What action must be taken after the operation of a switch?

After the operation of a switch, confirming its position and securing it is crucial to ensure safe and correct railway operations. This step verifies that the switch is in the desired position for the movement of trains and that it is properly locked to prevent any accidental misalignment. Securing the switch also helps establish a clear understanding among crew members about the track layout, maintaining operational integrity and safety.

In contrast to this option, other actions such as reporting to the dispatcher or notifying the control room might be necessary in certain circumstances but do not directly relate to the immediate procedural requirement after operating a switch. Similarly, marking it as inspected may come into play during maintenance checks, but it is not the action taken right after operating a switch. Thus, confirming its position and securing it represents the essential and immediate responsibility of personnel following the operation of a switch.