The intrepid refugee, clad in a windcheater and carrying a rucksack, is said to have been "at first disappointed, then very happy" when his rescuers arrived.
Nailed together from scrap timber to form a triangular raft with a "seat" made from foam wrapped in a tarpaulin, the rudimentary vessel was fitted with a mast made from a fibreglass pole anchored to a table leg or a stand for a garden parasol. It was powered by the bed-sheet sail tied to another pole and held in place by hand as its builder departed from the beach in sight of Sangatte, the site of the notorious refugee camp that once housed 1,500 refugees at a time until it closed in 2002.
Experts said the man would have had no chance of reaching the English coast because of the prevailing currents, which head east through the Channel rather than across it.
Mr Barron said: "It may be only 18 miles across but the currents are violent and there are many ships and tankers crossing the route. It was impossible for him to succeed. The current can reach six or seven knots - more than six miles an hour."
With at least 400 migrants gathered in makeshift, often squalid, camps in and around Calais, the pressure to take extreme risks to reach Britain is ever present as they attempt to beat both the UK's border controls and frequent raids by French police.
The Independent has been told of one incident late last year where a man clung to a 30cm-wide metal strip around the base of a ferry for the 90-minute crossing from Calais to Dover. He was found by port staff, wandering disoriented by hypothermia.
Much of the human traffic around Calais is controlled by criminal gangs who smuggle refugees from trouble spots such as Syria, Afghanistan and Eritrea on to lorries for a fee of about €1,000 (NZD $1600).
Those unwilling or unable to pay resort to unorthodox tactics which range from risking death by strapping themselves to the axles of lorries to swimming across the dock at Calais to reach ferries or a car park where vehicles have already been screened, often with fatal consequences.
- UK Independent