"I rented that PLB from Track and Trail on Victoria St in Hamilton for $5 a day.
"It doesn't make any sense at all not to have one."
A helicopter arrived on the scene within an hour and whisked McCready off to Waikato Hospital, he said.
"I was there for two hours and they brought the heart rate down," he said.
His heart rate had been elevated at an abnormal 189 beats a minute up from his usual 70, he said.
"At that sort of heart rate you are at a high risk of a heart attack," he said.
McCready said he had 60 years of experience in outdoor adventures and misadventures, including completing the Central Otago Rail Trail five times and the Rimutaka Cycle Trail countless times.
It was the first time he had taken a PLB with him, he said.
McCready urged others to use PLBs on their adventures.