While impact is measured through CO2 emission levels, it is not the only criteria. One of the important aspects is that the index takes into account the CO2 per gross ton and guests. The environmental performance of a yacht is not only its gross impact. The impact per passenger transported/distance covered/extent of time required is more significant, whether the yacht is actually used or not.

Efficiency is key

The calculator is available on the website free of charge to give an applicant yacht an idea of its polluting emissions. The official SEA Certificate, issued by Superyacht Eco Association experts for a fee, is much more detailed and accompanied by the SEA flag rating.

The SEA Index is based on the initial IMO EEDI methodology but amended for superyachts. The initial benchmarks were generated from data provided by 130 yachts, ranging from 40-140 meters in size, with every data point of the assessment collected and validated by the SEA.

It is the Association’s expectation that industry players will help to collect the information. From yards and owners to yacht management companies and brokers – and even insurance companies and other equipment or service providers – everyone involved can contribute data, which will remain confidential.

Star rating

Once data is registered, the SEA experts provide calculation results and attribute a star rating of 0 to 5 stars to the applicant yacht. The percentage rating bands are defined to divide the yachts into a rating class, with an equal distance of 25% between the rating bands. The star rating system will evolve with the index over time.