Potential buyers of the Royal Mail Ship St Helena might have to wait to set sail aboard the vessel. The vessel, which has plied between Cape Town and the remote Atlantic island of St Helena since it was launched in 1990, is being replaced by an air service.But it was announced yesterday that the airport's opening has been delayed indefinitely after test flights revealed dangerous wind conditions.Britain's Prince Edward was due to open the airport on May 21, St Helena Day, after arriving on the first Comair passenger flight from Johannesburg but that plan has had to be scrapped.Another airline, Atlantic Star, has been forced to postpone its planned link from the UK's Luton Airport to St Helena.The R5.25-billion airport, built by South African construction company Basil Read between mountains and the sea, was designed to boost tourism and revive the community in the British territory."It is a disappointment but when you are talking about airports everything revolves around safety," said Ian Jones, the St Helena government spokesman."There are some side winds and wind-shear that we knew about, but it is not until you land a full-size aircraft that you fully understand the conditions. We did not realise how serious it was."Jones said analysis of wind data, new observational equipment and adjustments to the approach route would be considered.A mountain ridge had to be lowered and a valley filled in during the construction of the airport.A spokesman at the RMS St Helena office in Cape Town said the ship's 128 berths had been booked months in advance of its last voyages. No decision had been made yet on extending its life. The vessel is for sale through shipbrokers CW Kellock...