Marine engineering

Marine engineering is the engineering of boats, ships, submarines, and any other marine vessel. Here it is also taken to include the engineering of other ocean systems and structures – referred to in certain academic and professional circles as "ocean engineering".

Marine engineering applies a number of engineering sciences, including mechanical engineering, electrical engineering, electronic engineering, and computer science, to the development, design, operation and maintenance of watercraft propulsion and ocean systems.^[1] It includes but is not limited to power and propulsion plants, machinery, piping, automation and control systems for marine vehicles of any kind, as well as coastal and offshore structures.

History

Archimedes is traditionally regarded as the first marine engineer, having developed a number of marine engineering systems in antiquity. Modern marine engineering dates back to the beginning of the Industrial Revolution (early 1700s).

In 1807,

Relevance and Scope

There are many ways to become a

(B.Eng. or B.E.),

Bachelor of Science (B.Sc. or B.S.),

Bachelor of Technology (B.Tech.),

Bachelor of Technology Management and Marine Engineering (B.TecMan & MarEng)

Bachelor of Applied Science (B.A.Sc.) in Marine Engineering.

Depending on the country and jurisdiction, to be licensed as a Marine engineer, a

degree;

Master of Engineering (M.Eng.),

Master of Science (M.Sc or M.S.)

Master of Applied Science (M.A.Sc.)

may be required. There are also Marine engineers who have come from other disciplines, e.g., from engineering fields like

program to be qualified as a Marine engineer.

The fundamental subjects of Marine engineering study usually include:

• Numerical Analysis
• Geoscience; Geochemistry, Geophysics, Mineralogy, Geomatics
• Soil Mechanics, Geomechanics
• Mass Transfer
• Hydrogeology
• Fluid Dynamics
• Spatial Analysis, Statistics
• Control Theory, Instrumentation
• Surface Mining; Open-pit mining

Related Fields

Naval architecture

In the engineering of seagoing vessels, naval architecture is concerned with the overall design of the ship and its propulsion through the water, while marine engineering ensures that the ship systems function as per the design.^[3] Although they have distinctive disciplines, naval architects and marine engineers often work side-by-side.

Ocean engineering (and combination with Marine engineering)

The same combination has been applied to the rest of this article.

Oceanography

Oceanography is a scientific field concerned with the acquisition and analysis of data to characterize the ocean. Although separate disciplines, marine engineering and oceanography are closely intertwined: marine engineers often use data gathered by oceanographers to inform their design and research, and oceanographers use tools designed by marine engineers (more specifically, oceanographic engineers) to advance their understanding and exploration of the ocean.^[6]

Mechanical engineering

Marine engineering incorporates many aspects of mechanical engineering. One manifestation of this relationship lies in the design of shipboard propulsion systems. Mechanical engineers design the main

systems are typically designed by their suppliers; the only design responsibility of the marine engineering is installation.

Furthermore, an understanding of mechanical engineering topics such as fluid dynamics, fluid mechanics, linear wave theory, strength of materials, structural mechanics, and structural dynamics is essential to a marine engineer's repertoire of skills. These and other mechanical engineering subjects serve as an integral component of the marine engineering curriculum.^[7]

Civil Engineering

Civil engineering concepts play in an important role in many marine engineering projects such as the design and construction of ocean structures, ocean

, and port/harbor design.

Coastal engineering

Electronics and Robotics

Marine engineering often deals in the fields of electrical engineering and robotics, especially in applications related to employing deep-sea cables and UUVs.

Deep-sea cables

A series of transoceanic

.

UUV autonomy and networks

The use of unmanned underwater vehicles (UUVs) stands to benefit from the use of autonomous algorithms and networking. Marine engineers aim to learn how advancements in autonomy and networking can be used to enhance existing UUV technologies and facilitate the development of more capable underwater vehicles.

Petroleum Engineering

A knowledge of marine engineering proves useful in the field of petroleum engineering, as hydrodynamics and seabed integration serve as key elements in the design and maintenance of offshore oil platforms.

