Copter808 From United States of America, joined Dec 2000, 677 posts, RR: 0 Reply 1, posted (8 years 3 months 2 weeks 22 hours ago) and read 1317 times:
It would only be a matter of feet, decreasing to zero as the second aircraft makes contact with the refueling nozzle.
It appears that the second aircraft in lining up to refuel, but it appears that he has not yet made contact with the boom.
In case of emergency, the second aircraft would most likely break loose and descend, then take whatever action would best suit the situation.