In the light of the old inventory books of the Teutonic Order from the 2nd half of 14th century until 1525, castles in Prussia used the following watercraft for their water transport (rivers, lagoons and lakes): • often ships – in most cases nasady (nasuty) boats, less often punts, korabik-type vessels, dubas boats, burdyna-type, lichtany-type or Dejma and Vistula ships, along with specialist vessels (fishing boats, vessels to transport food, wood, carts, cannons and people); • often ferries and rafts; • often various boats (inland, Vistula, fishing, escorting, transporting, szeląg boats, keel boats).