Page 38: of Maritime Reporter Magazine (September 1992)

P.P. Jet has been supplying wa- ter jets for more than 20 years, and offer units ranging in power from 500 to 4,000 hp. Being utilized in vessels from military crafts to fish- ing boats to ferries, P.P. Jet water jets are constructed of a mixture of glass fiber, kevlar and carbon fiber to make the units corrosion resis- tant and light in weight. All metal parts exposed to the water are made in stainless steel.

Hamilton water jets have been fitted on high-speed craft around the world. CWF Hamilton offers models spanning the power range from 100 to 5,000 kW.

Schottel Werft GmbH is best known for Schottel Rudder Propel- ler and Navigator units. The Rud- der Propeller provides efficient highly maneuverable propulsion popular in coastal and tractor type tugs to 6,000 hp. Navigator units provide self-contained propulsion units for work platforms such as barges. Particularly, Schottel bow thrusters and SPJ Pump Jets have found numerous applications in the passenger vessel market. SPJ Pump

Jets are capable of high static thrust shallow draft and 360-degree ma- neuverability, which make them suitable for main propulsion and thruster applications. With the same system, bow-mounted thruster units can provide additional pro- pulsion or steering in any vector at full thrust. The system requires no additional draft to the basic hull design. Schottel is represented in the U.S. by Marine Propulsion, Inc.

Thrustmaster of Texas, Inc., of- fers outboard propulsion units for ferries, dredges, and various work barges. The Houston company, one of the largest manufacturers of these type hydraulic units, has systems with power ranges between 75-1,000 hp. The self-contained units typi- cally offer 360-degree steering, pro- peller tilt and slow-speed high- thrust propellers.

Kort Propulsion, also represented by Marine Propulsion, Inc., is known for the Kort Knozzle. Kort Propul- sion is also involved in other propul- sion systems, such as Kort PP Jet

High-Speed Jet Pump Systems.

Kort PP provides jet pumps from 200 to 4,000 hp. The Kort PP Jet

Pump is unique in that it is con- structed of special GRP composite, which allows Kort PP to provide the water intake as part of the pump structure molded to fit the hull, eliminating the most critical factor of the pump jet installation. In addition, Kort Propulsion markets the Kort-MPC Two-Pitch Propeller,

Kort-Hiemdal CP systems and Class

S and fully machined propellers.

Rolla SP Propellers of Switzer- land recently added REXPSC90/91- 7 surface-piercing propellers to its extensive product line. The new model features seven blades, a 15- degree cleaver, diameters up to 34- 1/4 inches, pitches from 40 to 46 inches, with standard 31,33, and 36 tooth spline fitting. Rolla reports that the new design allows for greater thrust with a smaller diam- eter, as well as a more compact, less expensive drive system.

The model REXPSC90/91-7 is 38 part of a family of Rolla's advanced steel propellers, the REXP line, that comprise over 100 different geom- etries investment cast in aerospace stainless steels.

The REXPSC90/91-7 have been specifically designed and con- structed for large, extremely ad- vanced surface drives, such as the

Arneson ASD 12, 14 and 16 series.

Bird-Johnson controllable-pitch propellers are featured aboard U.S.

Navy CG-47 Class cruisers in com- bination with Westinghouse reduc- tion gearing and GE LM2500 ma- rine gas turbines.

The propulsion plant is capable of powering the vessel to speeds in excess of 30 knots.

KaMeWa highly skewed control- lable-pitch propellers continue to be a popular choice in the cruise ship industry.

KaMeWa props are featured on

Carnival Cruise Lines' Fantasy

Class ships, as well as the world's largest cruise ship, the 75,000-grt

Monarch of the Seas.

The propulsion plant aboard the

Monarch of the Seas consists of four

SEMT-Pielstick 9 PC20L medium- speed diesels, with a total output of 21,840 kW (29,287 hp) at 475 rpm.

The drive is through two Lohmann + Stolterfoht twin input/single out- put gearboxes.

Long hauls. GPS navigation makes good business sense. m*

If you want to make a profit in the shipping business, you can't afford inefficiency. You can't waste fuel and you can't waste time. That's why the Global

Positioning System is such an important tech- nological advance. In the right hands, its precision and its worldwide availability will put you well ahead of your competition. • One company has consistently pioneered the promise of

GPS—Trimble Navigation. That's why you'll find Trimble GPS on virtually everything that floats, from the most modern container ships to state-of-the-art America's Cup boats. • Which isn't surprising when you consider that no one offers the range of products or the depth of features that

Trimble does. • So give us a call, and we'll show why the people who use Trimble products think of them not as navigation systems but as business machines. '•mi*

Instant alerts. With Trimble's

Galaxy™ system you get the worldwide text messaging powers of Inmarsat-C and

GPS in one compact system.

Automatic distress alerts complete with position, and precisefleet tracking are just two of its benefits.

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COG 156 *MG S0G 006.5KN

CTV 153-MG XTE 00.2NM L

Measure performance.

GPS can measure your speed over the ground to a tenth of a knot, so you can precisely figure the set and drift of even subtle currents. That helps you stay on course and helps you find optimum engine and rudder settings.

The NavGrapnic XL

GPS. A new way to look at navigation.

See your boat move on an image of a real

N0AA chart. Now with a new slim-line design and high- contrast display.

TheAcutis6GPS.A six-channel GPS receiver integrated into its antenna module. Brings GPS to any nav instru- ment that accepts

NMEA-0183.