Triple-E has four rating levels - 4, 3, 2 and 1 (where 1 is the highest). For each of these levels, there are requirements within the areas of management, operation and design. To reach a specific rating level, all the requirements stated for this rating level and the levels below it have to be complied with.

A Triple-E rating is a verification of a ship's actual environmental performance, and each rating demonstrates a different level of environmental competence and pro-activeness for a vessel and company:

A detailed specification of all Triple-E requirements will be provided to clients entering the rating scheme. Triple-E requirements may be amended to emerging regulations.

Rating-level characteristics

Rating 4:

• Heightened environmental performance through a company environmental policy and targets in place
• Verified compliance with all current environmental rules and regulations
• Reliable operation through quality testing of all fuel used.

Rating 3:

• Systemised environmental performance through an implemented Environmental Management System
• Clear energy efficiency targets through an established Ship Energy Efficiency Management Plan (SEEMP) and calculation of an Energy Efficiency Operational Indicator (EEOI)
• An environmental awareness survey completed with training needs and improvement areas identified.

Rating 2:

• Sustained environmental performance and improvements documented through a certified Environmental Management System
• Minimised emissions to air and optimal fuel efficiency through an implemented Ship Energy Efficiency Management Plan (SEEMP) and an Energy Efficiency Operational Indicator (EEOI), monitored over time to document performance
• Verifiable fuel oil measurements and an Inventory of Hazardous Materials (IHM).

Rating 1:

• Leading environmental performance through operational risk assessment and enhanced crew competence levels
• Minimised environmental impact through state-of-the-art ship and equipment design
• A verified Energy Efficiency Design Index (EEDI).