Released in 2210, the Vision I engine was the first of its kind, and shrouded in secrecy. Dr. Tomas Haakona, CEO and founder of the Netherlands-based Haakona Technological Foundations megacorporation, was granted an exclusive UN contract after demonstrating the engine's unique ability to generate tremendous power with only a (relatively) small amount of salt water as a starter. While Haakona insisted on a strict blackbox agreement, he did elaborate on its inner workings to a panel of United Nations science and engineering delegates, who came to be satisfied about its safety and reliability. In association with Raytheon, Haakona began producing the engines as self-sufficient, fully sealed, units. Standardized external connectors and outflow piping allowed the engine to be retrofitted into nearly any vessel, provided the rather large shipping container sized engine was able to fit.
Several inquiries from UN member states into the origin of the engine, and an end to the blackbox provisions to the contract, were met with swift denial from the UN in general and Haakona. Supporters of the agreement cited the great leap in human engineering before them, potentially pulling humankind forward hundreds of years in technological development - how it was designed is hardly as important as what it can be used to do. A vocal minority continues to oppose Haakona technology, but are largely viewed as conspiracy theorists.
While it is illegal under UN law to deconstruct or analyze any Haakona engine, a detailed explanation of its design was published by Haakona to satisfy a clause in their contract. The engine operates as a chain amplifier, funneling energy through a series of engines, some bespoke, some pre-existing. Each engine increases power output between 1.01 and 1.3 times its input, though the transfer medium often changes between engines. Several other mechanisms attached to the chain collect stray energy, such as heat, gases, water, and electrons, each feeding back into the chain. In all, 27 separate engines operate in a long, looping channel, crossing at a central point, and expelling energy as electricity via two rear-facing ducts.