Is-disarmed-delay
From FreeSpace Wiki
Is disabled delay (Boolean operator) Becomes true <delay> seconds after the specified ship(s) are disabled. A ship is disabled when all of it's engine subsystems are destroyed. All ships must be diabled for this function to return true. Returns a boolean value; Takes 2 or more arguments: 1: Time delay is seconds (see above). Rest: Names of ships to check disabled status of.