity to consolidate the position of the integrated systems and technologically advanced solutions provided by Navantia in the Saudi market and area of influence, perfectly aligned with the Kingdom of Saudi Arabia’s Vision 2030 by localizing 50% of the total military spending by 2030.

The contract will generate 6,000 direct and indirect jobs for five years, as follows: 1,100 direct jobs, more than 1,800 from the auxiliary industry, and more than 3,000 indirect jobs generated by other suppliers.

In this respect, the JV will focus on program management and combat system integration and ‎installation, system engineering, system architecture, hardware design, software ‎development, testing and verification, prototyping, simulation, modelling, and through-life support.

H.E. Ahmed Al-Khateeb, Chairman of Saudi Arabian Military Industries, said: «SAMI remains committed to being a key enabler of the Saudi Vision 2030, and the establishment of this Joint Venture with Navantia will localize more than 60% of ships combat systems works including, installation, and integration, which contribute in Kingdoms objective to be at the forefront of shaping the local military industries ecosystem. We will continue to explore collaborations and leverage partnerships that meet our key mandate to localize more than half of the Kingdom’s total military spending».

Mr. Esteban Garcia Vilasánchez, Chairman of Navantia, said: «Navantia is very happy with the signature of this contract that means a starting point for the collaboration with Saudi Arabia. Navantia is committed to contributing to Saudi Vision 2030 and will support the country in this endeavour. The Joint Venture between SAMI and Navantia is an opportunity to develop capabilities in the country and jointly explore future opportunities».

For the AVANTE 2200 contract, the JV will be responsible, among others, of supplying the Combat System of all five ships. Corvettes 4th and 5th will be finalised and deliver in the Kingdom of Saudi Arabia, where the JV will do the installation, integration and test of the complete Combat System.

The JV will contribute to raising the RSNF capabilities to encounter potential threats, maintaining the readiness of the Royal Saudi Naval Forces fleets. In addition, the agreement will create approximately 1,000 jobs and training opportunities for Saudi engineers in the Kingdom and augment the participation of Saudi youth in the industry, contributing towards the objectives of the Kingdom’s comprehensive Vision 2030 plan.

 

Complete and Integral Scope of Supply

In reference to the AVANTE 2200 design, the corvettes have been adapted to the Royal Saudi Naval Forces requirements, providing high-end performances, including excellent seaworthiness, high survivability, as well as the capability to operate in the extreme temperatures of the region, all within an optimized lifecycle cost.

The innovative design maximizes Navantia’s participation in the program by means of incorporating its own products such as the CATIZ combat management system, HERMESYS integrated communications system, DORNA gun fire-control system, Integrated Platform Management System, MINERVA integrated bridge, as well as the engines and reduction gears.

Finally, yet importantly, the contract includes other services into the scope of supply as integrated logistics support, operational and maintenance training, delivery of a training centre for the ships’ combat management system and Integrated Platform Management System, through-life support, and the combat systems maintenance program.

 

Missions

The AVANTE 2200 corvette is a multirole vessel designed specifically for surveillance and maritime control, search and rescue, providing assistance to other vessels and other missions. Furthermore, the vessels will have an impressive capability to protect strategic assets, intelligence gathering, as well as anti-submarine, anti-air, anti-surface and electronic warfare.

Proposal for CSC

Navantia team has announced the submission of its proposal for the Canadian Surface Combatant (CSC) program.

Navantia team submits proposal for CSC
Navantia team submits proposal for CSC

«We are pleased to announce that Navantia-led team has submitted its tender response for the Canadian Surface Combatant program, with Saab Australia as the Combat Systems Integrator (CSI) and CEA Technologies providing key elements of the proposed solution. With a strong heritage in designing and building frigates and destroyers and proven technology transfer in global programs, the Navantia team offers a compliant solution with the best capability for the Royal Canadian Navy and the Canadian shipbuilding industry», said Navantia Chairman Esteban García Vilasánchez.

The team’s proposal is focused on delivering an operationally proven design and leveraging the capabilities key Canadian companies to deliver a ship that is ideally suited to Canada’s requirement. A solution based on the proven F-105 frigate design for the Spanish Navy has been proposed. Navantia has a proud history of delivering for partner navies around the world variants of this design that are currently in service for Norwegian Navy and, most recently, the destroyer HMAS Hobart to the Royal Australian Navy (RAN).

This modern Anti-Submarine Warfare ship will incorporate Saab’s globally recognised 9LV Combat Management Systems (CMS), elements of which are in service on over 240 platforms in 16 navies across the globe, including Canada’s own Halifax class frigates. Demonstrating the proven capabilities Saab Australia and the 9LVCMS it was recently mandated by the Australian Government for use on all major surface combatants of the Royal Australian Navy.

«Our expertise in developing high quality solutions for Australian programs in partnership with CEA Technologies, Navantia and others allows us to provide a low-risk, high capability solution for Canada, which will be fully interoperable with partner navies. The confidence of the Australian Government in mandating Saab combat systems and tactical interfaces across the whole RAN fleet demonstrates the strength of our capability and we look forward to continuing to work with the Royal Australian and Royal Canadian Navies to continue to develop our world-leading systems».

