The most popular Parker model and available with either single/twin outboards or diesel form when fitted with the latest super economical and light weight Cummings-Mercruiser 1.7 TDI (120 hp) diesel with the Alpha One sterndrive or Jet drive . The diesel stern drive is proving incredibly popular and achieves in the region of 34/36 knots, yet burns as little as 8 litres per hour at a comfortable cruising speed of 28 knots. The 630 has one of the smoothest and driest rides of any RIB under 7 m and is equally at home as a general purpose family runabout or a serious offshore cruising rib, A very much performance craft for extended cruising or commercial use.