This paper introduces the effects of interference from Adjacent Satellite Systems affecting all applications of Mobile Satellite Communications (MSC) systems as a very important influence of Space constellations. The advantages and disadvantages of those effects are discussed and also are provided particulars about specific local environmental influence in Maritime MSC ( MMSC), such as some of the noise contributions from the local ships >> environment. These noise influences are introduced by atmospheric noise from absorption, industrial noise, out of band emission from ship >> s radar, interference from high power communication transmitters, interference from vehicles and shipyard noise. Specific issues related to blockages caused by vessels superstructures and motion of ship >> s antenna are concluded and a set of solutions are proposed to maximize the availability of satellite communication capacity to the mobile user applications at sea, on the ground and in the air.
