Page 41: of Maritime Reporter Magazine (April 1974)

Uses JacuzziJet Propulsion

The new 65-foot workboat shown on trials attained a speed of 26 mph.

A new 65-foot Coast Guard vessel has been developed as a prototype workboat for such navigational work in U.S. harbors as tending buoys.

The craft, built by Alumnaship, Inc. of

Jeanerette, La., is powered by three 12V-71T

Detroit Diesels and JacuzziJet 20YJ propul- sion systems. It is the first of a contemplated fleet of such vessels for the U.S. Coast Guard.

The boat is equipped with a two-ton crane, and has attained a trial speed of 26 mph.

The continuing trend toward water-jet pro- pulsion is a result of extensive military ex- perience with the JacuzziJet, as it has proved itself as a propulsion system which is reliable under difficult conditions. The Jet drives have been used in all types of workboat applications as they have not only demonstrated savings in maintenance, but have provided efficient propulsion, maneuverability and shallow water capabilities.

For additional information, write to Jacuzzi

Bros., Inc., 11511 New Benton Highway, Little

Rock, Ark. 72203.

INDUSTRIAL

TRAINING-PERSONNEL

Marine Operations Overseas

High school graduate with minimum 7 yean work experience in the opera- tion and maintenance of tugs, work boats or other small harbor craft are needed to instruct English-speaking indigenous personnel in the operation and maintenance of this type of equipment.

On-the-job training will be conducted aboard ships transporting work crews, or while in harbor undergoing maintenance and repair.

ARAMCO benefits include: community life similar to any small U.S. com- munity^ supported by hospitals, schools and recreational facilities, PLUS opportunities for personal savings and liberal travel in our all inclusive benefits plan.

Send resume outlining education, work experience and personal history to:

EMPLOYMENT SUPERVISOR

ARABIAN AMERICAN OIL COMPANY 1345 Avenue of the Americas, New York, N.Y. 10019

An Equal Opportunity Employer

Threescore And Ten

And Doing An Excellent Job

The ship model towing tank at the Univer- sity of Michigan is 70 years old this year. It is one of a very few in the world built that long ago and still in use. During its 70 years' history it is conservatively estimated that from 1,500 to 2,000 models were built and tested.

Since 1960, when the tank was extensively modernized, more than 400 models have been tested. Most of this work was done for pri- vate industry and includes hundreds of sea- going and river barges, tugboats, yachts, con- tainerships and tankers. Seakeeping tests of drill rigs, dredges, and tug-barge combinations have been carried out as well.

The tank measures 360 feet in length, 22 feet in width, and 11 feet in depth. Since 1960, when the tank was extensively modernized, more than 400 models have been tested.

The development of large bulbous bows for tankers and 'full-bodied ships was originated at the Michigan tank in 1963. Special skegs for seagoing barges to provide directional sta- bility in hawser tow were developed in this tank. Model tests of the new Delta Queen propelled with a stern paddle wheel were ac- complished at Michigan. It is interesting to note that the actual model paddle wheel used in these experiments was built and tested here in 1910-15.

Models are normally constructed of wood; however, .both glass and wax models have been used. Models up to about 25 feet in length are constructed for resistance and propulsion tests.

This tank, 360 feet long by 22 feet wide by 11 feet deep, is equipped to do resistance, propulsion, seakeeping and maneuvering tests of many types of craft. iDuring its long history, many hundreds of students have been educated and trained in ship model experimentation, as well as being employed on projects in the tank as research assistants. 44 Maritime Reporter/Engineering News