I cut and paste the out of the Pro-C's manual.
1) Programmable Delay Between Stations
This feature allows the user to insert a delay
between when one station turns off and the next
station turns on. This is very helpful on systems
with slow closing valves or on pump systems that
are operating near maximum flow or have slow
well recovery.
www.sprinklerwarehouse.com/Hunter-Pro-C-Series-Controllers-Timers-s/83.htm