Page 4th Cover: of Maritime Reporter Magazine (October 2000)

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One of the most labor- and fuel-efficient bulk material carriers on the Great Lakes entered service in June 2000. The self-unloading barge Great Lakes

Trader is owned by Great Lakes Marine Leasing,

Portland, Ore., and operated by VanEnkevort Tug and Barge, Bark River, Mich. The 740 x 78 ft. (226 x 24 m) Trader is the largest vessel capable of fitting through the St. Lawrence Seaway locks. Combined with the 10,200-bhp (7,600 bkW) tug Joyce L.

VanEnkevort, the new integrated tug/barge (ITB) unit is the biggest dual-mode ITB on the Great

Lakes.

The 39,600 long ton (40,234 metric ton) capacity

Trader was designed by a team of engineers direct- ed by navel architect Joe Fischer, president of Bay

Engineering, Inc., Sturgeon Bay, Wise. Halter

Marine built the vessel in two halves at their

Pearlington, Miss., facility and finished it at their

Gulf Repair Yard in New Orleans, La.

The self-unloading design incorporates internal gravity-fed gates leading to a hydraulically driven single-belt Ems-Tec conveyor system capable of unloading 6,000 long tons (6,096 metric tons) of iron ore pellets, coal, or crushed limestone per hour.

This efficient ship unloading system receives power from seven Cat 3406C engines rated 462 bhp (345 bkW) at 1,800 rpm. The 3406s drive Rexroth and Vickers multiple pump hydraulic drive units.

This arrangement, with multiple engines rather than one or two larger engines, allows greater flexibility in the barge's operation. Engine service is easier to coordinate, and the crew operates only as many engines as are needed.

Barge electrical power is provided by a Cat 3406C gen set rated 260 ekW at 1,800 rpm. Cat Dealer

Ohio Engine Power, Cleveland, Ohio, provided all pump engines for Great Lakes Trader, and Cat

Dealer FABCO Engine Systems, Green Bay, Wise., provided the generator set.

Circle 54 on Reader Service Card

Main Particulars

Length 740 ft (225.7 m)

Beam 78 ft (23.8 m)

Hull Depth 45 ft (13.7 m)

Carrying Capacity 39,600 long tons (40.234 metric tons)

Unloading Rate 6,000 long tons (6,096 metric tons) per hour

Auxiliary Engines 7 X Cat 3406C rated 462 bhp (345 bkW) at 1800 rpm for multiple pump hydraulic drives

I X Cat 3406C gen set, 260 ekW at 1800 rpm

USS Roosevelt Is Newest Aegis Destroyer The 510 ft. (155.4 m), 9,300-ton destroyer, which is the 30th vessel of the DDG 51 program, is sponsored by Nancy Roosevelt Ireland, granddaughter of

Franklin D. and Eleanor Roosevelt, for whom the vessel is named.

Roosevelt is equipped to carry Tomahawk Cruise missiles, as well as Standard missiles to intercept hos- tile aircraft and missiles at extended range. Powered by four gas turbine engines, the vessel is able to move at speeds in excess of 30 knots.

USS Roosevelt, the newest in a series of Aegis destroyers being constructed for the U.S. Navy by

Litton Ingalls Shipbuilding, is scheduled for an Octo- ber 14 commission in Mayport, Fla.

Hike Metal Constructs Boat For

Pilotage Authority

A new 60 ft. (18 m) fast Pilot boat is being con- structed at Hike Metal Products, Ontario, Canada for the Atlantic Pilotage Authority. Responsible for

Pilotage operations on the east coast of Canada, the

October, 2000 Circle 324 on Reader Service Card 65