Page 35: of Maritime Reporter Magazine (April 1993)

O&K Maritime, HDW Nobiskrug

Combine To Build

New Hopper Suction Dredger

Together with HDW Nobiskrug,

O&K Anlagen + Systeme GmbH re- ceived an order for the delivery of a hopper suction dredger. The two companies formed a consortium for building the dredger, which was or- dered by joint owners MS "Seekies."

The dredger is intended for use in extracting sand and gravel, up to a maximum grain size of200mm, from the Baltic, and transporting it to be treated and transformed into a high- quality concrete admixture. The dredger was designed to be economi- cal, as well as flexible under varying loading and unloading conditions.

For loading, the dredger is equipped with a side suction pipe.

In order to ensure high mixture con- centration, the suction pipe is fitted with a pressure-water activated suc- tion head and an underwater dredge pump. The underwater dredge pump is driven from the main diesel en- gine via a so-called electric wave.

The dredger can be unloaded with grabs and harbor cranes, or using a self-unloading system which is a new development. This system offers two possibilities for unloading: 1)

The load is fluidized, drawn off with the main diesel-driven dredge pump, taken to the screening towers, drained in the screening towers, and transported on shore with a slewable conveyor belt; or, 2) The fluidized load is drawn off by the dredge pump and transported to wet disposal sites through a shore delivery pipe. It is also possible to retrofit the dredger with a system for dumping the load at sea.

Diagram of the hopper suction dredger being built jointly by HDW and O&K Anlagen + Systeme GmbH.

Hopper Suction Dredger Equipment List

Main engines Deutz MWM

Propeller Lips

Generator engine VEM

Generators Deutz MWM

Reduction gear ABUS

Engine controls HNK

Loading towers O&K

Steering controls HNK

Deck machinery Hatlapa

Shafting Lips

Pumps O&K

Belt conveyor O&

RD Instruments

CLA-VAL...your safeguard for the future.

COMPANY HEADQUARTERS

CLA-VAL CO

P.O. Box 1325

Newport Beach, ® »AFFF System Control Valves CA 92659-0325 • Ballasting Valves

Lube Oil Unloading Valves FAX: (714) 548-5453

Regulating Valves

EASTERN DIVISION

CLA-VAL CO

Airport Center,

Suite 115 4250 Veterans 'Memorial Hwy.,

Holbrook, NY 11741 (516)588-3900

Telex: 12-6506

FAX: (516) 588-8529 CIA-VAI CO

Today's decisions must be the right ones for tomorrow.

Right in cost. Right in reliability. • Safeguard your decisions with

CLA-VAL...the name that stands for the best in valves.

Rugged.

Dependable.

Cost-effective, year-in, • You just can't beat forty years of experience.

PORT AND HARBOR

BROADBAND AD CP

Assure the

Safe Passage of

Ships in Your Port

A member of the

BroadBand product line

Circle 204 on Reader Service Card i JL.re you guessing water current speed and direction when vessels are being maneuvered into port? The

Port and Harbor BroadBand ADCP measures and reports the current speed and direction in your shipping channel, in real-time, without interfering with vessel traffic.

Harbor pilots can use this information to improve safety and to reduce transit time through the port.

The port authority can use the information to better manage ship traffic. You can use directly- measured data instead of interpolating tidal charts, extrapolating off-site data, or just guessing.

RD Instruments • Display real-time data directly measured in your shipping channel • Avoid interference with vessel traffic by mounting the ADCP on the channel bottom • Assure safe passage at other sites - Port entrance - Platforms - Moorings - Berths

Call RDI today to learn how a Port and Harbor BroadBand ADCP can be used to assure the safe passage of ships in and out of your port.

RD Instruments... for a sound picture of the oceans. 9855 Businesspark Ave

San Diego,CA,USA, 92131

TEL: (619) 693-1178

FAX: (619) 695-1459

Circle 253 on Reader Service Card

April, 1993 111