The U.S. Coast Guard joined the search for a 44-year-old diver who vanished in the waters off Hawaii’s island of Kauai. 

Bryson Higashi was last seen around 4:30 p.m. local time Tuesday near Hanalei, a town on the island’s northern coastline, according to the Coast Guard. 

"Coast Guard Sector Honolulu command center watchstanders received a notification at 7:36 p.m. Wednesday from Kauai Fire Department personnel of a possible person in the water near Hanalei Bay," the agency said. 

"Watchstanders issued an urgent marine information broadcast and coordinated the diversion of a Coast Guard Station Kauai 45-foot Response Boat-Medium crew, an MH-65 Dolphin helicopter crew and an HC-130 Hercules airplane crew from Coast Guard Air Station Barbers Point," it added. "The Coast Guard Cutter William Hart (WPC 1134) crew also diverted for the search." 

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Officials said Higashi "may have gone missing while freediving." 

He is described as being 5 feet, 11 inches tall, weighing around 180 pounds. 

"Higashi’s truck was discovered near Hanalei Bay after being left unattended for a full day," the Coast Guard said. 

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The Kauai Fire Department, Kauai Police Department and the Hawaii Department of Land and Natural Resources are assisting in the search. 

"Your assistance could make a significant difference," the Kauai Police Department said in a message to the public. 

As of Thursday, the Coast Guard said on-scene weather conditions consisted of, "15 mph winds, 2- to 4-foot seas with occasional showers and reduced visibility."