An Apple Watch enabled the remarkable rescue of a Victorian father and son after they went missing in a kayak.

Andrew and Charlie Telburn left on Leopold’s ship to Geelong last Wednesday with the intention of camping in Portarlington.

Watch more about the remarkable rescue in the video above

But their kayak quickly began to sink after setting out to sea.

“What was really noticeable was that we weren’t moving forward because we were very low in the water so we were paddling furiously,” said Mr Telburn.

“We rowed for an hour and were still in one spot and knew we were in trouble then.”

Mr Telburn managed to alert his wife and authorities to their predicament through his Apple Watch as the water rose into the kayak, starting to overwhelm them both.

He said the last thing his wife heard through the device was screaming.

From the rescue helicopter, the kayak was barely visible through heavy fog, but the watch was able to give the rescue boats the coordinates of the pair – a function that ended up saving lives.

Coast Guard volunteer Tony Warren and water police found the couple next to a mussel farm.

“People in the water don’t last long,” Mr. Warren said.

Chief Constable Stephen Carter said the conditions were very cold and an additional 15 minutes at sea could have meant hypothermia for both father and son.

Son Charlie said the situation was “scary” but made sure he didn’t panic.

Mr Telburn and Charlie thanked their rescuers on Sunday and said they believed if they weren’t wearing life jackets they might not be there to tell the story.