How does the ship station confirm successful receipt of characters during SITOR ARQ?

In SITOR ARQ (Selective Inquiry, Twice OR Automatic Repeat reQuest), the process of confirming the successful receipt of characters is particularly important for maintaining effective communication. The correct choice reflects the method by which a ship station acknowledges received data.

During SITOR ARQ, the ship station confirms the successful receipt of characters by waiting for an acknowledgment signal. This mechanism involves sending back a specific acknowledgment character, often referred to as "RQ" (Request for acknowledgment). When the transmitting station sends data, it expects this acknowledgment to ascertain that the receiver has correctly received the transmission. This acknowledgment serves as a verification step, indicating that the communication has been executed without any errors.

This protocol allows for efficient and rapid confirmation since the communication system can sequence and manage the flow of messages based on acknowledgment rather than requiring constant back-and-forth for each character sent. The system is designed to minimize unnecessary retransmissions and increase efficiency during communication.

While other options may incorporate elements of the communication process, they do not accurately describe the most appropriate method for SITOR ARQ. The acknowledgment process in SITOR ARQ relies heavily on waiting for the “RQ” signal, ensuring that the transmission can proceed smoothly based on confirmed receipt rather than merely resending or waiting indefinitely.