HanseYachts AG is the second-largest sailing yacht builder in the world in terms of the number of series-production sailing yachts built per year. The company is among the top ten manufacturers worldwide of motorboats. More than 80% of the yachts built are sold for export. It has one of the most state-of-the-art and diverse ranges of yachts for sale, featuring over 40 different models.

Hanwha Ocean will be at the forefront of building a green energy value chain, combining their existing strengths as a pioneer in energy production facilities and transportation, with Hanwha’s expertise in energy and materials, such as hydrogen, wind power, LNG, and ammonia.

Hapag-Lloyd is one of the leading liner shipping companies. Hapag-Lloyd offers a fleet with a total capacity of 1.7 million TEU, as well as a container stock of approximately 2.8 million TEU including one of the world’s largest and most modern reefer container fleets.

Hapo International Barges B.V. was founded in 1987 by Mr. Henk Poot together with several partners and is situated in the harbour of Rotterdam. The headoffice is located in Rotterdam and with maritime real estate in Rotterdam, Ridderkerk and 's-Gravendeel Hapo is complete. Hapo is specialised in providing pontons, crane barges, heavy machinery and other special equipment for salvaging shipwrecks, off- or onshore operations involving heavy lift.

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.

Harwood Marine places great importance on providing a safe workplace for both employees and visitors to their site. Their many years of success in the industry can be attributed to both the level of quality of design and product they produce, and the total-service solution and experience they provide to the customers.

Hasslö varv is a long-established family business that was started in 1927. And a shipyard where competence has been passed down, while developing and modernising the business. The fourth generation owns and runs the family business.

HAV Shipping AS is a Norwegian limited holding company focusing on Short Sea shipping. HAV Ship Management NoRus AS is established to deliver ship/crew management and support services to the HAV Group and its business partners. HAV Ship Management NorRus' main focus is the sea–river segment. These vessels require efficient and well-organised maintenance due to North Sea voyage conditions, frequent port calls and diversity of bulk/project cargoes.

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.

Built on strong heritage and vast experience, Havfram is a pioneer in installation and early phase development of offshore wind farms.

Hawk Marine specialises in Design, Supply, Installation, Testing, Commissioning and Maintenance of vital and certified fire protection and suppression systems.

Hawthorne Cat is the authorised dealer for Cat construction and power equipment in San Diego, Hawaii, Guam, Saipan and American Samoa. Hawthorne sells, rents, provides parts and service, training and emission solutions to various industries including general building construction, landscaping, marine, paving and power generation.

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.

Heinen & Hopman are experts in the field of designing, engineering and installing heating, ventilation, air conditioning (HVAC) and refrigeration systems on both land and sea. Heinen & Hopman has substantial experience in supplying HVAC solutions for navies around the world. They've delivered dedicated systems for mine countermeasure vessels, support vessels, corvettes, frigates and patrol vessels.

Hellenic Marine LLC, is a full-service ship & offshore repair company based out of Houston, Texas. Their experienced staff of licensed marine engineers, electricians, hydraulic engineers, certified welders, and fitters, has a long-standing history of providing the highest quality service to customers worldwide.

Hellenika LLC. is a Black Sea company specializing in dry docking services, ship repair, and maintenance. With 25 years of experience, they offer onboard ship repair services worldwide, handled by skilled teams of mechanics, welders, electricians, and more. Their comprehensive services include mechanical repairs, steelwork, welding, piping, electrical work, cleaning, painting, and ballast water treatment system installation.

Hellespont Group provides integrated maritime solutions to clients and their assets worldwide. Drawing from experience since 1946 having owned, managed and operated vessels themselves they deliver safe, reliable and efficient ship management services.

HEC provides marine consulting and software development services to shipowners, operators, charterers, shipyards, and government agencies. The primary area of expertise is in the conceptual, preliminary, and contract design of commercial vessels. HEC has extensive experience in new buildings and conversions of containerships, break-bulk carriers, ro-ro’s, and tankers.

Herma Shipyard was established in June 2000 and aspires to be the industry's first choice as a supplier of shipyard services for the Philippines and neighboring areas. They offer complete and integrated shipyard services in a fully-equipped industrial complex, complemented by a highly skilled and experienced technical work force.

Hewes Marine Company has been manufacturing aluminum fishing boats in Colville, Washington since 1948. Their expertise and reputation in the aluminum boat market have been proven year after year, and generation after generation.

HF Jensen is a major developer and manufacturer of sensors, specialising in a diverse range of products tailored for harsh environments. Their extensive portfolio, includes high-quality harsh environment sensors, such as differential pressure sensors, displacement sensors, water level sensors, marine sensors, and pressure sensors.

Founded in 1982, HGH Infrared Systems designs, develops, assembles, and sells optronic systems for industrial, civil, defense, and security applications. In 30 years of existence, HGH has established itself as an international reference in terms of innovation in infrared technology, through the development of multiple advanced sensors.

Hibiscus Petroleum Berhad (Hibiscus Petroleum) is Malaysia’s first listed independent oil and gas exploration and production company. Their key activities are focused on monetising producing oilfields and growing the portfolio of development and producing assets in areas of our geographical focus: the United Kingdom, Malaysia and Australia.

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.

Hidramar Shipyards is a service company that belongs to Hidramar Group, located in Las Palmas Port, Gran Canaria. They have been offering services and technical assistance to the Oil & Gas industry and the Naval sector for more than 3 decades.

HIGAKI SHIPBUILDING is building results are not limited to cargo ships and tankers, but also include gas ships and other special ships. In recent years, they have been building vessels that are in line with the times, as Japan's first "coastal LNG carrier" and "LNG fuel coastal cargo ship".

High Tech Marine provide advanced marine security solutions so users can rest easy knowing the boat is protected. They install customised security systems, including HD cameras, alarms, and GPS technology, all accessible from their smartphone or computer.

Highland Marine Services was founded in the year 1987 in Abu Dhabi, UAE. The company was designed to bridge the gap between employers from every part of the world and the candidates looking for opportunities.

Highridge Consulting Services started in 2011 by Mr. Trey Gregory. Highridge specializes in a variety of corrosion services including some of the following, Corrosion Technicians, ECDA Programs, DCVG, ACVG, Close-Interval Surveying, Inspection for Cathodic Protection Projects, Inspection for Reconditioning/ Anomaly Digs, AC mitigation, Interference testing, and Cathodic Protection Installation.