Despite being hampered by broken sails, he and his companion struggled throughout Friday and Saturday to reach the coast.
But Mr Rendle said that at 4.10am on Sunday, the pair sent out a Mayday call after the vessel started taking in water and they found their pumps unable to cope. A cargo ship MV Asian Adonis heading from Auckland to Wellington and Lyttelton offered to assist and started steaming to the yacht's position as the Rescue Co-ordination Centre directed the Auckland helicopter to the scene.
Helicopter pilot Rob Anderson said his four-member crew had to fly further off-shore than normally required, but the rescue went without a hitch.
"There is more risk, so it was a rewarding rescue that went to plan with no hiccups." Although the two yachties had launched a life-raft in case they had to abandon ship to make it easier for the helicopter to rescue them from a 3m swell. Mr Anderson said a medic was lowered to the vessel's deck so they could be lifted to safety.
He said there was a strong southwesterly breeze at the time, gusting to about 25 knots.
The pair, despite being exhausted, were unhurt from their ordeal but "very pleased" to be lifted off the yacht and taken to Tauranga.
Mr Rendle said the yacht's locator beacon was yesterday giving its position as about 47 nautical miles (87km) north of White Island.NZME.