The Bundaberg RACQ LifeFlight Rescue helicopter has returned to base after searching part of the Wide Bay coastline for a diver who has been missing since Saturday morning.
The skipper reported the man, aged in his thirties, missing after he failed to resurface.
The Queensland Police Service (QPS) first sent the helicopter to the search area on Sunday.
Over the past four days, the crew have spent almost 15 hours searching for the diver from above.