Which of the following is a necessary protocol before switching an industry in 251 territory?

In 251 territory, where train movements are governed by specific rules to ensure safety and efficiency, proceeding at Restricted Speed after stopping is a critical protocol before switching an industry. This approach ensures that the train is moving at a speed low enough to stop within the distance visible ahead. It prioritizes safety, allowing the crew to react quickly to any obstacles or hazards that may be present on the track.

By stopping the train completely before proceeding, the crew confirms their awareness of their immediate surroundings and can then move at a restricted speed, allowing for necessary caution as they approach or interact with the tracks and equipment in the industry. This practice helps in preventing accidents and ensuring compliance with safety regulations in areas where control of train movements is particularly sensitive.