Crews completed a fourth day of searching Saturday without any sign of the five missing aviators aboard an Army UH-60 Black Hawk helicopter that went down off Kaena Point.

The city, state and federal teams so far have conducted 75 sorties and covered more than 61,000 square miles, the Coast Guard said in a statement.

Small pieces of debris continued to be recovered along the shore near Kaena Point. On Friday, no debris was found at sea.

The search Saturday reached as far as 160 miles offshore from Kaena Point, having been expanded because of currents and swells in the area. Search planes and the Coast Guard cutter Galveston Island were scouring the leading edge southwest of Kauai.

Helicopters and the cutter Walnut were scanning the area about 35 miles offshore of Kaena Point.

Shoreline crews from the Honolulu Fire Department, Army and Coast Guard were searching along the North Shore from Kaena Point to Dillingham Airfield, while the Kauai Fire Department was assisting along Kauai’s south shore.

The search began Tuesday night after Army personnel lost contact with a Black Hawk aircrew conducting night training off Oahu.

A safety zone restricting access to authorized vessels or people remains in effect for an area extending 5 nautical miles out from a point about 2 miles northwest of Kaena Point. A command center has been set up at Haleiwa Boat Harbor.

Debris from the crash should be considered hazardous and reported to the Army at 656-1080.