Final answer:
The motorman will know that his requested route has been registered in the tower if the (14-160) rule is followed.
Step-by-step explanation:
The motorman will know that his requested route has been registered in the tower if the (14-160) rule is followed.
The (14-160) rule refers to a guideline used in air traffic control to determine if a requested route has been approved or registered by the control tower. It states that if the difference in altitude between two aircraft is greater than 14,000 feet and the distance between them is less than 160 nautical miles, then the requested route has been registered.