Page 42: of Maritime Reporter Magazine (September 2000)

COVER STORY: Maritime 2050

Shallow Draft Configuration

Horsepower Speed (knots) 6,000 7 9,000 8.3 12,000 9.4

Deep Draft Configuration

Horsepower Speed (knots) 6,000 9.3 9,000 11.2 12,000 12.7

Main propulsion machinery is designed to consist of electric Z-drive units, one port, one starboard. The steerable units, complete with propeller nozzle, would provide the maneuver- ability need in shallow drafts as well as the propulsive force needed in deepdraft mode. The electric motors are designed to be located in the aft machinery flat above the Z-drive units. In either draft condition, the propellers are above the baseline protected from damage by grounding. This propulsion system combined with the stern hull shape elim- inates the need for flanking rudders.

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Stern view of Hinge-Ship in shallow (left) and deep (right) draft mode.

The Many Modes of Hinge-Ship

Hinge-Ship is designed as a multi-func- tional and convertible vessel, which will help ship owners and operators meet a vari- ety of needs in a safe, efficient and cost- effective manner. The following are details of the vessel types designed to date. m

Dry Bulk Carrier

Each cargo hold has a large hatch with hydraulic operated hatch cov- ers. In deep draft condition, the hatch openings are parallel to baseline and fully accessible for standard loading and unloading elevator equipment.

In shallow draft mode, the inboard hatch coaming is sloped somewhat increasing the clear hatch opening. Loading the vessel in this condition is accomplished using stan- dard grain elevator loading equipment.

Trailer Transport

The general hull design, propulsion and operating advantages are identical to that of the bulk cargo ship. The hold deck and the 'tween deck provide trailer stowage, sepa- rated by watertight transverse bulkheads.

The hold deck has eight rows of trailers.

Each row of trailers is positioned by deck guide rails located between dual tires. The hold deck and tween deck provide trailer stowage, separated by watertight transverse bulkheads. The tween deck has four rows of trailers throughout the cargo area, also separated by watertight transverse bulk- heads.

Trailers are driven (using a special han- dling tractor) on the vessel via the side ramp into the positioning area where each trailer is aligned and backed into one of the rows. 42 Circle 236 on Reader Service Card

Military

As a military transport, the ves- sel is capable of carrying a variety of rolling vessels and offers the advantages of trans-oceanic transportation with shal- low water bow unloading. Beach landings are possible in the shallow draft condition, with side ramps port and starboard for load- ing and unloading. A standard compart- mentized ballast system provides the need- ed trim for beach approach, and subsequent

Maritime Reporter/Engineering News