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Trailing Suction Hopper Dredger “Irbensky”

Length over all 80,5 m
Breadth 15,1 m
Draught empty / loaded 4,0 m / 5,6 m
Speed 10 knots
Gross tonnage/ Net tonnage 2.607 / 782
Hopper capacity 1.500 m3 / 1.964 dwt
Max. dredging depth 20 m
Suction pipes diameter 2 x 600 mm
Dredging pumps 2 x 460 kW IHC HOLLAND electric
Water-jet pumps 2 x 147 kW @ 560 m3/hr, 7 kg/cm2, electric
Discharge systems 2 x 7 hydraulically operated bottom doors
Bow thrust JW BERG A" 260 kW
Main engines 2 x Sulzer, each 1.108 kW
Installed power 2.216 kW
Fuel consumption Gasoil - 10 mt per 24 hrs.
Propulsion 2 x pitch propellers
Classification Russian Maritime Register of Shipping
Construction yard 1980, Broda–Split, Croatia ; Sh/Y No 333
Port of registry St Petersburg
Flag Russian
Call signal UBLJ
IMO No 7905766
Displasement 3833

Trailing Suction Hopper Dredger “Gibraltar”

Length over all 110,1 m
Breadth 20,40 m
Draught empty / loaded 5,1 m / 8,5 m
Speed 10 knots
Gross tonnage/ Net tonnage 7.086 / 2.125 mt
Hopper capacity 4.700 m3 / 6.433 t
Max. dredging depth 25 m
Suction pipes diameter 2 x 700 mm
Dredging pumps 2 x 810 kW IHC HOLLAND, electric
Water-jet pumps 2 x 350 kW @ 1000 m3/hr, 8 kg/cm2, electric
Discharge systems: 2 x 9 hydraulically operated bottom doors
Bow thrust LIPS B.V. 500 kW
Main engines 2 x SWD 6TM410 each 3250 kW
Installed power 6.500 kW
Fuel consumption IFO 80 - 20 mt per 24 hrs
Gasoil – 2 mt per 24 hrs
Propulsion 2 x controllable-pitch propellers
Classification Russian Maritime Register of Shipping
Construction yard 1986, IHC HOLLAND
Port of registry St Petersburg
Flag Russian
Call signal UDWN
IMO No 8505678

HD "PECHORA" IHC Beaver 6016W wheel dredger

60 - Diameter of discharge pipes = 600 mm
16 - Maximum standart dredging depth = 16 m
W - Wheel dredger (Wheel)

Shipyard №02422

Principal particulars

Lenght overall, ladder raised 55,00 m
Lenght over pontons, moulded 44,00 m
Breadth, moulded 12,44 m
Depth, moulded 2,97 m
Max draught 2,10 m
Maximum standard dredging depht 16,00 m
Internal diameter of suction tube 650 mm
Internal diameter of discharge pipes 600 mm
Total installed power 2602 kW (3538 hp)
Total dry weight approx 455 т

Dredgepump
Power at shaft 1493 kW (2030 hp)
Prime mover Caterpillar 3516 В, мощностью! 588 kW

Electric installation
Voltage 24 V
Capacity 550 Ah
Voltage 230X400 V, АС 50 Hz
Capacity 25kVA

Dredging wheel
Type 4458
Power at shaft 585 kW(795 hp)
Diameter 4400 mm

Maximum speed about 13 rev/min


Winches
Ladder winch Swing winches
Line pull 1st layer (t) 29,0 15,0
Max Line speed (m/min) 20 20
Wire diameter (mm) 40 28
Drum diameter (mm) 813 610

Hydraulic drive
The two swing winches are supplied with wire of 150m and anchors of 800kg


Spuds
Length 21,4 m
Diameter and Weight 900 mm 13,8 t