Length over all 28.00 m; breadth 5.9 m; sail area 320 sqm;
built 1930 by van Goor, Monnickendam / Netherlands, as fishing boat ENNI EN APPIE HD25; further names TWEE GEBROEDERS HD25, JOHANNA MARIA and ZWARTE RAT; 1977 rebuilt into sailing ship and finally named JANTJE;