Has-undocked-delay
From FreeSpace Wiki
Has undocked delay (Boolean operator)
Becomes true <delay> seconds after the specified ships have undocked the specified number of times.
Returns a boolean value; Takes 4 arguments:
1: The name of the docker ship
2: The name of the dockee ship
3: The number of times they have to have undocked
4: Time delay in seconds (see above).
Comments
Use this if you want a transport to depart as soon has it has undocked from its target. Don't confuse this SEXP with its direct counterpart, has-docked-delay, or weird events may occur ingame.