After using an emergency alarm box, who should the trackman contact immediately?

Following the use of an emergency alarm box, the most appropriate action for the trackman is to contact the trainmaster immediately. The trainmaster plays a critical role in coordinating responses to emergencies by overseeing the operations of the train and ensuring safety protocols are implemented.

In emergency scenarios, the trainmaster has the authority to make quick decisions, deploy resources, and manage communication between various parties involved, including the train crew and dispatchers. This coordination is essential for mitigating risks and ensuring the safety of personnel and passengers.

While contacting other parties like the conductor, engineer, or dispatcher may be necessary later on, the trainmaster's position allows for immediate and effective management of the situation, making it the priority contact after an emergency alarm is triggered.