checklist
Set point, continuous, cycle, pre-cool
Temperature is an instruction, not a sticker on the door.
Write the set point the shipper wants. Continuous means the unit runs to hold it. Cycle means it runs in a range. They are not synonyms.
Pre-cool the trailer before the freight goes in. A reefer is often a bit heavier than a dry van of the same length because of the unit, so a typical payload is a bit lower. Confirm it on that truck.
The course that goes further is Dispatch foundation. Reading this note does not enroll you.