The traditional sailing ships or sailing boats belonging to the Bootnodig fleet were used in the past for transporting goods until around the Second World War. This was mostly done via shallow lakes, rivers and canals, forcing planners to limit the draught of ships. The result is the design of a flat bottom, the word says everything a flat bottom, with the corresponding shallow draught (usually about 50 cm). Another advantage of this model is that the interior is often very practical to design, which in turn leads to much comfort for the sailors.