Panama-flagged, IMO 8757740, MMSI 353979000 and callsign 3EAA4. Ex-DB102 renamed 22 November 1996 McDermott Derrick Barge No. 102, renamed Thialf on 6 March 1998. Gross tonnage 136.709 tons, summer deadweight 129.221 tons and as dimensions 201,6 x 88,4 x 31,6, a depth of 49,5 and a height of the crane144,0 metres or 661’ x 290’ x 104’ x 162’ x 472.4’. The transit draught of around 12 metres is ballasted to 26,6 metres by submerging the pontoons (with a draught of 13,6 metres). Laid down on 12 April 1985 by Mitsui Tamano Engineering&Shipbuilding, Tamano, Japan. Owned and managed by Heerema Marine Contractors, Leiden, Netherlands since 1997 after ending the joint venture HeereMac with McDermott. Fitted out with two cranes with a total lifting capacity of 14.200 metric tons. Fitted out with 6-5.550 kW retractable azimuth thrusters. Accommodation for 736 persons. Each of the two pontoons of which the hull consists had four columns.
