🔍 Key Concepts

• Inmarsat-C SES (Ship Earth Station) operation during ongoing communications • How EGC (Enhanced Group Call) / SafetyNET MSI messages are handled in memory and printing • Role of numeric serial numbers for MSI message tracking

💭 Think About

• When an Inmarsat-C terminal is busy with traffic, does it completely ignore EGC MSI messages, or does it handle them in the background somehow? • Think about whether MSI/SafetyNET broadcasts are designed so that an operator might miss a safety message just because they were on another call. • What is the purpose of the serial numbers attached to MSI broadcasts, and how would an operator use them if one message were not received or printed?

✅ Before You Answer

• Check how EGC/SafetyNET messages are stored and displayed in an Inmarsat-C terminal when it is already in use. • Verify what the EGC memory does with MSI messages until the operator can read or print them. • Consider whether message repetition alone is considered sufficient protection against missing vital MSI, or if the system has a more direct handling method.