Which of the following describes the INMARSAT Satellite system?

The INMARSAT Satellite system is primarily known for its global mobile satellite communications capabilities, and it utilizes multiple satellites in geostationary orbit to provide coverage across different regions of the world. The correct choice describes several key satellites within the INMARSAT network: AOR-E at 15.5 W, AOR-W at 54 W, POR at 178 E, and IOR at 64.5 E. These designations refer to the positions of INMARSAT satellites, which are strategically placed to provide comprehensive coverage over the Atlantic, Indian, and Pacific Oceans, as well as other areas.

By having these satellites located at specific geostationary orbital positions, INMARSAT ensures wide coverage for maritime, aviation, and land-based communication services. This strategic placement is crucial for maintaining continuous communication, particularly for users who may be moving across large bodies of water.

Other choices do not correctly represent the INMARSAT system. For example, the reference to three regional satellites covering only the Atlantic is too limited since INMARSAT provides services that encompass a wider geographic area. Similarly, stating that there is only one satellite covering the Pacific region significantly underrepresents the satellite network's capability. Lastly, options