Page 26: of Maritime Reporter Magazine (February 2004)

:ers to Double Hull Tankers

Regulations specifically state that double hull rebuild- ing is not a major conversion. Therefore the owner's costs are much reduced compared to other conversion processes that increase the cargo volume. Because the added buoyancy exceeds the weight of new steel, the same weight of cargo can be carried at substantially less draft than before rebuild- a clear advantage in draft-limited service.

What about speed loss? Maritrans and Lloyd's

Register have completed extensive hull modeling stud- ies using Computational Fluid Dynamics (CFD) backed up by model basin testing. They have carefully designed fairing pieces for Maritrans' two vessels that hold the speed loss to only about one half knot.

As can be seen in Figure 13. Maritrans and Lloyd's

Register were able to achieve remarkable correlation for the bow wave between model and CFD prediction.

They also made major breakthroughs in resistance pre- diction. a problem for CFD in the past.

More detailed information on Maritrans/Lloyd's CFD work will be presented at the Royal Institute of Naval

Architects forum on double hull design February 25- 26, 2004, in London. Maritrans is working with part- ners overseas to license this tanker rebuild technology for other interested owners.

Circle 9 on Reader Service Card

Figure 1

Maritrans 192- First large vessel double hull rebuild

Figure 2- Barge rebuild method

WE HAVE QUITE A WEIGHTING LIST

If your vessel requires fixed ballast, you shouldn't go to sea without us* -'V h , • VM

PROVEN PROCESS ^ PROVEN SYSTEM

PROVEN COMPANY

FIXED BALLAST MATERIALS

BALLAS'I^TECHNOLOGIES, INC AND INSTALLATION 520-790-2229 FAX: 520-790-2239 WWW.BAU.ASTTECH.COM

It's where you meet with Washington, D.C., not just in it. Come gather in rooms where views of the Washington Monument thrill with their majesty. Then smile as the attendees return triumphant from a tour that took them through the city's treasures without taking them far from the hotel. This is truly a capital Loews Meeting City.

Call 202-484-1000 • Get more details at www.loewshotels.com

MEET WASHINGTON, D.C.,

AT LOEWS L'ENFANT PLAZA HOTEL • 21,000 square feet of meeting space, including 10 flexible function rooms and a glass-enclosed solarium • 5,355-square-foot Grand Ballroom • 370 spacious guestrooms and suites with breathtaking views • Most convenient downtown hotel to Reagan National Airport • Directly above the Metrorail station • Footsteps from the Smithsonian and most national monuments

Circle 210 on Reader Service Card

February 2004

Circle 237 on Reader Service Card 23