The submission of the CSC bid is also a significant moment for CEA Technologies, providing further opportunities for global partnership, and recognition of the radar expertise the company has built.

«We are excited about the opportunity to collaborate with Canada in the CSC program», said CEA Technologies CEO Merv Davis.

«We can deliver a mature radar which is outperforming the expectations of the Royal Australian Navy and has substantial potential for future growth. Building partnerships through international programs such as CSC is an opportunity for CEA to continue to demonstrate the performance of our innovative solutions. We are proud to be able to provide our Australian technologies to our international partners and allies».

«Other key suppliers engaged by Saab to support the CSC program include Lockheed Martin (Moorestown, New Jersey), General Dynamic Mission Systems – Canada (GDMS-C), DRS Technologies Limited Canada (DRS TCL), OSI Maritime Service and Rheinmetall Canada».

«Our solution will utilise and develop the unique capabilities of over fifty Canadian companies and will create over one thousand long-term, high tech jobs in Canada. Our proposal includes a full technology transfer of Navantia’s design and Saab’s 9LV CMS to Canada to be integrated and maintained by Canadian companies».

«The F-105 is far beyond the conceptual stage of a slowly evolving design process, and is marketed based on proven operational performance as opposed to claims of wishful thinking.  Selection of the Navantia solution will ensure Canada is not burdened with unnecessary cost and risk concerns as CSC transitions from design, to production and ultimately, to a proven operational capability».

«An exciting opportunity, the Navantia team looks forward to having the opportunity to work with Canada in developing and delivering the full capability of the Canadian Surface Combatant to the Royal Canadian Navy».

Under the CSC program, the Royal Canadian Navy will acquire up to 15 frigates to replace the Iroquois Class destroyers and Halifax Class frigates. Construction of the frigates will begin in the early 2020s.

Acceptance of the first
AWD

Minister for Defence Industry, the Hon Christopher Pyne MP, on 16 June 2017 attended a ceremony at the Osborne Naval Shipyard in Adelaide to mark the Government’s provisional acceptance of the first Air Warfare Destroyer (AWD) Hobart.

Defence accepts delivery of first Air Warfare Destroyer Hobart
Defence accepts delivery of first Air Warfare Destroyer Hobart

Minister Pyne said Hobart is the first of three AWD’s being built and integrated by the Air Warfare Destroyer Alliance which comprises the Department of Defence, Raytheon Australia, ASC and support from Navantia.

«The acceptance of this first of class ship is a further demonstration of the success of the Government-led reform initiative, with the program meeting all budget and schedule targets, Hobart will enter into service later this year», Minister Pyne said.

«Hobart will play a critical role for Defence by providing new interoperable capabilities for the Royal Australian Navy. By using a combination of U.S. and Australian technologies, these ships will allow us to work even closer with our allies. Importantly, these ships will provide a safer environment for Australia’s entire Defence Force, as they have the ability to move faster for longer, whilst forming a protective bubble around themselves and other assets in a task force», he said.

Over the last decade, more than 5,000 skilled Australians have constructed all three AWD’s whilst also creating a new combat and support system to meet the unique needs of the Australian Defence Force.

Minister Pyne said provisional acceptance represented some of the most complex and innovative engineering accomplishments ever undertaken in Australia.

«These skills have taken over a decade to build and position Australia well to support the Government’s new Naval Shipbuilding Plan», he said. «The AWD program underscores the importance of Australia’s defence industry as a fundamental input into capability. Rather than just being a supplier for Defence, this program proves how Australian defence industry is truly a strategic partner with Defence».

 

Characteristics

Length 481.3 feet/146.7 m
Beam 61 feet/18.6 m
Draft 23.6 feet/7.2 m
Full load displacement 7,000 tonnes
Main Engine 36 MW/48,276 hp
Top speed 28+ knots/32 mph/52 km/h
Range at 18+ knots/21 mph/33 km/h 5,000+ NM/5,779 miles/9,300 km
Crew 186
Accommodation 234
Combat System Aegis Weapon System Baseline 7.1
AN/SPY-1D(V) Phased Array Radar (81 NM/93 miles/150 km)
AN/SPQ-9B Horizon Search Radar
Mk-41 Vertical Launch System (48 VLS cells: RIM-162 Evolved SeaSparrow Missile (ESSM)/Standard Missile-2 (SM-2)/SM-6)
Mk-45 Mod.4 5” (127-mm) 62 Calibre Gun (Range: 20 NM/23 miles/37 km)
Advanced Harpoon Weapon Control (2 × 4 launchers)
Electronic Warfare (EW) Suite
Very Short Range Air and Surface Defence
Nulka Active Missile Decoy system
Integrated Sonar System incorporating a hull mounted and towed array sonar
Communications Suite
Aviation Flightdeck and hangar for one helicopter
Boats Two Rigid Hulled Inflatable Boats (RHIBs)