Fastnet Jack 1 and Fastnet Jack 3 are modular jack-up barges built in 2009/2010 using Combifloat C5 modular float units that can be transported by road. The barges can be assembled in various configurations using C5 Quadra and Duo float units to suit customer needs and provide a minimum floating and elevated stability. Crew facilities include mess facilities, WC, and changing/storage areas. The barges are suited to site investigations, piling, crane work, and horizontal directional drilling projects.