Which command initiates requesting a specific communication during SITOR operations?

The command that initiates requesting a specific communication during SITOR operations is indeed DIRTLX. This command is utilized within the context of the SITOR (Simplex Telex Over Radio) system, which is designed for sending and receiving text messages over radio frequencies.

When a user wishes to request a specific communication, they send a DIRTLX command to signal their intention to engage in a dialogue with another station. This command specifies that the user is ready to receive messages and indicates the type of service they wish to utilize, in this case, a direct text transmission.

Understanding the function of DIRTLX is essential for operators because it supports effective communication and ensures that messages are properly routed and acknowledged in SITOR operations. This command plays a critical role in managing communication requests, thus facilitating orderly exchanges in maritime messaging.