Marine construction

Marine construction is the process of building structures in or adjacent to large bodies of water, usually the sea. These structures can be built for a variety of purposes, including transportation, energy production, and recreation. Marine construction can involve the use of a variety of building materials, predominantly steel and concrete. Some examples of marine structures include ships, offshore platforms, moorings, pipelines, cables, wharves, bridges, tunnels, breakwaters and docks.

Challenges specific to marine engineering

Hydrodynamic loading

In the same way that civil engineers design to accommodate wind loads on building and bridges, marine engineers design to accommodate a ship or submarine struck by waves millions of times over the course of the vessel's life. These load conditions are also found in marine construction and coastal engineering

Stability

Any seagoing vessel has the constant need for hydrostatic stability. A

tanks. Marine engineers are responsible for the task of balancing and tracking the fuel and ballast water of a ship. Floating offshore structures have similar constraints.

Corrosion

The saltwater environment faced by seagoing vessels makes them highly susceptible to corrosion. In every project, marine engineers are concerned with surface protection and preventing galvanic corrosion. Corrosion can be inhibited through cathodic protection by introducing pieces of metal (e.g. zinc) to serve as a "sacrificial anode" in the corrosion reaction. This causes the metal to corrode instead of the ship's hull. Another way to prevent corrosion is by sending a controlled amount of low DC current through the ship's hull, thereby changing the hull's electrical charge and delaying the onset of electro-chemical corrosion. Similar problems are encountered in coastal and offshore structures.

Anti-fouling

is the process of eliminating obstructive organisms from essential components of seawater systems. Depending on the nature and location of marine growth, this process is performed in a number of different ways:

• Marine organisms may grow and attach to the surfaces of the outboard suction inlets used to obtain water for cooling systems. Electro-chlorination involves running high electrical current through sea water, altering the water's chemical composition to create sodium hypochlorite, purging any bio-matter.
• An electrolytic method of anti-fouling involves running electrical current through two anodes (Scardino, 2009).
  aluminum (or alternatively, iron). The first metal, copper anode, releases its ion into the water, creating an environment that is too toxic for bio-matter. The second metal, aluminum, coats the inside of the pipes to prevent corrosion.^{[citation needed}
  ]
• Other forms of marine growth such as mussels and algae may attach themselves to the bottom of a ship's hull. This growth interferes with the smoothness and uniformity of the ship's hull, causing the ship to have a less hydrodynamic shape that causes it to be slower and less fuel-efficient.[9] Marine growth on the hull can be remedied by using special paint that prevents the growth of such organisms.

Pollution control

Sulfur emission

The burning of marine fuels releases harmful pollutants into the atmosphere. Ships burn marine diesel in addition to

This section needs to be updated. Please help update this article to reflect recent events or newly available information. (June 2023)

Oil and water discharge

Water, oil, and other substances collect at the bottom of the ship in what is known as the bilge. Bilge water is pumped overboard, but must pass a pollution threshold test of 15 ppm (parts per million) of oil to be discharged. Water is tested and either discharged if clean or recirculated to a holding tank to be separated before being tested again. The tank it is sent back to, the oily water separator, utilizes gravity to separate the fluids due to their viscosity. Ships over 400 gross tons are required to carry the equipment to separate oil from bilge water. Further, as enforced by MARPOL, all ships over 400 gross tons and all oil tankers over 150 gross tons are required to log all oil transfers in an oil record book (EPA, 2011).[11]

Cavitation

Cavitation is the process of forming an air bubble in a liquid due to the vaporization of that liquid cause by an area of low pressure. This area of low pressure lowers the boiling point of a liquid allowing it to vaporize into a gas. Cavitation can take place in pumps, which can cause damage to the impeller that moves the fluids through the system. Cavitation is also seen in propulsion. Low pressure pockets form on the surface of the propeller blades as its revolutions per minute increase (IIMS, 2015).^[12] Cavitation on the propeller causes a small but violent implosion which could warp the propeller blade. To remedy the issue, more blades allow the same amount of propulsion force but at a lower rate of revolutions. This is crucial for submarines as the propeller needs to keep the vessel relatively quiet to stay hidden. With more propeller blades, the vessel is able to achieve the same amount of propulsion force at lower shaft revolutions.

