The new aircraft carrier - reportedly worth $5.8 billion - is named after her husband, so naturally she was in attendance.
In fact, she left her royal confines to act as Lady Sponsor at the Portsmouth, Hampshire event.
According to a Royal Navy spokesperson, Camilla is now the 'godmother' of the ship.
'The role of the lady sponsor is akin to being a godmother, attending significant events during the life of the ship and taking an interest not only in the ship's activities, but also the welfare of the ship's company.'
Making the wet a tad bearable was Bear Grylls, who no doubt gave Camilla some wet weather survival tips.