Which INMARSAT service is designed for two-way messaging?

Which INMARSAT service is designed for two-way messaging?

• A. INMARSAT C
• B. INMARSAT A
• C. INMARSAT B
• D. MILSTAR

Answer: (A)

Two-way messaging over satellite relies on a service that can store a message, send it via satellite, and deliver it to the recipient when they connect, even if they’re not online at the moment. INMARSAT-C is built for this purpose. It uses a store-and-forward approach at a very low data rate to handle short text messages and simple data, enabling global two-way messaging where real-time voice isn’t required. The other options are geared more toward real-time voice and higher-speed data: INMARSAT-A provides voice and data services, INMARSAT-B offers higher-speed two-way communications, and MILSTAR is a separate military satellite system not part of INMARSAT.

Two-way messaging over satellite relies on a service that can store a message, send it via satellite, and deliver it to the recipient when they connect, even if they’re not online at the moment. INMARSAT-C is built for this purpose. It uses a store-and-forward approach at a very low data rate to handle short text messages and simple data, enabling global two-way messaging where real-time voice isn’t required. The other options are geared more toward real-time voice and higher-speed data: INMARSAT-A provides voice and data services, INMARSAT-B offers higher-speed two-way communications, and MILSTAR is a separate military satellite system not part of INMARSAT.