Target market segments are bulk carriers, tankers and container ships for international shipping which comprise 90% of the marine propulsion market. These sectors must be 30% more efficient by 2025. There are no existing technologies to achieve this. Game-changing Carnot power units will bring the step-change in efficiency required enabling the industry to transition to net zero by 2050. For a 2100-TEU container ship the total cost of ownership savings will be approximately £32 million per unit. Modular Carnot power plants will guarantee continuity of operation, eliminating the need for costly and heavy back-up Auxiliary Power Units.