. . . the technical development of new lifeboats: (right) the latest 52ft Arun lifeboat, Duchess of Kent, the gift of the United Grand Lodge of Freemasons of England and destined for the relief fleet. The CRp-hul/ed Arun is the largest and fastest of the RNLI's fast afloat lifeboats. She is also the largest RNLI lifeboat to have an inherent self-righting capability..