The International Maritime Organization (IMO) continues to advance its environmental and safety agenda for the maritime sector. While many IMO regulations have traditionally focused on commercial shipping, several of the upcoming 2025 amendments will have implications for large yachts and superyachts — especially those engaged in international voyages or commercial charter operations.

This article outlines the most relevant IMO regulatory updates entering into force in 2025 and what they mean for yacht owners, operators, and managers.

1. Mediterranean Sea Emission Control Area (ECA) for Sulfur Oxides (SOx)

As of May 1, 2025, the Mediterranean Sea will officially become a designated Emission Control Area for sulfur oxides (SOx) and particulate matter under MARPOL Annex VI. This follows similar ECAs already in effect in the Baltic Sea, North Sea, and North America.

Key requirements:

• Ships, including yachts, operating in the Mediterranean must use fuel oil with a sulfur content not exceeding 0.10% m/m.

• Alternatively, vessels can use approved exhaust gas cleaning systems (scrubbers) to meet the emissions limits.

Impact on yachts:

• Yachts operating seasonally in the Med will need to ensure compliance with low-sulfur fuel sourcing or install certified abatement technology.

• Charter vessels may face additional scrutiny from port state control during the peak summer season.

2. Ballast Water Management (BWM) Convention Amendments

On February 1, 2025, new amendments to the BWM Convention will come into force, focusing on improved compliance transparency and record-keeping.

Key changes:

• Vessels must maintain updated and standardized ballast water record books.

• Electronic record books will now be explicitly permitted, provided they meet IMO guidelines.

Impact on yachts:

Large yachts with ballast tanks (especially those converted from commercial vessels or over 400 GT) may be subject to inspection and required to demonstrate compliant records.

3. Entry into Force of the Hong Kong Convention on Ship Recycling

On June 26, 2025, the Hong Kong International Convention for the Safe and Environmentally Sound Recycling of Ships will enter into force, following ratification by enough IMO member states.

Requirements include:

• Ships of 500 gross tonnage and above, engaged in international voyages, must carry an Inventory of Hazardous Materials (IHM).

• The IHM must be certified and kept up-to-date throughout the vessel’s operational life.

Impact on yachts:

• Large yachts meeting the GT and operational criteria will need to maintain an IHM.

• This measure supports responsible end-of-life vessel planning and environmental stewardship.

4. Net-Zero Maritime Strategy (Adopted, With Future Entry Dates)

In 2023, the IMO adopted its 2023 Strategy on the Reduction of Greenhouse Gas (GHG) Emissions from Ships, which sets the sector on a path to reach net-zero emissions by or around 2050.

While specific measures (like global fuel standards and emissions pricing) are not entering into force in 2025, the strategy is shaping future regulations that will likely affect:

• Yacht builders using internal combustion engines

• Owners exploring hybrid or alternative fuel propulsion

• Charter operations looking to lower emissions profiles

Yacht stakeholders are advised to monitor future MEPC (Marine Environment Protection Committee) sessions for updates.

5. Continued Focus on Electronic Record-Keeping and Remote Inspections

The IMO and several flag administrations continue to push for wider adoption of electronic documentation and remote audits. While not codified universally, trends include:

• Acceptance of digital logs for drills, hours of rest, and maintenance

• Remote ISM and ISPS audits in lieu of onboard inspections under certain conditions

Impact on yachts:

• Digital preparedness and central record access are becoming expectations, particularly for vessels flagged commercially.

• Operators should consult with their flag state or classification society to ensure alignment.

The regulatory landscape for yachts and superyachts is evolving, and 2025 represents a key milestone in global maritime policy. While many IMO updates are framed around commercial shipping, large private and charter yachts — particularly those over 500 GT — are increasingly within scope.

Owners, captains, and managers are encouraged to:

• Stay informed through flag state circulars and IMO publications

• Engage classification societies for technical guidance

• Plan ahead for compliance-related investments and operational adjustments

By understanding and anticipating these regulatory shifts, the yachting community can remain compliant, environmentally responsible, and future-ready. We’re excited to simplify Yacht Management for everyone, through our software, education, and community.

Team Aquator