Advanced sonar equipment and technical personnel have been sent from Halifax to aid in the search for a 56-year-old man who fell overboard Monday while fishing on Cape Breton’s Mira River. Cape Breton Regional Police divers, fire department water rescue personnel and several local boats have been searching the river in the Albert Bridge area, where the man’s boat was found. The missing man is Murray Francis Reid, who is known to be an avid fisherman and sportsman.