Page 34: of Maritime Reporter Magazine (December 1996)

Shipbuilders: ... .Avondole Industries

Ship Name: ... .Captain H.A. Downing

Ship Type: Tanker

Owner/Operator: AHL Shipping

INNOVATIVE CONVERSION

Though all other Great Ships men- tioned in this edition are newly con- structed, Captain H.A. Downing from

Avondale deserves recognition as a unique project and accomplishment.

The ship is the first of four AHL tankers being built as double-hulled ships with the addition of a new 510-ft. (155.4-m) long double-hulled forebody constructed by Avondale.

The new forebody is joined to the ren- ovated and modified existing stern sec- tion, where the engines, crew quarters and bridge are located — to complete the conversion into a modern, environmentally sound, double-hulled product carrier, and the first commercial, self-pro- pelled double-hulled tanker built in the U.S. to con- form with OPA 90 and the Jones Act.

The ship uses a steam-powered central hydraulic sys- tem to drive deepwell cargo pumps and deck machin- ery. It features a new accommodations house and an onboard vapor recovery and inert gas system. Meeting

USCG Type II requirements, the design, pumps and coatings systems are capable of transporting a wide range of products from Grade A petroleum to xylene.

Overall the ship measures 207 x 27.4-m, with a design deadweight of 39,431 metric tons. A 13,600-hp cross compound steam turbine main engine drives the vessel to a service speed of 15.5 knots. The vessel is outfitted with an array of the latest equipment, which can be reviewed in detail on the accompanying Main

Particulars list. One of the more unique aspects of this four-ship project is that it is being run through a yard which has relied completely on Navy business for many years. Subassemblies and modules for an LSD 52 and Fast Sealift Ship moved side-by-side with the 38,000-dwt AHL forebody through the covered factory, through the same blast and paint facility, and along the same path over the Mississippi River levee to their respective erection ways. "To accomplish this, every department of our ship- yard had to adapt to the accelerated schedule, reduced complexity, and highly streamlined requirements of the commercial job," said Ron McAlear, Avondale's vice president of Advanced Programs and Marketing.

Avondale and AHL formed a Tiger Team with the U.S.

Coast Guard to obtain early approval on a number of design documents that can typically delay a program.

According to Mr. McAlear, the Navy understands that commercial programs offer innovation as well as a prudent revenue supplement for the U.S. shipbuilding base. Avondale's 36,074-cu.-m. covered factory for modular construction was designed with the synchro- nization challenges of Navy and commercial work in mind. Construction is now progressing on the remain- ing three ships in the AHL program.

The second double-hulled forebody was launched on

September 25, and the new ship is to be christened

Anasazi. The double-hulled forebody for the third ship, which will be named New River, is also present- ly under construction at Avondale. A keel laying cer- emony was held on October 2, for the fourth ship, which will be named The Monseigneur. The double- hulled product carriers will transport refined products and chemicals.

Captain H.A. Downing Main Particulars

Designer: Avondale Industries, Inc.

Flag: U.S

Classification: ABS

Contract Date: May 12,1995

Float Out Date: July 31,1996

Delivery Date: October 3,1996

Length o.a.: 207 in

Length b.p.: 198.8 m

Breadth, Molded: 27.4 m

Depth, Molded: 16.4 m

Gross Tonnage: 24,846.2 M.T.

Displacement: 49,270 M.T.

Lightweight: 9,797 M.T.

Deadweight (Design): 39,431 M.T.

Deadweight (Scantling): 40,017.4 M.T.

Draft (Design): 10.97 m

Draft (Scantling): 11.2m

Speed (Service): 15.5 knots

Cargo Capacity: 42,000 cu. m.

Bunkers: 2,070 cu. m.

Water Ballast: 18,900 M.T.

Fuel Consumption: 60 tons/day

Percent of High Tensile Steel: 80

Main Engine Manufacturer: Bethlehem Steel

Main Engine Type:Cross Compound Steam Turbine, 13,600 hp

Propellers: Bethlehem Steel

Generator engines: General Electric

Generators: GE 500 kW, 450 VOLT AC

Emergency Generator:Steward & Stevenson 8V-92TA, 250 kW, radiator cooled diesel

Motor Starters: GE

Reduction Gear(s): Falk, double reduction

Steering Control(s): American Engineering, electric-hydraulic

Deck Machinery: Aquamaster and Techrane

Shafting: Bethlehem Steel

Coatings: Ameron Jotun-Valspar

VHF Radio: Sperry Marine GMOS system

SSB Radio: Sperry GMOS system

Radar: Sperry Rascar VT

Compass: Sperry MK 37 digital

GPS: Sperry NT 200 GPS PN 80926-00

Autopilot: Sperry

SatNav: Trimble

Pumps:Framo Cargo Pumps, ITT foam pump, Leistritz SV, scrub- ber and DK seal pump

Heal Exchangers: .Bethlehem Steel, C.H. Wheeler, Cochrane

Air Conditioning: Carrier

Lifeboats: Harding-Watercraft 6.5 M MKV, Saab engine

Liferafts: Viking 6 DK

Fire Fighting System: Herbert Hiller

Desalination Equipment: .(2) Bethlehem Steel, single-stage, 10,000 GPD

Cargo Control System: Framo

Ballast Control System: Scana Skarpenord level control

Computers: Scana Skarpenord

Stern Tube Seal: John Crane

Cathodic Protection: Wilson Walton

Inert Gas System: Permea

Shipbuilder:Halla Engineering & Heavy

Industries Ltd.

Ship Name: Hanjin Zenoa

Ship Type: Containership

Halla Engineering & Heavy

Industries Ltd. has delivered Hanjin

Zenoa, the third in a series of 2,500-

TEU containerships. The double skin vessel measures 210.5 x 32.3 m, with a 1.9 space between steel skins. The 30,280-gt vessel is powered by a

Hyundai B&W 8K80MC-C engine which develops 34,040 bhp at 104 rpm and dri- ves a NiAlBr Hyundai-make CP, 7.3-m propeller. The ship has a service speed of 22 knots, and main engine consump- tion is 90.08 tons/day. Hanjin Zenoa is classed by Germanischer Lloyd to GL+ 100AS Container Ship + MC, AUT, 1W.

The ship is equipped to carry 1,100 TEU in the hold (7 tiers, 11 across) and 1,400

TEU on deck (5 tiers, 13 across on

Kvaerner hatches). There are also 215 reefer plugs.

Hanjin Zenoa Main Particulars

Length, o.a.: 210.5 m

Length, b.p.: 190 m

Breadth, Molded: 32.3 m

Width Of Double Skin: 1.9 m

Draft (Design): 11m

Draft (Scantling): 12.2 m

Depth, Molded To Main Deck: 19 m

Gross Tonnage: 30,280 tons

Deadweight 29,800 tons

Deadweight (scantling): 36,100 tons 36 Maritime Reporter/Engineering News