The S3 system distinguishes itself through its ability to always blend and adjust two fuels to the desired sulphur content as well as documenting sulphur content, enabling monitoring and control of sulphur emissions. The primary market for the S3 Smart Sulphur Switch is for vessels that occasionally need to enter an ECA meaning that the investment in a scrubber solution is not viable. The secondary market is for vessels, for example ferry operators in the Baltic who choose to install scrubbers that cannot handle more than 2% sulphur content due to space considerations.