Bond Marine Consultancy has developed software called BMC-EEXI & CII to calculate the Energy Efficiency Existing Ship Index (EEXI) and Carbon Intensity Indicator (CII) values for ships. Their experts visit ships to collect technical data, use the BMC software to perform the calculations, and prepare documents for classification society approval of the EEXI and annual CII declarations required by regulations taking effect from 2023. The software considers factors like main engine and auxiliary engine parameters, shaft power, and type-specific correction factors to determine a ship's EEXI and annual CII rating.