In emergency management terms, it is called a mutual aid agreement between two like organizations. Each one agrees to help the other if it is physically possible to do so. We have seen media companies come to the rescue of one another at the time of a disaster — Hurricane Katrina comes to mind. But, this is a preplanned agreement that works out the kinks and sets the standards ahead of time.
Now if only every other media company, television and radio, would do the same with partner organizations!