Applications

The following categories provide a number of focus areas in which marine engineers direct their efforts.

Arctic Engineering

In designing systems that operate in the arctic (especially scientific equipment such as meteorological instrumentation and oceanographic buoys), marine engineers must overcome an array of design challenges. Equipment must be able to operate at extreme temperatures for prolonged periods of time, often with little to no maintenance. This creates the need for exceptionally temperature-resistant materials and durable precision electronic components.^{[citation needed]}

Coastal Design and Restoration

Coastal engineering applies a mixture of civil engineering and other disciplines to create coastal solutions for areas along or near the ocean. In protecting coastlines from wave forces, erosion, and sea level rise, marine engineers must consider whether they will use a "gray" infrastructure solution - such as a breakwater, culvert, or sea wall made from rocks and concrete - or a "green" infrastructure solution that incorporates aquatic plants, mangroves, and/or marsh ecosystems.^[13] It has been found that gray infrastructure costs more to build and maintain, but it may provide better protection against ocean forces in high-energy wave environments.^[14] A green solution is generally less expensive and more well-integrated with local vegetation, but may be susceptible to erosion or damage if executed improperly.^[15] In many cases engineers will select a hybrid approach that combines elements of both gray and green solutions.^[16]

Deep Sea Systems

Life Support

The design of underwater

, and thermodynamics.

Unmanned Underwater Vehicles

Marine engineers may design or make frequent use of unmanned underwater vehicles, which operate underwater without a human aboard. UUVs often perform work in locations which would be otherwise impossible or difficult to access by humans due to a number of environmental factors (e.g. depth, remoteness, and/or temperature). UUVs can be remotely operated by humans, like in the case of remotely operated vehicles, semi-autonomous, or autonomous.

Sensors and instrumentation

The development of

point straight down and can give an accurate reading of ocean depth (or look up at the underside of sea-ice). More advanced echo sounders use a fan-shaped beam or sound, or , or for engineering survey. For close-range underwater communications, optical transmission is possible, mainly using blue lasers. These have a high bandwidth compared with acoustic systems, but the range is usually only a few tens of metres, and ideally at night. As well as acoustic communications and navigation, sensors have been developed to measure ocean parameters such as temperature, salinity, oxygen levels and other properties including nitrate levels, levels of trace chemicals and environmental DNA. The industry trend has been towards smaller, more accurate and more affordable systems so that they can be purchased and used by university departments and small companies as well as large corporations, research organisations and governments. The sensors and instruments are fitted to autonomous and remotely-operated systems as well as ships, and are enabling these systems to take on tasks that hitherto required an expensive human-crewed platform. Manufacture of marine sensors and instruments mainly takes place in Asia, Europe and North America. Products are advertised in specialist journals, and through which help raise awareness of the products.

Environmental Engineering

In every coastal and offshore project, environmental

Offshore Systems

A number of systems designed fully or in part by marine engineers are used offshore - far away from coastlines.

Offshore oil platforms

The design of

to prevent oil leaks and spills from contaminating the ocean.

Offshore wind farms

Offshore wind farms encounter many similar marine engineering challenges to oil platforms. They provide a source of renewable energy with a higher yield than wind farms on land, while encountering less resistance from the general public (see NIMBY).^[18]

Ocean wave energy

Marine engineers continue to investigate the possibility of ocean wave energy as a viable source of power for distributed or grid applications. Many designs have been proposed and numerous prototypes have been built, but the problem of harnessing wave energy in a cost-effective manner remains largely unresolved.^[19]

Port and Harbor Design

A marine engineer may also deal with the planning, creation, expansion, and modification of port and harbor designs. Harbors can be natural or artificial and protect anchored ships from wind, waves, and currents.^[20] Ports can be defined as a city, town, or place where ships are moored, loaded, or unloaded. Ports typically reside within a harbor and are made up of one or more individual terminals that handle a particular cargo including passengers, bulk cargo, or containerized cargo.^[21] Marine engineers plan and design various types of marine terminals and structures found in ports, and they must understand the loads imposed on these structures over the course of their lifetime.

