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Modern dredgers in North-West German ports
Diesel electric twin screw trailing suction hopper dredgers, Johannes Gaehrs and Rudolf Schmidt, have been in operation for year; requirements were for working windforces up to 8 Beaufort and in high swells, and for good maneuverability; each has 2 lateral suction tubes; length oa is 113 m, beam 18 m, depth 8 m, draft loaded 5.90 m, capacity 4200 tons, dredging depth up to 21.5 m, speed 12 knots (modification possible to 14 knots).
Modern dredgers in North-West German ports
Diesel electric twin screw trailing suction hopper dredgers, Johannes Gaehrs and Rudolf Schmidt, have been in operation for year; requirements were for working windforces up to 8 Beaufort and in high swells, and for good maneuverability; each has 2 lateral suction tubes; length oa is 113 m, beam 18 m, depth 8 m, draft loaded 5.90 m, capacity 4200 tons, dredging depth up to 21.5 m, speed 12 knots (modification possible to 14 knots).
Modern dredgers in North-West German ports
Dock Harbour Authority
Kerkhoff, J. (author)
1962
2 pages
Article (Journal)
English
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Modern efficiency for old dredgers
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