H4 has the resources of several specialist engineers working within mechanical design and engineering to call on, should you require advice in any mechanical system. are often called on to advise on the options available where existing systems have failed or show excessive wear.

The Hadley Shipping Group Ltd operates as one of the few remaining family-controlled British shipping companies. The Company has navigated through often volatile and unpredictable markets with a legacy of prudent and responsible investment to prove credible growth and continued expansion.

Halyard has focused on providing technical equipment and services that make boating more enjoyable. Initially an Aquadrive distributor, their offerings quickly grew to encompass other noise reducing technologies including sound insulation and exhaust systems for all kinds of vessel.

Hamble Marine Ltd is one of the UK’s suppliers of Marine Electronics to the leisure boat owner. They are a major Garmin supplier (FishFinders, ChartPlotters & Transducers etc) and the largest independent importer of Banten antennas (Marine VHF and Boat TV aerials).

Hamble Propellers & Engineering Services Manufacture the best Quality propellers and stern gear using the latest design and casting techniques. Hamble Propellers & Engineering Services use only virgin metal stock to ISO & BS1400 Standards. Propeller Shafts are manufactured in a High Quality Marine Grade 316 Stainless Steel.

The HamiltonJet waterjet is one of the most advanced and innovative marine propulsion systems in use today, and is at the forefront of waterjet propulsion technology. Now we are also consistently delivering vessel autonomy solutions in conjunction with our waterjet technologies.

Hamworthy Pumps is a market-leading manufacturer of in-line pumps for the marine and offshore industries. They operate within the areas of engine room pumps, pump room systems, fire water pump packages, scrubber pumps, as well as sales and after-sales services.

Selling Marine Supplies and Accessories Since 1985 Harbour Chandler is a locally owned and operated business that has had its doors open to the public since 1985. What has made us so successful over the years is our well-stocked shelves, our fair prices and our efforts to find whatever it is that our customers are looking for.

Harbour Clean offers a range of innovative solutions for the provision of shallow water services in all marine environments. tilising a unique fleet of vessels - including amphibious Truxor-type craft, survey vessels, landing craft and utility barges - Harbour Clean ensures total environmental control and management in areas normally considered to be inaccessible to conventional craft.

Hardy Engineering Ltd design, manufacture and supply a comprehensive range of hydraulic and electrical marine equipment. a range of services such as engine servicing/installation, complete hydraulic packages, designing, machining and welding.

Harland & Wolff Established in 1861, Harland & Wolff has 159 years of maritime experience. The experienced Harland & Wolff team is ideally positioned to support the full lifecycle needs of the maritime and offshore industries.

Harold Hayles Limited, .the boat yard situated in the harbour, offers full facilities for all marine services, with all the traditional skills available from our own employees. Run for over 70 years as family businesses on the site of the Sandhouse, we offer the personal friendly welcome of a traditional boat yard.

Harris Interactive is a full-service, digital consultative custom market research agency that combines sector expertise with award-winning research design. We work internationally out of offices in the UK, France, and Germany.

Hartland Shipping Services is an experienced, specialised shipbroking and consulting team with global offices in London, Shanghai and Singapore.

Harwich has attracted trade from across the world. With its deep natural estuary it continues to contribute to the UK’s economic growth. Harwich also ensure the safety of everyone using the harbour. Harwich Pilotage, Vessel Traffic Services and supporting marine services work to keep the Haven flowing night and day.

Haulystic is a pioneer in global e-commerce logistics, leveraging cutting-edge technology and operational expertise to simplify cross-border trade. They offer a comprehensive suite of services, including customs clearance, cross-border logistics, and digital solutions, designed to streamline operations and enhance the customer journey from pre-click to post-click.

Havenstar marina management software is ideal for a whole range of marinas, from small harbors to businesses that manage a whole range of tasks in marinas across several different locations.

Hays Ships owns and operates a small fleet of survey, research, and patrol vessels for a wide variety of clients. With over forty five years of history as a specialist vessel provider, the company has unique experience to offer clients which augments the capabilities of the vessels. Hays Ships vessels are highly targeted to meet client requirements but are typically in the 50 to 100m range with Dynamic Positioning (DP) systems.

HB Hydraulics is a service registered Company providing on-site specialist engineering support to marine and associated land based equipment.

Heatexchangers Southwest was established in 1992 and moved to its present premises in 2006. Heat Exchangers (South West) Ltd. has extensive experience of the heat exchanger industry and its varied applications gained in the UK, US, Europe, Africa and the Middle East. Between them, they have re-tubed and remanufactured virtually every make and model of shell and tube apparatus ever used afloat or ashore.

Heeyas Ltd is a London based, but globally connected sourcing company that specialises in the Oil & Gas and Marine industry. A professional trading company that provides a personalised service to every client. mission is to sustainability source oil rigs and commercial ship equipment’s in an environmentally friendly manner. We achieve this by up-cycling equipment at competitive prices for our clients.

Helmsman Systems Limited is the leading UK designer, manufacturer and supplier of hydraulic steering systems, engine control packages and shaft brakes to an increasingly wide range of inland, coastal, sea going and amphibious craft. The management of Helmsman Systems Limited has been involved in the design and supply of systems to the marine industry for over 15 years, and with its key suppliers has over 50 years of experience.

HENSOLDT UK, formerly Kelvin Hughes Limited, is a globally renowned company in the development, manufacture and supply of maritime navigation and surveillance radar systems. They set the international standard in solid state radar sensor technology with our Kelvin Hughes SharpEye and market renowned navigation and tactical radar display systems.

HFW is a global law firm in the aerospace, commodities, construction, energy, insurance, and shipping sectors.

HiDef carry out and present data from aerial wildlife surveys to ensure sustainable developments, such as wind farms, consider the natural environment, both on land and at sea, providing full environmental consultancy to companies throughout their project.

Hidrostal pump solutions offer outstanding performance for deep-sea fishing and a wide range of applications in the marine and offshore industry. High-quality materials of construction available in the standard range, such as Duplex stainless steel, ensure excellent corrosion resistance even to seawater.

Hill Dickinson LLPare an international commercial law firm with offices in the UK, mainland Europe and Asia. Our people deliver advice and strategic guidance acting as a trusted adviser to businesses, organisations and individuals across the globe and from a wide range of market sectors, advising on non-contentious advisory and transactional work through to all forms of commercial litigation and arbitration.

Hindle Controls are manufacturers of push pull mechanical control cables, tension only cables and suppliers of many brands of pedal systems, KAntrak displays, electronic and manual shifters. Morse Controls has been developing and manufacturing mechanical control systems for on/off-road vehicles and the marine industry since 1933.

Hindle Reman is a division of Hindle Group Ltd. We remanufacture engine components and wear parts for customers in a wide range of industries, including power generation, waste management, oil and gas, construction, rail, marine, defence and many more.

HITEK-nology Solutions Limited (HSL) is an ISO 9001:2015 accredited Facilities Company, that services markets such as the defence (Tri-Service), aerospace, maritime, civil industrial and power markets with specialist application of corrosion control.