The skipper of PRB hit a UFO on Sunday morning, while speeding along with the frontrunners in the Vendée Globe on his way towards the Cape of Good Hope (a different incident from yesterday’s, when his rudder kicked up). Following on from this collision, Vincent Riou did not initially notice any damage and was able to continue to sail normally. It was only three hours later that the keel started to vibrate and emit loud noises, indicating there were huge strains on the appendage. These sounds continued to grow during Sunday night.
Taking into account the weather conditions (25 to 30 knot winds with average speeds around 19-20 knots), Vincent was unable to go and check the keel housing, but informed his shore team of the incident. The PRB team and the boat’s designers (Guillaume Verdier) and the structural calculations team at HDS GSEA Design (Hervé Devaux and Denis Glehen) began to study all the hypotheses based on what they knew (essentially the type of noise coming from the keel).
It was only this morning while sailing in calmer conditions that Vincent was able to carry out the necessary checks.
He discovered that the axis of the keel had been damaged in the collision. This titanium part is an essential element on the boat. It allows the keel to be attached to the monohull with a plastic ball joint and it is also this axis that allows the keel to be canted. They have made the decision to retire. More here.