KNM Olav Tryggvason Vessel specifications Name: KNM Olav Tryggvason Management for: Den Kongelige Norske Marine Flag: Norsk (NOR) Type: Marinen Design: ST-610 L Buildingyard: Gryfia Shipyard, Szczecin, Poland Building year: 2010 Gross tonnage (GT): 791 tonn Length (LOA): 49,60 meters