When a guards indicator lights up, what aspect of the obscured signal has been shown?

When the guard's indicator lights up, it signifies a proceed aspect. This means that the signal has been confirmed to allow movement, even if the primary signal is obscured. The guard's indicator serves as a safety measure to ensure that a train can continue its journey without unnecessary delays or hazards. This aspect ensures that the crew has the necessary information to proceed safely, knowing that the signal has been authorized for movement under those specific circumstances.

The other aspects indicated in the choices relate to different signal meanings. A danger aspect would indicate that the train should stop, while a stop aspect reinforces that requirement. The shunting aspect provides instructions for maneuvers typical in yard operations, which are distinct from the normal proceed aspect.