Oceangoing Split Hull Self-Propelled Dredge Completes Trials In Gulf
The hopper dredge Manhattan Island, first split hull, self-propelled hopper vessel built in the U.S., completed its sea trials recently, and was awarded certification by the American Bureau of Shipping and the U.S. Coast Guard.
Initial trials were held in Lake Pontchartrain, La. Because of its unique design, additional trials were held in Gulfport, Miss.
The purpose of the trials, which are required by the U.S.
Coast Guard and ABS, is to put the ship through a series of tests for general seaworthiness and to evaluate her dredging capabilities, according to J.R. Gillespie, general manager of North American Trailing Company which owns and operates the dredge.
The demonstration of dredging capabilities was also observed by the U.S. Army Corps of Engineers.
The North American Trailing Company is a subsidiary of Great Lakes Dredge & Dock Company of Chicago, with the participation of Amsterdam Ballast Dredging of Amstelveen, the Netherlands.
Certificates of both ABS and the U.S. Coast Guard define the class of the ship and her load line. Because of U.S. Coast Guard certification, she will be registered as a U.S. vessel for service in all oceans. The proper manning requirements are also stipulated.
The ship will initially be employed by NATCO on the Eastern Seaboard and Gulf Coast, working on maintenance dredging and beach nourishment projects under the management of the U.S.
Army Corps of Engineers.
The board of directors recently authorized the construction of a second hopper dredge to the NATCO fleet, according to J.A.
Downs, president. "The plans and specifications will be made available to various shipyards within 30 days." Captain of the Manhattan Island is Leroy Piatt, who formerly served with the Marine Division of Bethlehem Steel Corporation.
The Manhattan Island has a carrying capacity of 3,600 cubic yards, with a split hull made up of two longitudinal half sections hinged together at the deck.
"The concept is almost 100 years old," according to Mr. Gillespie, "but this is the first time it has been incorporated into the design of an oceangoing selfpropelled hopper dredge." The ship is 281 feet long, with a loaded draft of 19y2 feet and a light draft of 9% feet. The total installed horsepower is 6,750, operating for 14 days without refueling.
It cruises at 12.5 knots light and 11.5 knots loaded, and has a capability of dredging to a depth of 70. feet.
Great Lakes Dredge & Dock Company, the largest dredging contractor in the Western Hemisphere and one of the largest in the world, is listed on the New York Stock Exchange. In addition to the corporate headquarters in Chicago, 111., the company maintains offices on the Atlantic, Pacific and Gulf Coasts, as well as overseas offices in Argentina, Venezuela, Saudi Arabia and the United Arab Emirates.
Other stories from September 1977 issue
- Lloyd's To Class Two Large Crane Barges To Be Built By Mitsui page: 4
- Estimated Foreign Cost Of Two LNG Carriers $115.5 Million Each page: 6
- McAllister Brothers Name Robert Lounsbery Chief Operating Officer page: 7
- Lockheed Wins Contract To Evaluate Ocean Platform Candidates page: 7
- Bethlehem Steel Names G.Y. Marriner Manager San Francisco Yard page: 7
- AMPAC To Build Four Container Feeder Ships At Cost Of $92 Million page: 7
- MarAd Approves Title XI For Five Moran Tugboats page: 8
- SNAME New York Section Announces Program For 1977/1978 Season page: 8
- Willamette Awarded $15 Million To Modernize Alaska State Ferry page: 9
- Marathon Manufacturing Adds $61 Million To Drilling Rig Backlog page: 9
- NASSCO Building 188,500-DWT Tankers For Alaskan Oil Trade page: 10
- Exxon Begins Operating Remote Sea-Floor Production System page: 10
- Propeller Club Convention Includes Shipyard Panel page: 11
- MacMillctn Bloedel Orders Log Carrier At Cost Of $14 Million page: 12
- C-E Names Matthews Manager Of Contracts, Marine Power Systems page: 12
- Role Of Ro/Ro Shipping In Dry Cargo Trade page: 12
- Port Of New Orleans Presents Key To City To Egyptian Official page: 13
- Representatives Meet For First Time In Bahrain page: 14
