Synonomous with Stabilisers the Vosper brand has lead the way in Vessel motion control for over 40 years.
With well over 4000 installations worldwide in the leisure, commercial and military markets, VT Marine Products has the largest technical data base and worlds largest stock holding of OEM Vosper stabiliser spares.

Based at our facility in Portsmouth our dedicated spares coordinators are now able to offer a complete service in all aspects of after sales and customer support including:

• Over 7,000 genuine OEM parts available from stock.

• Drop shipments for spares contracts available through courier service.

• Logistics team with over 50 years of experience in Vosper hydraulic systems, with access to our comprehensive archive detailing over 4000 vessel equipment installations.

• Expanding network of service providers & recommended spares distributors.

• Control system upgrades specified including the new Vosper Datum digital control.

• Vospower waterjet sales and spares support.

HM SERIES
The larger Hamilton Jet HM Series of waterjets are an extension of the Company’s range of smaller jet units which have evolved in the ensuing years to represent the latest technological advances in marine propulsion. As boat speeds rise above 25 knots, Hamilton Jet waterjets return higher propulsive coefficients than conventional propellers. They are therefore an ideal choice for high-speed workboats, patrol craft, fast ferries and recreational pleasure cruisers.

Hamilton Jet innovation is the result of on-going research and development utilising its on-site hydrodynamic test rig facility and test boat programmes. Close co-operation is maintained with the local university throughout these programmes. The Hamilton Jet factory is dedicated solely to the production of waterjets. All components are manufactured using the latest CNC machinery, and are produced to the world’s most stringent marine quality standards, including ABS, Lloyds and Det Norske Veritas.

HM Series Power/RPM Inputs

NOTE: Input rpm are subject to suitable cavitation limits. The lower rpm figure is always preferred.
Higher power inputs will restrict the input rpm range.

Amphibious - Fast - Proven

Griffon Hovercraft Limited leads the world in the design, development, manufacture and operation of hovercraft and produces the largest range of amphibious hovercraft available in the world today.

Powered by diesel engines and built to international marine standards, Griffon hovercraft accomplish virtually any task performed by a fast boat but, being amphibious, will go where no boat can venture. Using their unique amphibious capabilities, Griffon hovercraft cruise at speeds of 25-45 knots (29-52mph or 46-83 km/hr) over deep and shallow water, land, mud, sand, ice, weed, debris, swamp, rocks and rapids. They are quiet and economical, using under half the fuel of a boat of the same speed and payload.

The smaller craft in the Griffon range are usually shipped to their overseas destination in containers, whereas the larger craft often travel as on-deck cargo.

Griffon hovercraft are in service throughout the world, from the Arctic to the Tropics. Griffon Hovercraft Limited produces more hovercraft for more applications in more countries than any other manufacturer in the world. 

Military , Paramilitary Applications

Griffon hovercraft will, in advance of taking part in any amphibious assault, also help prepare the Amphibious Operating Area through reconnaissance, the insertion and support of special forces' Advance Force Operations and the guarding/ blocking of maritime choke points on the flanks.

Griffon Hovercraft will move from offshore to the littoral and deep into the hinterland via a riverine network. They will also, over and extended and unsupported period, deploy and recover foot-borne 'recce patrols' and work with sprecial forces' sub-surface and canoe/ RIB patrols.

Griffon hovercraft will lie-up on land - perhaps beneath trees or cliffs - indetected visually and amongst the shore radar clutter, and then 'pounce' on a suspect craft by taking the direct line over the beach, shallow water, mud or sandbanks.

Griffon hovercraft are much more stable weapons platforms than conventional craft, especially whilst manoeuvring. All Griffons can be fitted with protection from ballistic, nuclear, biological and chemical weapons.

Griffon hovercraft will recover evacuees in areas impossible for conventional boats and vehicles to reach. Evacuation is amphibious, fast and effective.

