In the context of a Siemens rescue, what does an assisting Siemens do first?

In the context of a Siemens rescue, the first action taken by an assisting Siemens is to isolate electrical couplers on both trains. This step is crucial for safety, as isolating the couplers disconnects the electrical supply between the trains, ensuring that there is no risk of electrical interference or accidental activation of systems while the rescue operation is taking place. It helps to clear the way for further actions to be taken safely, such as towing or stabilization without the risk of drawing power or creating unsafe conditions from an interconnected electrical system.

Establishing this isolation lays the groundwork for any subsequent procedures, ensuring all personnel involved in the rescue can operate without electrical hazards.