Page 30: of Maritime Reporter Magazine (June 1994)

R.A. Stearn: Designing Bulk

Self-Unloaders For 40 Years

R.A. Stearn, Inc. (RAS), a divi- self-unloading systems have been sion of John J. McMullen Associ- installed aboard dozens of vessels, ates, Inc., is a designer and engi- including in some of the world's larg- neer of marine dry bulk cargo self- est self-unloader fleets. Specific ex- unloading systems and their ship- amples of RAS's contributions, ac- board integration. RAS-designed cording to the company, include: • The first triangular truss boom unloading system, built of tubular sections with welded joints, was de- signed by RAS. The approach helped save weight and costs. Current RAS boom unloading system designs use high-strength rectangular tubing, to further reduce weight and costs. • RAS pioneered the use of hydrau- lics for boom swing and topping de- vices, resulting in safety and ease- of-handling advances. • RAS was the first design firm to use belt conveyors and bucket-on- belt elevators, drag buckets and pumps to achieve high speed han- dling of portland cement. RAS de- veloped a bulk self-unloader design capable of handling both cement and coal cargoes.

RAS applies its experience gained during more than 40 years of techni- cal innovation and refinement. RAS- designed systems can help provide greater cargo carrying capacities, leading to reduced operating costs.

On all of is bulk self-unloader designs, RAS focuses on helping to provide the lowest system life cycle cost for the required system perfor- mance. To do this, RAS must pro- vide a design which not only mini- mizes construction, operating and maintenance costs, but also maxi- mizing integration of the vessel with shore-side facilities.

The design approach starts with considerations of the economics of a total transportation system and its intermodal components. Such con- sideration includes analysis of op- eration limitations and restrictions, including regulatory body, legal, la- bor and environmental issues. Ship- yard producibility and owner oper- ability are primary considerations throughout the design process.

Stena Line Orders Third

High Speed Ferry From

Finnyards

Stena Line AB recently an- nounced an order for a third high- speed HSS ferry from Finnyards

Oy, and its intention to order a fourth by the end of the year, from a yet to be determined shipyard.

The original order for two HSS fer- ries to Finnyards will be delivered in the spring and at the end of 1995 respectively. The third vessel is set for delivery in the spring of 1996, and the fourth vessel, should it be ordered, will be delivered in early 1997. 7H1H i t i

V' ' X" N X" X / 7> -

Notch Barge Throughbred Topper LOA 550' Clam Shell Self-Unloading Barge

Circle 213 on Reader Service Card

J.W. FISHERS ...where High-Tech dives

Everything for underwater search electronics & video

SSS-100K SIDE SCAN SONAR

A Sonar system with specs matching units twice as expensive.

R0V-REM0TE VEHICLE

An affordable Remotely Operated Video system for the professional dwng industry.

TOV-1 TOWED VIDEO SYSTEM

Ideal lor search missions. Up to 250 ft. cable, 4-lux camera, excellent ahead and look down vision.

DV-1 DROPPED VIDEO SYSTEMS Ok

Topside TV monitoring to 1,000 ftfor wreck divers, salvage, search & rescue.

PROTON 3-MAGNETOMETER PULSE 12-TOWED METAL

DETECTOR

Ultra-sensitive marine magnetometer, vital lor wreck finding. 1,500 + ft. range.

Highly sensitive all-metal pulse detector unit, boat towed, 16 ft. detection range.

PULSE8X

Our top of the line hand held Pulse metal detector, uto & land. 61/2 ft. detection range.

UA-2U/W ALTIMETER

J.W. Fishers manufactures a comprehensive line of highly sophisticated underwater electronics equipment, including metal detectors, side scan sonar and remove video products. Meticulously engineered to meet the growing needs of the dedicated diver. J.W. Fishers dive and search equipment represents the ultimate in u/w performance and value.

Precision altitude control of underwater equipment.

JW FISHERS MFG. INC. 65 ANTHONY STREET

BERKLEY, MA 02779 1 (800) 822-4744

IN MA (508) 822-7330

FAX: (508) 880-8949 OR 822-1931

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A WORK FORCE OF THE FUTURE

The future of the marine industry is at Bollinger's today. Since 1946, the

Bollinger family has demonstrated a commitment to quality and innovation through its responsiveness to an ever-changing offshore marine environment. This commitment has connected us with some of the most respected names in the marine industry. Whether it's a quick repair job or a full scale refit, Bollinger's six specialized repair facilities offer its customers

TRUE TOTAL MARINE SERVICE.

When you next plan repair or main- tenance, or are looking for something brand new, let Bollinger's worldwide reputation for innovative craftsmanship become part of your future.

Bollinger

POST OFFICE BOX 250

LOCKPORT, LOUISIANA 70374-0250

PHONE (504) 532-2554

FAX (504) 532-7225 36 Maritime Reporter/Engineering News