Publisher Summary This chapter focuses on the Norwegian domestic communication satellite system. Radio communication for offshore oil rigs has for years been carried out by conventional medium frequency (MP) radiotelephony, usually on a one-channel simplex basis. This has been the method used in the Mexican Gulf and other well-known areas, and it was also the most likely means of communication to and from drilling platforms, barges, and supply vessels in the North Sea. The Norwegian Telecommunications Administration (NTA) started discussions on the possible use of satellites with the North Sea operators early in 1972. The reliability of the INTELSAT system today is beyond question. Many attempts have been made, within and outside Norway, at comparing costs between troposcatter systems and satellite systems in the North Sea. The need for additional drilling production facilities can be expected. The flexibility of the satellite system is of great importance for future development in the North Sea.