What sequence of ARQ codes is used to request establishment of a landline, end radio link after traffic, and request connection for AMVER messages?

The correct sequence of ARQ codes utilized for establishing a landline, ending a radio link after traffic, and requesting a connection for AMVER messages is accurately represented in the chosen option.

The code DIRTLX is employed to perform the action of establishing a landline, which is crucial for initiating communication. Following that, BRK+ is used to end the radio link after any ongoing traffic has concluded, ensuring that communication is properly terminated and that the frequency can be cleared for other users. Finally, AMV+ is specifically designed to request the connection for AMVER messages, which are essential for maritime safety and vessel tracking.

This sequence is significant because it delineates clear steps in communication protocols, allowing for a structured process in managing the transitions between different forms of communication and furthering maritime safety regulations. Each code in this sequence has a distinct function that contributes to an overall effective communication strategy.