Built by Space Systems/Loral (SS/L), the 1300-series hybrid spacecraft, weighing in at 4,642 kg (10,234 lb), carries 24 C-band and 24 Ku-band transponders, to provide a variety of services in the continental United States, Alaska, Hawaii, Mexico and Canada. An industry leader in power, performance and reliability, SS/L’s 1300 model is a space-proven platform that supports a wide range of satellite services and has an excellent record of reliable operation. Its high efficiency solar arrays and lightweight batteries are designed to provide uninterrupted electrical power. While this spacecraft is designed for a 15-year service life on orbit, Sea Launch’s direct insertion into equatorial orbit is expected to yield additional years of fuel life. Galaxy 18 will be positioned at 123 degrees West Longitude.

Space Systems/Loral is a subsidiary of Loral Space & Communications. Based in Palo Alto, California, the company designs and builds satellites and spacecraft systems for commercial and government customers around the world. As the leading provider of high-power commercial satellites, SS/L works closely with satellite operators to deliver spacecraft for a broad range of services including direct-to-home television, digital audio radio, broadband Internet and digital multimedia broadcasting.

Intelsat is the leading provider of fixed satellite services (FSS) worldwide, delivering advanced transmission access for information and entertainment to many of the world’s leading media and network companies, multinational corporations, Internet service providers and governmental agencies. Intelsat also offers seamless service for voice, data and video transmission unmatched in the industry. With the globalization of content, broadband, telecom, HD and IPTV fueling next-generation growth, the ever-expanding universe of satellite services are the cornerstones of today's Intelsat.