Salvage and Recovery

Marine salvage techniques are continuously modified and improved to recover shipwrecks. Marine engineers use their skills to assist at some stages of this process.

Career

Industry

With a diverse engineering background, marine engineers work in a variety of industry jobs across every field of math, science, technology, and engineering. A few companies such as Oceaneering International and Van Oord specialize in marine engineering, while other companies consult marine engineers for specific projects. Such consulting commonly occurs in the oil industry, with companies such as ExxonMobil and BP hiring marine engineers to manage aspects of their offshore drilling projects.

Military

Marine engineering lends itself to a number of

play a role in certain marine engineering projects as well.

Expected Growth

In 2012, the average annual earnings for marine engineers in the U.S. were $96,140 with average hourly earnings of $46.22.[22] As a field, marine engineering is predicted to grow approximately 12% from 2016 to 2026. Currently, there are about 8,200 naval architects and marine engineers employed, however, this number is expected to increase to 9,200 by 2026 (BLS, 2017).^[23] This is due at least in part to the critical role of the shipping industry on the global market supply chain; 80% of the world's trade by volume is done overseas by close to 50,000 ships, all of which require marine engineers aboard and shoreside (ICS, 2017).^[24] Additionally, offshore energy continues to grow, and a greater need exists for coastal solutions due to sea level rise.

Education

Maritime universities are dedicated to teaching and training students in maritime professions. Marine engineers generally have a bachelor's degree in marine engineering, marine engineering technology, or marine systems engineering. Practical training is valued by employers alongside the bachelor's degree.

Professional institutions

• IMarEST
• Society for Underwater Technology
• IEEE Oceanic Engineering Society
• Marine Engineering and Research Institute
• Indian Maritime University
• Royal Institution of Naval Architects (RINA)
• Society of Naval Architects and Marine Engineers (SNAME) is a worldwide society that is focused on the advancement of the maritime industry. SNAME was founded in 1893.^[25]
• American Society of Naval Engineers (ASNE)
• SIMAC

Degrees in ocean engineering

A number of institutions - including

.

Graduate students in ocean engineering take classes on more advanced, in-depth subjects while conducting research to complete a graduate-level thesis. The

Journals and Conferences

Journals about ocean engineering include Ocean Engineering,[33] the IEEE Journal of Oceanic Engineering^[34] and the Journal of Waterway, Port, Coastal, and Ocean Engineering.^[35]

Conferences in the field of marine engineering include the IEEE Oceanic Engineering Society's OCEANS Conference and Exposition^[36] and the European Wave and Tidal Energy Conference (EWTEC).^[37]

Marine Engineering Achievements

• The Delta Works is a series of 13 projects designed to protect the Netherlands against flooding from the North Sea. The American Society of Civil Engineers named it one of the "Seven Wonders of the Modern World".^[38]
• As of April 2021 twenty-two people have descended to Challenger Deep, the lowest point in the Earth's ocean located in the Mariana Trench.
• Recovery of
  CIA engineers aboard Glomar Explorer.^{[citation needed}
  ]

Notable Marine Engineers

In Industry

• Pieter van Oord,
  CEO of Royal van Oord

In Academia

• Michael E. McCormick, Professor Emeritus of the Department of Naval Architecture and Ocean Engineering at the U.S. Naval Academy and pioneer of wave energy research

In Media and Popular Culture

• Marine engineers performed an important role in the clean-up of oil spills such as
  British Petroleum
  .
• Deepsea Challenge follows the story of the team that built a submersible in which Cameron made the first solo descent to Challenger Deep
  , the lowest point in the Earth's ocean.

See also

• Engine room – Space where the propulsion machinery is installed aboard a ship
• Engineering officer (ship) – Licensed mariner responsible for propulsion plants and support systems
• Marine architecture – Branch of architecture focused on coastal, near-shore and off-shore construction
• Marine electronics – electronics (devices) designed and classed for use in the marine environment on board ships and yachts where impact of salt water may break its normal functioningPages displaying wikidata descriptions as a fallback
• Naval architecture – Engineering discipline dealing with the design and construction of marine vessels
• Oceanography – Study of physical, chemical, and biological processes in the ocean

References