Griffon hovercraft produce virtually no magnetic, acoustic or pressure signature and will operate over sea mines with impunity. Since the craft's air cushion and flexible skirt absorb most of an exploding mine's shock wave, they can be deployed more safely and cost-effectively as mine hunter/ killers than conventional boats.

Griffon hovercraft deliver both troops and equipment rapidly across a beach, reagardless of the state of the tide or the nature of the surface. This enables troops and equipment to disembark safely and drychod not only onto dry land, but even more critically, inland from the exposed watergap.

Hydrographic Survey

Griffon hovercraft have carried out many hydrographic surveys, using several different techniques, along rivers, dams and coasts around the world. These craft can save significant survey time by being unconstrained by tidal consideration -the surveyors often transferrin to land survey techniques as and when required.

Seiemic surveys, mostly for oil and gas companies, have also been carried out by Griffon hovercraft worldwide - again, mostly in tidal or shallow water areas.

Many Griffon hovercraft are used where it is difficult, if not impossible, to rescue people by conventional boats or vehicles, i.e. over swamp, quicksand, flooded areas, mud-flats and thin ice. For instance, the British Royal National Lifeboat Institute currently operates six Griffon hovercraft in areas unreachable by any of its 350 lifeboats.

Tourists travel on Griffon hovercraft simply for the experience. Commuters and shoppers use them just like boats. Authorities and environmentals like them because they produce virtually no wash./ wake at high speed.

Griffon hovercraft are often used on "reconnaissance missions" to survey potential engineering projects. They are then used to transport people and equipment during the subsequent construction, dredging or pipeline-laying phases - often operating from an unprepared beach or a dried-out harbour.

When airports are surronded by difficult terrain, Griffon hovercraft are often the only craft capable of providing rescue services to these areas. Equipped with full firefighting and life-saving equipment, these unique amphibious high-speed craft will deal with virtually any emergency scenario.

Griffon Hovercraft Limited designs and builds unique equipment, based on the air cushion principle, in order to solve many customers' particular problems. Examples include hovering crop-sprayers, hovering cricket-pitch covers, hovering reed-cutters and hover-platforms (barges) capable of carrying payloads up to 125 tonnes.

Advantages

Fully amphibious
Operate over water, land, sandbanks, mudflats, weed, ice, rocks and rapids.

High Speed
Cruise at full payload at speeds of 30-45 knots (35-52mph, 56-83 km/hr)

Low initial costs
Similar prices to conventional boats of the same speed and payload.

Low operating costs
Similar operating costs to conventional boats of the same speed and payload.

Diesel engines
Give reliability, long life and economy.

Negligible noise levels
About the same as trucks or high speed boats.

Highly manoeuvrable
As manoeuvrable as boats.

Simple
Simple in design, manufacture, operation and maintenance.

Relaible
Proven over tens of thousands of operating hours worldwide.

Easy to operate
Takes the same time to learn to operate as learning to drive cars or trucks.

Easy to maintain
Ordinary diesel or boat mechanics can service and maintain the craft.

Minimal training
From one day for the smallest craft to eight weeks for the largest.

Very little spray
Low cushion pressures keep spray to a minimum.

No wash/ wake
There is virtually no wash/ wake at high speed.

Can be classified
Classified by Lloyds, US Coastguard and other classification societies.

No berthing problems
Will operate equally successfully from unprepared beaches and riverbanks as from piers, pontoons and harbours.

Experienced team
The management of Griffon Hovercraft Limited has been involved in the design, development, manufacture and operation of amphibious craft for over 30 years.

The lightweight and easy to apply insulation system
resistant to mechanical impact

•   Minimises risk of under insulation corrosion
•   Provides continous long term thermal efficiency
•   Significant reduction of installation cost

Designed for the on-shore and maritime industries, this black, woven glass fibre covering for Armaflex substrate offers good resistance to UV, mechanical impact and under insulation corrosion, while still remaining flexible in a moving environment. It will not stain or mark. Arma-Chek D is lightweight and its permanent curl characteristics make it quick and easy to install, without using heavy equipment.

