What is required for a Link 16 terminal to actively obtain fine synchronization?

The requirement for a Link 16 terminal to actively obtain fine synchronization is the successful exchange of one Round Trip Timing (RTT) message. RTT messages are essential for calibrating the timing between terminals in a Link 16 network, allowing for precise communication and coordination.

When a terminal sends an RTT message, it measures the time it takes for the message to reach another terminal and return. This round-trip measurement is crucial for determining any discrepancies in timing that may exist between different units in the network. By successfully exchanging an RTT message, the terminal can adjust its timing mechanism to align with the other terminal, enabling fine synchronization of communications.

In contrast, while factors such as packet loss and clock settings do influence the overall performance and reliability of a Link 16 network, they do not specifically guarantee fine synchronization as effectively as the RTT message exchange. Establishing a direct satellite link is unnecessary for fine synchronization, as Link 16 is designed for interoperability across various platforms and environments, including terrestrial and airborne communications.