What must a crew member do at a hand-operated switch with no governing signal in ABS territory before entering signaled track?

The correct choice is based on safety protocols established for train operations in Automatic Block Signaling (ABS) territories. When a crew member encounters a hand-operated switch with no governing signal, it is essential to ensure the safe operation of the train before proceeding onto signaled track.

Waiting for a specified duration after opening the switch serves as a precautionary measure to ensure that any potential issues, like misalignment of the switch or the presence of other trains, are adequately addressed. This delay allows time for proper communication and confirmation of the switch's correct position before the train can safely proceed onto the signaled track.

In contrast, immediately opening the switch and proceeding without taking this extra time could lead to hazardous situations. It is critical to prioritize safety and make certain there are no conflicting movements on adjacent tracks. Similarly, contacting the control operator for approval might not directly align with the specific procedures for hand-operated switches in this scenario. Lastly, while ensuring the switch is set correctly is vital, leaving immediately afterward without a wait could compromise safety.