It was only when they got up to investigate if there was a fish on the line that they discovered they were missing their mate.
The skipper said he dialled 111 immediately and got the yacht turned around and sailed north again looking for Mr Vercoe.
"It was a stressful few hours. It was a super scary experience ... it's a big ocean out there."
As night fell and the crew anchored up they were contacted and told Mr Vercoe had been rescued and was still alive.
"It was a huge relief."
The skipper said he sailed up and down the Northland coast all the time and the incident had been a salutary lesson.
"We will rethink our safety plan. There are a lot of little things we can do especially if we have new people onboard.
"I'm considering personal emergency locator beacons. It's expensive to set up but how much is a life worth?"
He said there would be no more peeing off the back unless the rest of the people on board were informed.
The yacht sailed into Whangarei on Sunday night and the crew caught up with the exhausted Mr Vercoe to share a few beers.
Mr Vercoe said yesterday his legs were still tired as they had started to cramp at the end of the three hour swimming ordeal.
"I'm still recovering and resting up.
"It's all sinking in now and I was pretty lucky."
He said he had learnt his lesson as well and would be wearing a lifejacket the next time he took to the water.