Page 56: of Maritime Reporter Magazine (March 1997)

PROPULSION UPDATE that the tests showed that pointing the CAP unit at a steering angle of about seven degrees corresponds to a rudder angle of about 30 degrees. For full-scale tests, Motala bought a 41-ft. (12.5-m) tugboat dubbed M/T Veitsi.

During autumn 1995 and winter 1996, the ves- sel was moored in Lake Vattern, the second largest inland lake in Sweden. During this time tests were performed by Bofors

Underwater Systems to determine the charac- teristics of Veitsi with its original rudder arrangement and with the CAP Propulsion sys- tem. Initial results were reportedly favorable.

For more information from Motala Verkstad

Circle 27 on Reader Service Card

B0XC00LER

The WEKA boxcoolers are installed in all types of river and seagoing ships as well as in stationary vessels, dredgers and pontoons.

Due to mounting water pollution hence the increased wear of cooling sytems, a closed circuit cooling system became necessary. The solution was and still is the boxcooler.

The principle is based on the fact, that warm water by its lower density rises, thus causing a thermosiphon circulation.

Weka Copper Nickel boxcoolers have bol- ted connections isolated from hull structure.

WEKACEEIEH

WEKA MARINE BV, The Netherlands

Tel. +31 180-516588, Fax +31 180-516064

THE ONLY BOXCOOLER WITH NATURAL ANTI FOULING

APS Assists In Product Tanker

Conversion

Latvian Shipping Company's 20,000-dwt product tanker Dzintari is shown at the Lisnave shipyard, where it was coated with

Advanced Polymer Sciences' MarineLine tank coatings.

Latvian Shipping Company recently reached a milestone, when it converted 20,000-dwt product tanker M/V Dzintari into a Class 3 chemical tanker. As part of the upgrade, the vessel's cargo tanks and piping were lined with Advanced Polymer

Sciences' (APS) MarineLine high perfor- mance siloxirane coatings. As a require- ment for Class 3 chemical service, APS and

MarineLine, as well as Dzintari, have received full certification by the Maritime

Registrar of Shipping. Dzintari has been upgraded to carry phosphoric acid, which involved the application of MarineLine to a total surface area of approximately 30,000 sq m, including the vessel's 14 cargo tanks and two slop tanks. Dzintari is the second

Latvian Shipping Company vessel to have undergone an application of MarineLine; the first was 28,400-dwt tanker M/V Indra, which had its tanks coated in 1994 to enable operation in methanol trade. MarineLine is mainly comprised of siloxirane, a multi- functional polymer which reacts with a cat- alyst to form a dense, highly cross-linked molecular structure. MarineLine is report- edly resistant to solvents and to 98 percent of all chemicals. This coating has high mechanical strength and is highly resistant to impact, flexural stresses and thermal shocks.

For more information on APS

Circle 47 on Reader Service Card

The hubs are journalled in rigid crossed taper-roller bear- ings for maximum strength and durability. The system can be delivered with or with- out a nozzle.

Two independently moving hub units make up the system and the outer unit is fitted with a pro peller. In this way, the propulsive force can be directed as desired. The possibili- ty to maneuver the CAP unit infinitely in the horizontal plane from 30 degrees starboard via 0 to 30 degrees port is designed to make maneu- vering and steering a ship more efficient and faster. The CAP unit is lubri- cated by oil, under pres- sure from a header tank located above the waterline. The

CAP Propulsion system covers the power range from 200 to 5,000 kW.

Put To The Test

Several model tests were carried out at SSPA

Maritime Consulting in Gothenburg in 1994- 95. The tests reportedly proved the CAP

Propulsion system to be excellent for enhancing maneuverability. The manufacturer reported • Small Hull Penetrations • Power Ranges to 600 HP • Compact Design • Nonpolluting • Low Submergence Requirement • Emergency / Auxiliary Propulsion • Effective Thrust in Current

V^I^V • Serviceable While Afloat

XdSOmniTHRUSTER ^ MARINE MANEUVERING AND PROPULSION SYSTEMS (714) 289-2889 • FAX: (714) 289-2818 743 N. Main Street, Orange, California 92868 U.S.A.

Circle 305 on Reader Service Card 64 Maritime Reporter/Engineering News