Lightweight and easy to apply solution for all areas where protection against mechanical impact is needed

•   Minimises risk of under insulation corrosion
•   Provides continous long term thermal efficiency
•   No risk of galvanic corrosion
•   Low maintenance system
•   Significant reduction of installation cost
•   Easy to install - no special tools required
•   Good resistance to extreme weather, saltwater and damage
•   Highly resistant to UV, oil and chemicals
•   Non metal cladding system
•   Pre-coated tubes and sheets available
•   Complies with internationsl standards

Arma-Chek T is a non-metallic, flexible insulation and covering system developed for the harsh environments of the Oil, Gas and Petrochemical Industries. Arma-Chek T is widely used for onshore and offshore applications. It offers the most reliable solution for irregular shapes and hard to access areas.

The Armaflex substrate is covered with a durable terpolymer paint with an embedded layer of mat glass fibre.

The easy to apply and highly reliable solution for irregular shapes and hard to access areas.

• Significantly minimises the risk of under insulation corrosion
• Provides continuous long term thermal efficiency

• No risk of galvanic corrosion
• Increasing the life expectancy of insulation system
• Considerably reduces the time for monitoring and maintenance
• Significant reduction of installation cost
• Easy application - no need for specialised machinery
• Resistant to salt water (green water wash over)
• Exceptional impact resistance
• Highly resistant to UV, oil and chemicals
• Non metal Cladding system - reduces Health and Safety risks
• Complies with international standards

Cleaner, Quieter Duct Insulation

• Smooth surface - less dirt
• Durable and erosion-resistant
• East to Apply

The competitive advantages if specifying Armaflex Alu

• Lightweight and flexible insulation - also available in self adhesive rolls for easy and speedy installation
• Wide range of sheet thickness available
• Excellent finish with aluminium covering for clean room applications
• The low thermal conductivity, λ 0.035 W/(m.k) at 0°C, and good acoustic performance provide double benefits with one insulation system
• Closed cell structure provides a very efficient built-in vapour barrier with a very high µ value of 12000 (DIN 52615)
• Class O fire category means low fire propagation index, producing minimal contribution to overall heat release, for a high degree of fire protection and safety
• Excellent resistance to the effects of ozone, oil and chemicals
• Does not decay or contribute to the growth of fungus and bacteria
• Easily cleaned with no shedding of particles
• Requires minimal maintenance and assures long term lif of installation
• Dust, fibre, CFC and HCFC free with an ODP of zero

Class O Armaflex is now available with a Class O rated aluminium foil facing for:

• Improved appearance
• Increased structural strength
• Class O fire rating

Should the foil of Armaflex Alu become damaged, the insulation qualities will remain intact, unlike other insulation products, as they depend solely upon a built in vapour barrier within the closed cell structure of armaflex.

The centalink shaft consists of links which are designed for efficienct using flexible bushes for push and pull. In each link there is a cylindrical flexible bush, which is connected radially to the hub and a spheroidal flexible bush which is connected axially to the flange.

This ingenious new desing results in a very simple, highly flexible low cost and easy to assemble link coupling. There are between 3 and 8 links per joint depending on the shaft size.

The rubber joints of the centalink shaft are based on well proven, well dimensioned rubber bushes or spherical joint, where the rubber is vulcanized to the inner and outer metal part and is under high precompression. Such couplings have been well proven in similar application, e.g. couplings for highspeed trains.

All movements of the joints are absorbed flexibly bu the rubber bushes – without relative movement of the metal – and therefore free of wear.

