Page 18: of Maritime Reporter Magazine (November 1991)

Finnish Yard Delivers

Hamilton Jet-Powered

Helsinki Police Craft

The Helsinki Police recently com- missioned a newly designed and built 8-meter high-speed all-aluminum patrol boat that features Hamilton

Jet propulsion equipment.

Designed by Juha Snell Oy of

Finland and built by Kellokoski,

Finland, the Ville is powered by a single Hamilton model 271 waterjet propulsion system driven by a Volvo

TAMD 61A marine diesel engine.

At the engine's maximum rated speed of 2,800 rpm, the Hamilton

Jet can push the 3.5 ton laden craft to a top speed of 32 knots. An eco- nomical cruising speed of 25 knots is achieved at 2,500 rpm.

While the integral intake screen on the jet is largely self-cleaning at

MarAd Enters Into $2 Million Agreement

For CHCP With 4 Lines

The Maritime Administration (MarAd) has entered into a $2,000,000 cost-shared cooperative agreement for the Cargo Handling

Cooperative Program (CHCP) with

American President Lines, Ltd.,

Crowley Maritime Corporation,

Matson Terminals, Inc., and Sea-

Land Service, Inc. The purpose of the CHCP is to jointly address and planing speeds, an MPM 1:1 gear- box was installed in the drivetrain to enable the jet to be back-flushed to remove debris such as ice pieces which may become trapped during the many hours of loiter speed pa- trol work the craft will carry out.

Hamilton's HSRC servo-hydrau- lic follow-up reverse control system, which synchronizes the reverse con- troller setting at the helm with the waterjet's twin duct reverse deflec- tor position, makes fine maneuver- ing possible. For close quarters work, such as boarding operations, the engine is set to fast idle and the helm is used to rotate the craft and the reverse controller is used for ahead, astern or zero speed move- ment; precise positioning is achiev- able in all conditions.

For free literature detailing

Hamilton Jet waterjet propulsion equipment,

Circle 144 on Reader Service Card promote innovations in maritime cargo handling through the identifi- cation, development and application of new technology.

Continuing a program begun in 1983, the agreement covers a new five-year period. Program costs will be equally shared on an annual ba- sis by MarAd and the industry mem- bers, subject to the availability of funds. Through cost-sharing, all

CHCP members share in the results of projects, developed and carried out by the industry members, that probably would not be done by any one company.

Unique Spillstop—

Advanced Oil Spill

Avoidance System

An American underpressure sys- tem called Spillstop is an advanced spill avoidance system for oil tank- ers. It employs slight, continuous, and pre-existing underpressure in a medium of inert gas of the ullage space of a ship's tank. Spillstop responds immediately in the event of an accidental hull rupture, ac- cording to MH Systems, Inc., which offers the system. From this baseline underpressure, timely reaction of the system is crucial.

Other underpressure systems on the market perform quite the oppo- site from Spillstop. No underpressure initially exists. These systems only begin to create underpressure with pumps after a rupture of the tanker's hull.

In the Spillstop system, the maxi- mum underpressure is never allowed to exceed the structural capability of any tanker. Older tanker struc- tures are thoroughly inspected, tested and analyzed prior to system installation. A comprehensive analysis by Dr. A. Mansour, profes- sor of naval architecture and ocean engineering at the University of

Cal lifornia, Berkley, and a noted ex- pert in the field of structural analy- sis, has shown that, "effects of nega- tive pressure on tanker structure" are insignificant.

According to California-based MH

Systems, the Spillstop system main- tains the IMO Inert Gas require- ment as all times, even at the time of rupture. The Inert Gas system is a mandatory requirement for all tank- ers in excess of 20,000 tons in order to prevent accidental combustion and explosion.

The Spillstop system maintains the inert gas mixture under nega- tive pressure. A general misconcep- tion is that an inert gas mixture cannot be effectively maintained under negative pressure. Not only can the mixture be maintained in- ert, claims MH Systems, but its ef- fectivity is insensitive to variations in pressures. It is irrelevant to pre- vention of combustion or explosion whether the inert gas mixture is at a positive pressure or a negative pressure. Spillstop continuously compensates for ingress of oxygen due to leakage by introducing addi- tional inert gas—the procedure that is currently followed in the positive pressure system for maintaining a specified inert gas mixture ratio.

Spillstop is computer controlled and totally automated with mini- mal need for human intervention.

The system can be considered both a wholly new physical formulation and a new high tech implementation of the existing inert gas systems that are already in place in oil tankers.

MH Systems reports that

Spillstop eliminates potential boil- off of the volatile cargo by maintain- ing the underpressure value less than the cargo's vapor pressure.

For free literature detailing

Spillstop,

Circle 140 on Reader Service Card

Thrustmaster Of Texas, Inc.

T T

L.

Barge & Dredge

Propulsion Units 50 to 1000 H.P. 12227-K FM 529

Houston, Texas 77041

Phone: 713/937-6295

Circle 323 on Reader Service Card

Welded Aluminum Construction

OUR EXPERIENCE IS YOUR

ADVANTAGE

We offer engineering services, ap plication recommendations and custom design. Our plating and framing schedules exceed all existing standards.

IT IS NO LONGER NECESSARY

FOR VESSEL OPERATORS

TO COMPROMISE THEIR

OPERATIONS WITH

MAKE-DO PATROL

BOATS.

CALL US FOR COM

PLETE DETAILS AND

SPECIFICATIONS.

STOCK MODELS 22' to 50' 37 BRANSFORD STREET, PATCHOGUE, NEW YORK 11772

PHONE: 516-289-0621

November, 1991 Circle 346 on Reader Service Card Circle 252 on Reader Service Card

Kvichak's Fast Response

Towards Oil Recovery.

Kvichak Marine's innovative work in aluminum boatbuilding over the past ten years has made a significant impact in the oil recovery industry. Carefully designed and built with pride, the quality and performance of Kvichak's oil response fleet is outstanding.

Call us with your response vessel requirements or see us at the Workboat Show in New Orleans at booth #1253. 615 N. 34 th. „ Seattle, WA 98103 mChak (206)545-8485

Marine Industries, Inc. Fax: (206) 545-3504