What is the procedure for moving forward after a train is in Release mode?

In Release mode, the procedure involves continuously monitoring the signals. This is vital because, even though the train is technically in a state where it could move, the operating environment can change rapidly. Monitoring signals helps ensure that the engineer is aware of any indications from signal systems that could affect the train's safety and operational protocols.

While considering the other options, it’s important to note that transitioning to full speed without proper signal monitoring could endanger the train and its passengers. Following manual signals is indeed critical, but it is encompassed under the larger umbrella of signal monitoring; engineers must always be aware of any type of signal, whether automatic or manual. Asking for confirmation from passengers is not relevant to train operations, as passenger input does not provide the necessary information about track conditions, signals, or operational safety. Therefore, maintaining vigilance in observing signals is essential to ensure safe and efficient train movement in Release mode.