What action is deemed unsafe when operating a stacker in a restricted space?

Passing through without checking the space is deemed unsafe because it increases the risk of accidents and collisions in confined areas. When operating a stacker in a restricted space, it is crucial to be aware of one’s surroundings to ensure there are no obstacles, personnel, or other equipment in the path. Lack of awareness can lead to serious accidents, resulting in injury or damage to the equipment or surroundings.

In contrast, moving slowly to avoid collisions is a safe practice, as slower speeds allow for better control and increased reaction time. Checking for clearance before passing is an essential precaution that helps avoid potential hazards, ensuring the equipment can safely navigate through the space. Additionally, stopping to assess the situation provides an opportunity to evaluate the environment and make informed decisions, which is vital for safe operation. Thus, the only choice that poses an immediate safety risk is passing through without checking the space.