- Marystown Shipyard Reports On Progress Of $23-Million Norwegian Tugboat Contract page: 14
- Dravo Awarded Two Contracts Totaling $7 Million page: 14
- Morris Guralnick Associates, Inc. Name Hubert E. Russell page: 14
- Canada's Newest Great Lakes Bulk Carrier Launched page: 16
- Todd Seattle Division Lays Keel For Royal Australian Navy Frigate page: 18
- Title XI Approval For Two IOT Subsidiaries page: 18
- Jerry D. Icenhower Named President Glitsch Cryogenics page: 18
- Hillman-Designed New Class Towboat Delivered To Exxon At Baton Rouge page: 19
- BP Invests $50 Million In Stolt-Nielsen page: 20
- Speakers Named For Weather Conference September 14-15-16 page: 22
- $45-Million Subsidy Repayment Approved page: 23
- Study Shows Worldwide LNG Production Increase —60 Carriers Needed page: 24
- Bethlehem Steel Subsidiaries Name Collins And Coulahan page: 25
- Gotaverken Converts Cargo Ship To Carry 32,000 Live Sheep page: 25
- Halter Marine Delivers Large Supply Boat To George Engine Co. page: 26
- Bethlehem Steel Shipbuilding Names Roland V. Danielson —Hollinshead De Luce Retires page: 26
- Perspectives On Third World Port Development page: 30
- APL Names Hubbard Senior VP Operations page: 31
- New National Supply Anchoring Windlass page: 31
- Shallow Water Maneuvering Trials Completed In Gulf page: 32
- Farrell Sale And Leaseback Agreement Approved By MarAd page: 32
- Delta Steamship Names Badger And Collins page: 32
- Gross Tonnage In ABS Classification Exceeds 100-Million Mark page: 33
- Airfilco Appoints Kevin McPherson page: 33
- CCN Of Brazil Launches New Type Bulk Carrier page: 33
- 51st Annual Propeller Club Convention And 1977 American Merchant Marine Conference Set For Galveston, Texas, Oct. 10, 11, 12, 13 And 14 page: 34
- Bulletin Describes Heavy-Duty Oil Filtration Systems page: 35
- Eight-Page Brochure Describes National's Fully Hydraulic Cranes page: 35
- Joseph Hurley Named President ITT Decca Marine page: 36
- Oceangoing Split Hull Self-Propelled Dredge Completes Trials In Gulf page: 37
- ITT Decca Marine Introduces 'Clearscan' New Radar Technique To Reduce Interference page: 38
- Todd Shipyards Los Angeles Division Lays Keel For First Of Six U.S. Navy Frigates page: 38
- MacGregor Slewing Ramps Successfully Tested page: 39
- Skagit Corporation Announces European Dealership Agreement page: 40
- FMC Marine & Rail Lays Keel For Ro/Ro Barge To Carry 374 Forty-Foot Truck Trailers page: 40
- Egyptian Shipyard Receives License To Build Willard Boats page: 42
- Bergeron Industries Names Captain Tatman page: 42
- Port Authorities (AAPA) 66th Annual Convention Set For Mexico City page: 43
- Lloyd's Register Completely Revises Rules For Marine Refrigerated Cargo Installations page: 44
- Tanker Design Change Approved By MSB page: 44
- Navy Contracts For Additional Years Of MARISAT Satellite Service page: 46
- Mitsubishi Receives Tug Barge Systems' License To Build page: 46
- Petro-Marine Names Murray Burns Manager Process Engineering page: 47
- Norshipco Dedicates New $5-Million Repair Pier page: 47
- COMSAT General Expands MARISAT Services To Entire Indian Ocean page: 48
- U.S. Lines Names Three In Operations page: 48
- Fetzner Named President Sun Trading & Marine page: 48
- Philippine Center Exhibit Highlights Filipino Seaman page: 49
- Henschel Announces New Steering-Failure Alarm page: 49
- Tulsa Port Of Catoosa Sets Tonnage Record page: 49
- Jane's Fighting Ships 1977-78 Revised Edition page: 49
- Stanford Research Awarded $271,000 For Firefighting Study page: 50
- Gulf Oil Trading & Transportation Announces Management Changes page: 51
- Renegotiation Board Erred In Computing Lockheed Steel Usage page: 51
- Pott Industries Names Miller VP Offshore Marine Services Div. page: 54
- Joseph R. Burgess To Head Central Pacific Shipping Agency page: 56
- Capt. James F. McNulty New Dean At Maine Maritime Academy page: 56
- Richard Daschbach Named Federal Maritime Commission Chairman page: 57
- Keene Brochure Describes Marine Discharge Control System page: 57
- Heavy Weather Ship Operation Subject Of Webb Seminar page: 58