As Wagenborg's fleet of coasters rapidly starts to grow in 1953 it is sometimes difficult to find the inspiration for new ship names, so Wagenborg decides to name the ships after rivers with the extension "borg" added on.
And indeed, the "Kroonborg" is at that time the largest coaster in the Netherlands. She is built at Niestern in 1954, has a cargo capacity of 1,025 tons and is equipped with a 1200 HP Industrie diesel engine and the bridge is amidships. Maritime industry insiders often describe her as the most beautiful coaster they have ever seen.
During the fifties Wagenborg has a sizeable fleet of 500 tonners. Wim Vuursteen is closely involved in the preliminary studies and the building process. From his drawing board general plans originate for the characteristic Wagenborg vessels “Kroonborg”, “Oranjeborg”, “Nassauborg”, “Prinsenborg”, “Balticborg”, “Bothniaborg” and the new harbour tugboats.