The International Maritime Organization (IMO), established in 1958, plays a vital role in shaping the future of international shipping. Headquartered in London, this specialized agency of the United Nations acts as a global regulator, setting international standards for safety, security, and environmental sustainability across the maritime industry. For 2024, the IMO’s focus areas – cost, compliance, and sustainability – promise significant impacts on international ocean transportation. Let’s delve deeper into how these priorities will reshape the sector.
What are the multiple roles of the IMO?
The IMO regulates various aspects of global shipping and related activities. It sets standards for safety, security, environmental protection, and efficiency. Here’s a closer look at its key functions:
- Safety: it develops and adopts international regulations and standards related to ship design, construction, equipment, manning, operations, and disposal to minimize the risk of accidents and pollution. Examples include the SOLAS convention (International Convention for the Safety of Life at Sea), specifically designed for mid-ocean collisions.
- Security: it establishes measures to enhance maritime security and prevent illegal activities at sea, such as piracy and armed robbery.
- Pollution Prevention: it sets regulations to minimize pollution from ships, including air pollution, oil spills, and discharge of waste. This includes regulations on emissions standards and waste disposal practices.
- Liability and Compensation: it develops guidelines for liability and compensation in case of accidents or pollution from ships, ensuring clear frameworks for resolving such situations.
- Maritime Efficiency: it works to improve the energy efficiency of ships, reducing greenhouse gas emissions and promoting sustainable maritime transport.
The IMO handles these tasks through a structured hierarchy. It is composed of three main governing bodies.
- The “Assembly” is the supreme body. Meeting every two years, it sets the overall direction and approves the work program and budget.
- The Council acts as the governing body between Assemblies, overseeing the work of the organization.
- The five permanent committees address specific areas:
- the Maritime Safety Committee (MSC) focuses on the safety of life at sea and pollution prevention.
- the Marine Environment Protection Committee (MEPC) deals with preventing marine pollution from merchant vessels.
- the Legal Committee (LEG) handles legal matters related to international shipping.
- the Technical Cooperation Committee (TCC) provides technical assistance to developing countries in the maritime sector.
- the Facilitation Committee (FAL) streamlines maritime trade by simplifying formalities.
Several sub-committees provide technical expertise and support the work of the main committees.
What are the latest IMO regulations?
To achieve the shipping industry’s carbon-neutral goals, the IMO has implemented a wave of new regulations over the past few years.
GHG emissions monitoring, data collection and reporting (DCS)
To track greenhouse gas (GHG) emissions from ships, the International Maritime Organization (IMO) introduced a mandatory data collection and reporting (MRV) system known as the Data Collection System (DCS). Implemented in 2019, the DCS applies to international voyages of ships exceeding 5,000 gross tonnage (GT). Ship crews are required to collect and record specific data on fuel consumption, cargo carried, and distance traveled during their journeys. These data points are then used by the ship operating companies to compile and submit verified annual emissions reports to their flag administrations (the country of registration). Independent verifiers accredited by the IMO ensure the precision and comprehensiveness of the reported data.
The DCS regulation serves two key purposes. First, it establishes a transparent system for collecting high-quality data, which allows for monitoring progress toward the IMO’s GHG reduction targets. Second, analysis of this information helps to identify areas for improvement in ship design and operational practices, ultimately enabling the development of effective policies and measures to curb emissions from the maritime sector.
Carbon Intensity Indicator (CII)
Leveraging data collected through the DCS regulation, the IMO has implemented the Carbon Intensity Indicator (CII). This rating system measures the ship’s operational efficiency by calculating grams of CO2 emitted per unit of cargo capacity and nautical miles traveled. It applies to international voyages on ships exceeding 5,000 GT.
Ships receive an annual A to E efficiency rating based on their CII value. The CII regulation introduces progressively stricter operational efficiency requirements over time. This incentivizes ship owners and operators to adopt technologies and practices that curb emissions. To achieve the required levels, ships may need to adjust their speed, optimize routes, or investigate alternative fuels.
The CII aims to drive operational improvements and expedite emission reductions across the maritime industry. By rewarding ships with superior efficiency ratings and potentially penalizing those with lower ratings, the IMO encourages a transition toward a more sustainable maritime transportation system.
MARPOL Annex VI: regulations for the prevention of pollution by ships
An international agreement under the IMO’s umbrella, MARPOL Annex VI, regulates air emissions from ships. This annex encompasses a broad spectrum of pollutants, including nitrogen oxides (NOx), sulfur oxides (SOx), particulate matter (PM), and greenhouse gases (GHGs). Recent amendments to MARPOL Annex VI introduce stricter emission limits for various pollutants and establish new requirements:
- The Energy Efficiency Design Index (EEDI) is a mandatory standard that sets design efficiency benchmarks for new ships, promoting the development of more fuel-efficient vessels.
- The Sulphur Emission Control Areas (SECAs) enforce stricter limits on sulfur oxide (SOx) emissions.
