Final answer:
A movement can reverse direction only after one complete piece of equipment has fully passed through a semi-automatic switch, ensuring rail safety (c).
Step-by-step explanation:
A movement can reverse direction after trailing through a semi-automatic switch not until one complete piece of equipment has passed entirely through the switch. This is a safety protocol designed to ensure that the switch is not damaged and that any equipment moving over it has completely passed, preventing derailment or other accidents associated with moving switches under load. It is crucial for operators to understand this rule to maintain safety in rail operations.
When trailing through a semi-automatic switch, a movement can reverse direction not until one complete piece of equipment has passed entirely through the switch. This is because the switch operates based on the presence or absence of the entire equipment, not just parts of it. Therefore, once the whole equipment clears the switch, the direction can be reversed.