The INMARSAT mini-M system is a:

The INMARSAT mini-M system is indeed a satellite communication system designed specifically for mobile communications, particularly for small craft and users needing marine communications. This system utilizes geostationary satellites to create a global coverage area, making it effective for maritime and other mobile applications. The reference to "spot beams" indicates that the system can concentrate its signal towards specific areas, enhancing coverage and improving communication for vessels that may be transient or located in remote locations.

The mini-M system is therefore geared toward providing reliable voice and data services over the open sea, satisfying the needs of users on small vessels, such as fishing boats or recreational craft, which often operate in areas lacking traditional communication infrastructures. This distinct focus on small craft and mobile platforms is a key feature separating it from other communication systems, such as ground-based networks or terrestrial radio systems, which do not offer satellite-based global reach.