Den Helder, Netherlands 26 September 2018
Netherlands-flagged, MMSI 24420141, ENI 2013745 and call sign PD8617. Built by Johannes Slichting, Yacht and Bootswerft, Travemünde, Germany with yard number 1219 in 1952. Displacement 182 tons and as dimensions 24,00 (between perpendiculars)-26,36x 7,30 x 1,90 x 8,50 (hold) metres. Original name unknown, renamed Alca in 1991 of Kooijman&Zn BV, Harlingen, Netherlands, renamed Corbina in 1993 and renamed Hercules in 2000. Former tug/icebreaker/auxiliary buoy layer Alk of the Wasserstrassen- und Schiffahrtsamt Lubeck, Germany.