- IMO is actively exploring the feasibility of alternative low- and zero-carbon fuels for shipping. This initiative aims to further reduce emissions and lessen reliance on fossil fuels. Promising options include Liquefied Natural Gas (LNG), and biofuels derived from renewable sources like vegetable oils, methanol, green ammonia, and hydrogen.
By continuously revising and updating MARPOL Annex VI, the IMO strives to ensure that the maritime industry operates in a way that minimizes its environmental impact. These regulations play a crucial role in promoting cleaner air and a healthier planet.

Adoption of energy-efficient technologies
Modern commercial ships are increasingly required to adopt a variety of energy-efficient technologies to comply with stricter environmental regulations and reduce operational costs.
- Hull optimization: A special paint-coating hull minimizes the growth of marine organisms, reducing friction and fuel consumption. Additionally, bow thrusters enhance maneuverability, allowing for efficient use of main engines and avoiding needless power demands. Lastly, air lubrication systems employ microbubbles to create a lubricating layer along the hull, minimizing water friction and improving fuel efficiency.
- Propulsion system enhancements: an innovative rudder design called “Wärtsilä’s gate rudder” improves maneuverability and fuel efficiency by optimizing water flows around the propeller. Also, diminishing operational speeds via sow steaming is a simple but effective way to significantly decrease fuel consumption. Moreover, waste heat recovery systems are captured from engines and utilized for other purposes like heating or power generation, improving overall energy efficiency.
- Advanced software helps in various operational matters, such as voyage optimization, by planning the most fuel-efficient routes considering weather conditions and forecasts, currents, and cargo distribution. Some dedicated tool enable optimal propeller immersion and trim of the ship for minimized fuel consumption.
- Energy management systems monitor and analyze shipboard energy consumption, allowing crews to identify areas for improvement and optimize operations. They are combined with sensors that collect data in real time, allowing all concerned parties to make informed decisions.
The specific technologies adopted by a ship will depend on various factors like size, cargo type, and intended voyage routes.
What are the member states responsabilities regarding IMO regulations?
Effective enforcement relies on strong collaboration between the IMO and its 176 member states. Representatives from member states actively participate in IMO meetings and committees. Here, they discuss, develop, and revise international maritime regulations. This ensures the regulations remain pertinent and reflect the latest technological advancements and environmental concerns.
Implementation and enforcement
- Member states play a crucial role by incorporating IMO regulations into their domestic laws. This establishes clear legal frameworks for enforcing the regulations within their territories.
- Each ship is registered with a flag state, the country whose flag it flies. This nation holds primary responsibility for ensuring its registered ships comply with IMO regulations. This includes conducting inspections, issuing safety certificates, and taking enforcement actions against non-compliant vessels.
- Member states can also leverage Port State Control (PSC) to verify compliance of foreign ships entering their ports. In cases of non-compliance identified during such inspections, the port state has the authority to detain the ship until the deficiencies are rectified.
- Member states are responsible for ensuring their seafarers receive adequate training and certification. This empowers them to operate ships safely and in line with IMO regulations.
Developing countries get technical assistance and capacity-building programs from the IMO to implement and enforce IMO regulations.
Cooperation and information sharing
Additionally, the International Maritime Organization (IMO) publishes best management practices (BMP) for mariners operating in high-risk areas. These guidelines cover crew training, voyage planning, and onboard security measures. They include the standards set in the Safety of Life at Sea (SOLAS) Convention, whose overall goal of SOLAS is to minimize the risk of accidents at sea, loss of life, and pollution from ships.
International cooperation
Each member state must designate a national authority responsible for coordinating IMO matters within their country. This authority serves as the main point of contact for the organization and facilitates dialogue, as well as information and knowledge sharing to address emerging challenges and trends.
Besides, they are required to submit regular reports to the IMO on their implementation and enforcement of IMO regulations. This data is critical to evaluate the effectiveness of existing regulations and identify areas for improvement.
By fulfilling their designated roles and fostering open communication, member states ensure consistent application and adherence across the globe. This collaborative approach bolsters IMO’s regulatory framework, fostering a safer, cleaner, and more environmentally friendly maritime industry.
FAQ about IMO regulations and global shipping
The new IMO regulations for 2024 primarily focus on reducing greenhouse gas emissions from ships. This includes stricter limits on sulfur content in fuel, enhanced energy efficiency requirements, and the introduction of carbon intensity indicators.
The regulations will necessitate significant changes in ship operations, fuel usage, and technology adoption. Shipping companies may face increased operational costs due to the need for cleaner fuels and upgraded technologies, but these changes are aimed at reducing the environmental footprint of the maritime industry.
The benefits include a reduction in air pollution and greenhouse gas emissions, improved fuel efficiency, and a lower overall environmental impact on the shipping industry. These changes also promote innovation and the adoption of greener technologies in maritime transport.
While there may be an initial increase in shipping costs due to the transition to cleaner fuels and technologies, these regulations could lead to long-term savings through improved fuel efficiency and reduced environmental penalties. The global trade landscape may also shift, with increased emphasis on sustainable practices.