The search was expected to continue through Tuesday, U.S. Coast Guard spokesperson Petty Officer Ryan Fisher said. The Hawaii County Fire Department was helping the Coast Guard search from the sea and air.
“Usually our incidents like this are along the coastlines. This is a different situation because it’s out in the deep,” said Darwin Okinaka, Hawaii County Fire Department assistant chief of operations.
According to police, Knittle and his friend were 4 miles (6.4 kilometers) from the Honaunau Boat Ramp.
“If there’s a fish that’s actually pulling him around, you don’t know where he could go,” Okinaka said.
Ahi can weigh several hundred pounds. Police described Knittle as weighing 185 pounds (84 kilograms).