The Sea Launch project is the world's first purely commercial international venture to develop and operate a sea-based space launch system. The main objective of this project is to provide commercial services for launching spacecraft (SC) from a mobile sea-based launch platform. The project assumes that most of the SC will be launched into the geostationary orbit from an equatorial launch site located in the Pacific Ocean near Christmas Island.

The implementation of this project became possible after an international Sea Launch venture was established, and the partners and their subcontractors have completed a large scope of research and development activities including a first demo launch.