In the old days, ships that were used on inland waters, were build with flat bottoms to enable them to sail in shallow waters. To prevent them from drifting sideways with the wind, they were fitted with leeboards that could be raised or lowered as the situation demanded. One of these flat-bottomed ships was the Frisian Tjalk or Skûtsje.

The “Torborg” is a classical Norwegian rowing and sailing boat. This type of vessel is widely known in Norway and was used for many purposes.