Centalink joints offer the following outstanding advantages

•   Compensation for considerable axial, radial and angular misalignment.
•   With very low reacting forces, and linear characteristics.
•   Constant velocity transmission, angular deflection of the two joints may be   different.
•   Silent operation, transmitted noise reduced. The transmission of noise is   interrupted in four places   by rubber   bushes.
•   Free backlash, torsionally stiff. The single joints are also radially stiff.
•   Free of maintenance, free or wear, with fail-safe-feature.
•   Radially exchangeable without disturbing connected machinery.
•   Easy visual check of the condition of the rubber bushes, easy and fast   exchange of the links is   possible without   special tools.
•   Long shaft distances can be spanned.
•   Combinations with torsionally flexible CENTAX-elements allow optimal tuning   of the torsional   situation.
•   The design is protected by international patent applications.

Important areas of application: Ship main and auxillary drives, between engine and gear and between gear and jet-drive, propeller, generator, hydraulic pump, waterpump etc.

Drive for rail cars between engine and gear or between gear and axle.

Windturbines, cooling towers, fan drives, mills, glazing rollers, steel mills. General construction and machine industry and heavy engineering.

Balancing

The common balancing quality fo U-joint-shafts is Q16 according VDI 2060, if not agreed differently, the CENTALINK-shafts are balanced as follows:

•   flanges, flangehubs and innerpart to quality Q6,3
•   the links to quality Q16.

The links to CENTALINK sizes 48-50-55-60-65-68 and 71 are available in 2 different materials:

•   speroidal cast iron
•   forged aluminium alloy

The links of all other common CENTALINK sizes consists of spheroidal cast iron GGG 50 only.

Depending on the material of the links the following balancing methods are used.

The aluminium links are weighed and brought to the same weight within a close tolerance. Thus they will be a set within the unbalance tolerance. They can therefore be mounted and exchanged as required.

The links of spheroidal cast iron GGG 50 are balanced on relevant fixtures as a set and marked with numbers. Therefore this set always has to stay together and has to be mounted in the same order as numbers indicate.

MDI's Customized Designed

• MDI's customised Design T-foils

• MDI's customised Design Pivoting T-foils

              MDI's Pivoting T-Foil with flaps provide the best Pitch and roll effectiveness with a greater range of operation.proven design with reliable service.

• MDI's customised Design Rectratable T-foils

              MDI's Retractable T-foils with flaps combine the best performance qualities with the safety and convinience of stowing the T-Foil when not required for use wiht the benefit of reduced drag.

• MDI's customised Design Trim Tab

              MDI'S transom mounted trim tabs offer the best roll and pitch control for many vessels and are suitable for most hull types and displacements.

• MDI's customised Design Lifting Foils

              MDI's Active Lifting foil system perform dual functions:

                     Providing Hydrodynamic lift to reduce hull wave making and frictional resistance for higher speed or reduced power,and reducing vessel motion for improved passanger comfort .MDI's ride contraol system electronic coordinate the action of the foils.

• MDI's customised Design Roll Dumping

             The Roll Dumping Stabilizers optimizes the requirements of excellent stabilization performance against minimal cost,weight,power,space requirement and maintenance.

• MDI's Deisigned Digital Controller with Integrated Autopilot

             The MDI digital controller monitors vessel atitude and automatically positions the effectors to reduce accelerations arising from pitch , roll and heave motions. the benefit of the MDI integrated autopilotprovides command to the vessel's steering system to dampen yaw motions and provide heading controll.

Support starts from the moment you make an inquiry to MDI.

The MDI sales team will analyze the vessel parameters and anticipated sea states to ensure that the MDI equipment specified is right for you.

Our dedicated service team is responsible for all of your service and spare parts needs.

MDI has an expanding world-wide network of high-quality technical staff to ensure that your support needs will be efficiently handled.

MDI understands that pre-delivery installation support is critical for shipyards and boat builders, and that system reliability and availability is paramount to operators for safety of crew and passengers.

MDI has spares stocked in Australia, Europe, and the United States to minimize delivery times and keep your system up and running.

If you would like to be contacted by our Service
department, please email us at:info@msc-marines.com