HMS Dragon is the fourth of six Type 45 destroyers being built for the Royal Navy. All will be based in Portsmouth. The first, HMS Daring, was commissioned in July 2009 and the fifth, Defender, is due to arrive in Portsmouth for the first time this summer. All six are scheduled to be in service by the middle of the decade. Hundreds of guests including families of the 190-strong ship's company attended a colourful 'christening' ceremony at Portsmouth Naval Base which marked the ship's transition into front line service.