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Matt Silver-Vallance flies above Table Bay, with some of his support crew in boats from Nelson Mandela's apartheid island prison using helium-filled giant party balloons, on April 6, 2013.
Helium contained in a small balloon floats nearby the Aeroscraft. The ship's exterior is rigid, but made of special honeycomb-like chambers designed to hold helium.
The craft is designed to take off vertically and cruise at up to 130 miles an hour at an altitude of 12,000 feet.
The Aeroscraft will be able to travel thousands of miles on a single tank of fuel, carrying 66 tons of cargo
A full-sized Aeroscraft does not need a runway or an airport and is capable of delivering tanks to military sites.
It could also be used for transporting large, heavy industrial equipment such as wind turbines to remote locations.
A South African man on Saturday successfully flew across the sea from Nelson Mandela's apartheid island prison using helium-filled giant party balloons.
The six-kilometer (3.7-mile) crossing, to raise funds for a children's hospital named after the country's former president, was the first stunt of its kind from the historical site.
Matt Silver-Vallance, 37, took around an hour to float across the Atlantic Ocean from Robben Island while harnessed to a mass of mufti-coloured balloons in grey, drizzly conditions with low visibility.
Making his way wearing a wetsuit, he floated a few meters above the sea, with controls for flight including bags weighted with water and an air gun and make-shift spear to pop balloons.
"Wow, that was crazy," he said, saying he felt "unbelievable" after landing in a rubber duck around 300-400 meters (985-1,310 feet) from shore once the balloons were released.
"Don't try this at home," he quipped.
With no test run ahead of lift-off, a total of 160 balloons were inflated on the island early Saturday morning, with several popping ahead of departure.
Silver-Vallance popped around 35 more balloons during the trip to manage his equilibrium. A hard ground landing was ruled out as too risky.
The daring mission aimed to raise 10 million rand ($1.1 million, 852,000 euros) for the Nelson Mandela Children's Hospital which will be built in Johannesburg.
"We're trying to raise as much money (as possible) for the Nelson Mandela Children's Hospital and we really see this project as a catalyst," Silver-Vallance said ahead of take-off.
The hospital will be part of Mandela's legacy and the balloon run was a "small thing" to try to remind people of everything the 94-year-old anti-apartheid icon had done, he said.
"The risks that I'm taking are tiny compared to the risks that he took," he said, adding he was not a dare-devil.
When asked what message he had for Mandela, an emotional Silver-Vallance said: "I think like most South Africans we all love him very much," he said.
He said he hoped the flight "could bring a smile to (Mandela's) face,"
Later, after the flight, Nelson Mandela was discharged from hospital after being admitted 10 days ago for a bout of pneumonia.
There have only been 12 previous such balloon flights in the world -- two of which were fatal -- according to Silver-Vallance, who now lives in Britain.