Name: Gerhard
Type of vessel: Semi-submersible, workboat
Year of construction: 1964
Modification: 2010/2011
Gross tonnage (GT): 531
Net tonnage (NT): 159
Length: 60.06 m
Width: 15.11 m
Molded depth: 2.13 m
Draft: max. 1.35 m
Load capacity: 670 t
Two access ramps of 120 tons each.
Dredgers or cranes can be used up to a weight per device of 250 tons.
Maneuvering with 4 hydraulic rope winches of 150 kN each and 4 hydraulic lifting spuds each with a length of 30 m.
crawler crane Liebherr HS 895 HD. The boom has a length of 20 m and can be extended to 84 m.
Navigational area: Coastal area RSA (20 Sm)
Owner: Colcrete von Essen, coastal protection
Recorded in Warnemünde, Germany.