Yacht Name??????

Does anyone know the name of the yacht? It was seen just off Al-Ras, Dubai. A helicopter took off from the stern before my work colleague could take a photo of it. It was closely shadowed by a naval frigrate. Someone I know says it belongs to one of the Microsoft founders. Any ideas? May seem a bit silly to those of you who know it but i couldn't find its name anywhere on the net. Thank You! Photo was taken last week if that helps.