🔍 Key Concepts

• Inmarsat-C is a data (message) terminal, not a voice system • How SMS (Short Message Service) destinations are usually stored or entered (address book vs. typing into a message body) • Typical steps on an Inmarsat-C SEND/RECEIVE or TRANSMIT menu when sending a message to shore

💭 Think About

• Ask yourself: does reaching a mobile phone require voice capability, or can it be done through a data/SMS gateway? • Think about where destination information is normally entered on Inmarsat-C – is a phone number treated as a special first line in the text, or as an address field (like an email/telex address)? • Consider which option best matches standard message workflow on Inmarsat-C: compose message first, then choose destination, then send.

✅ Before You Answer

• Verify whether Inmarsat-C can send to shore-based SMS numbers via an addressed message • Check how destinations are normally selected on Inmarsat-C (address book/manual entry vs. inside the text body) • Confirm that the use of the SEND/REC or TRANSMIT menu aligns with the normal sequence of message composition and addressing