The first of the new Pilot Cutters delivered by Damen Shipyards to Serco Denholm as part of the contract to supply 29 new vessels was SD CLYDE SPIRIT, which was handed over in June 2008. Built to their successful Stan Tender 1905 design, SD CLYDE SPIRIT was exhibited at the Seawork 2008 International Exhibition at Southampton shortly after delivery. Steel hulled, she has aluminium upperworks, and is 19.15 metres long. Twin Caterpillar engines give her a maximum speed of 20 knots. She is one of two Pilot Cutters which have been brought into service on the Clyde, the other being the smaller SD CLYDE RACER.