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Popular Marine Event at Anaheim Convention Center, April 7-10,
Features $40 Million of Industry's Newest Trailerable-Size Boats, Gear
and Gadgets

What: The 13th Annual Orange County Boat Show, produced by the
Southern California Marine Association (SCMA) and
presented by the Automobile Club of Southern California,
provides a wide range of the latest recreational water
craft.com for discounts and
promotional offers.
Headquartered in Perth , Western Australia, Orbital stock is traded on the
Australian Stock Exchange (OEC) and, in the United States, on the OTC Bulletin
Board (OBTLY).

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,
Saturday 10 a.

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PERTH, Australia, Orbital Corporation
Limited (OTC Bulletin Board: OBTLY) today announced that Synerject, its 50:50
joint venture with Siemens VDO Automotive Corporation, has completed due
diligence and will acquire BRP US Inc.

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to 6 p.

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Check
http://orangecountyboatshow. With more than 600 member firms, the SCMA is
one of the largest and oldest marine trade associations
in the country.
"Synerject's due diligence has confirmed that Delavan is generating
considerably more business than we indicated to the market back in November.

This category is for sites relating to the complete fabrication and manufacture of airboats.

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to 9 p.

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Rod Houston said the acquisition was
a significant step for Synerject in achieving its long-term growth strategy
and would complement its existing business. Synerject has proven to be a valuable
investment for Orbital and I can see continuing opportunities for growth in
this market sector," said Dr.

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com.

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Sea-Doo's Challenger (TM) 180, a popular 18-foot
recreational runabout that has more on-board space than
most 20-foot boats and comes with a supercharged 185 hp
or an intercooled 215 hp supercharged engine option.m. The newly acquired business will increase Synerject's
revenue by more than 50%, compared to annual revenue of US$42m reported at 30
June 2005, with further identified growth prospects for the immediate future.

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scma. Orbital's principal
operations in Perth, Western Australia, provide a world class facility with
capabilities in design, manufacturing, development and testing of engines and
powertrains unparalleled in the Asia Pacific region.

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Exhibitor
Highlights: Yamaha's WaveRunner VX110(TM) Deluxe, recently named 2005
"Watercraft of the Year" by WaterCraft World Magazine. Synerject supplies engine management systems,
modules and components for the marine, recreational, motorcycle and industrial
markets. is a wholly-owned subsidiary of Bombardier Recreational
Products Inc. Its portfolio of brands and products includes: Ski-
Doo(R) and Lynx(TM) snowmobiles, Sea-Doo(R) watercraft and sport boats,
Johnson(R) and Evinrude (R) outboard engines, direct injection technologies
such as Evinrude E-TEC(R), Bombardier* ATV all -terrain vehicles, Rotax(R)
engines and karts.au

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When: April 7-10, 2005
Hours: Thursday and Friday noon to 9 p.

Public
Information: Southern California Marine Association
888-BOAT-INFO
www.

BRP US Inc.

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Up to 200 exhibitors will showcase family runabouts, ski
and wakeboard boats , fishing boats, high-performance
sport boats, luxury cruisers, pontoons, personal water
craft, unique inflatable and foldable boats from brands
like Bayliner , Larson, Cobalt, Sea-Doo and Yamaha.

Kawasaki's Jet Ski STX(R)-15F, a sleek, three -passenger
sit-down model with a fuel-injected, four-stroke engine
and racing-inspired hull providing precise handling and
awe-inspiring acceleration. It also has a coveted
Three-Star Ultra-Low Emissions rating from the California
Air Resources Board (CARB).

Orbital's Joint Venture Synerject Purchases BRP's Electronic Components Facility

synerject.

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ADVISORY/13th Annual Orange County Boat Show Readies Southland Boaters for Upcoming Summer Season

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There
will also be an array of boating accessories, services
and ski and wakeboard equipment - all spanning 250,000
square feet of floor space at the Anaheim Convention
Center.

More information on Synerject can be found at http://www.

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About
SCMA: The Southern California Marine Association was founded in
1956 for the purpose of promoting, nurturing and
improving the recreational boating business in Southern
California.
The ensuing profit growth will be a significant addition to Orbital's revenue
streams from this part of our business.orbitalcorp.

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Assignment Desks/Maritime Writers
ADVISORY.

Where: Anaheim Convention Center
800 West Katella Avenue
Anaheim, CA 92802

How Much: Cost of admission $10 for adults.com

Orbital's Chief Executive Officer Dr.

Synerject, headquartered in Newport News, Virginia with additional offices
in France was formed in 1997 as a joint venture between Orbital and Siemens
VDO Automotive Corporation. (BRP), a privately-held company and a world leader in the
design, development, manufacturing, distribution and marketing of motorized
recreational vehicles.

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m.com.

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This is an affordable, full-featured watercraft that also
offers the benefits of clean, quiet four-stroke power.

Orbital is an international developer of engine and related technologies,
providing research, design and development services for the world's producers
of powertrains and engine management systems for application in motorcycles ,
marine and recreational vehicles, automobiles and trucks.

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and Sunday 10 a.
The investment by Synerject consists of working capital, principally
receivables and inventory.

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's electronic components facility in
Delavan, Wisconsin, USA with effect from 1st March 2006. Houston.

Sites listed in this category manufacture complete, water ready, boats and not just a part of the boat.

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m. Children 12 and under
attend free when accompanied by an adult. Orbital expects the Delavan business will be
profitable from the date of acquisition, with margins improving substantially
over the medium term. Orbital provides its
customers with leading edge, world class, engineering expertise .
Website: http://www.