Page 97: of Maritime Reporter Magazine (June 1989)

PROPULSION

UPDATE

Elliott White Gill Thrusters

Offer Excellent Maneuverability

With Complete Control —Literature Available—

Elliott Turbomachinery Ltd., a subsidiary of the Elliott Turboma- chinery Co. Inc. of Jeannette, Pa., was formed following the parent company's acquisition in 1971 of the marine engineering company J.

Samuel White of Cowes, Isle of

Wight.

Since 1964, J. Samuel White had been developing and manufacturing variations of the Gill Thruster, in- vented in 1921 for river and inland waterways use. Following the devel- opment and installation in 1966 of the first "deepsea" marine unit, the

Elliott White Gill Thruster has since proved itself over many years in numerous and varied shipboard installations, offering unique advan- tages

Elliott White Gill thrusters pro- vide full continuous thrust through 360 degrees to move a vessel in any desired direction, independently of ship speed.

All units fit flush to the hull, thereby avoiding the risk of collision damage or fouling of underwater ob- stacles. Also, the siting of water intakes on the underside of the hull prevents the ingestion of floating debris or intake of air in a heavy sea.

Elliott White Gill bowthrusters may be used as a completely inde- pendent means of propulsion and can be powered by any engine or electric motor of the required capac- ity. All units are manufactured to the BS5750 standard of quality as- surance and consist of an axial flow pump mounted within the hull with only two moving elements—a bronze pump rotor and a cast rotat- able vaned discharge deflector. This proven design ensures long life, trouble-free operation and ease of maintenance.

A simple, electrically driven con-

Point Shipyard in Escatawpa,

Miss.

The 262-1/2-foot vessel, fitted with the Elliott White Gill unit in the bow and twin azimuthing thrusters at the stern, will be equip- ped with a full dynamic positioning system, and is intended for world- wide operation.

For free literature giving full in- formation on Elliott White Gill bow/stern thruster systems,

Circle 14 on Reader Service Card trol system allows directional ma- neuvering from a single control point, eliminating the need to bal- ance control thruster, main engine and rudder simultaneously.

Elliott White Gill thruster sys- tems include many proven advan- tages: positive thrust trainable throughout 360 degrees; freedom from underwater hazards (including grounding); full submergence (even in heavy seas); simplified maneuver- ing independent of rudder and main propulsion (capable of auxiliary propulsion); simple rugged con- struction; versatile applications in- cluding shallow draft vessels; only one wet bearing, requiring no atten- tion; no critical oil seals for possible failure; and no need to reverse gear- ing.

Recent orders include Cable and

Wireless (Marine) Ltd.'s new cable ship Sir Eric Sharp, fitted with

Elliott White Gill bow and stern thrusters Model 50T3, an identical installation to that fitted in the 1984-built sister vessel Pacific

Guardian. The thrusters, operating in conjunction with an advanced dy- namic positioning system, enhance the vessel's maneuvering and posi- tion-keeping capabilities, particu- larly while working cable or using the remote-operated cable-handling submersible. These two units complement the 14 Elliott White

Gill thrusters supplied to or in ser- vice with Cable And Wireless (Ma- rine) Ltd. over the past 20 years.

Also, Elliott Turbomachinery

Ltd. has recently received an order for an Elliott White Gill vertical shaft thruster, type 50T3S, to be fit- ted in the bow of the first of a new class of U.S. Navy Ocean Research

Vessels. The vessel, as yet unnamed, is being constructed by the Trinity

Marine Group at the Halter Moss

PRMMI Appoints Hayes

Port Manager In Baltimore

Puerto Rico Marine Management

Inc. (PRMMI), agent for Navieras de Puerto Rico, recently announced the appointmment of Chris Hayes as port manager in Baltimore.

Mr. Hayes, who began his career in the maritime industry in 1963 with U.S. Lines and then with Sea-

Land, originally joined PRMMI in 1974, playing a key role in the com- pany's development in the Port of

Baltimore. In 1978, he made a ca- reer change and directed the logistic contracts for Saudi Arabia in the building of the largest and most expensive airport in the world, the

King Khaled International Airport.

Prior to rejoining PRMMI, Mr.

Hayes served as project manager for the Maryland Port Administra- tion where he was instrumental in implementing the ACROSS project, an automated port system which interfaces with the U.S. customs au- tomated commercial system.

The R/V Edwin Link, converted from a supply vessel by North American Shipyard, will enable Harbor Branch Oceanographic Institute to conduct research all over the world.

North American Shipyard Delivers

Research Vessel 'Edwin Link'

To Harbor Branch Oceanographic

North American Shipyard, La- rose, La., recently delivered the con- verted research vessel Edwin Link to Harbor Branch Oceanographic

Institute (HBOI) of Fort Pierce,

Fla.

Extensive modifications were re- quired to convert a supply vessel to a submersible support ship up to

HBOI's standards. Rodney E. Lay &

Associates, designer of HBOI's Se- ward Johnson, was selected to de- sign and engineer the conversion. A 168-foot Houma Fabricators hull was selected and work began at

North American.

Labs totaling more than 1,600 square feet were added to the main deck. These include a wet lab with a fume hood room, a dry lab, two refrigerated environmental rooms, a video-film lab with dark room, a mechanical/electrical shop and a di- ver's support air compressor room.

A crew's lounge was also added on the main deck. On the 01 deck, 1,250 square feet of quarters were added to bring the total complement to 30.

Below deck, two former freshwat- er tanks were converted to an auxil- iary machinery room and submersi- ble stores. The ballast tanks were also modified by removing the inter- nal mud tanks to provide scientific stores directly beneath the dry lab.

A marine sanitation device was also added. A mud compressor and die- sel engine were removed to make room for a new 190-kw generator. A new switchboard was installed to parallel the new generator and two existing 75-kw generators. The ex- isting tunnel thruster was removed and a 360-degree steerable thruster was installed for increased maneu- verability while tracking the Johns- on-Sealink submersibles. A Caley

Hydraulics A-Frame rated at 18 tons was installed at HBOI to sup- port the Johnson-Sealink II sub- mersible that will be carried on board.

Additional scientific equipment installed includes a gallows frame, various oceanographic winches, un- contaminated saltwater pumps, and an internal moon pool for submersi- ble communications. These will as- sist scientists in various research projects. With this new vessel, Har- bor Branch has expanded its ability to conduct research all over the world.

For free literature giving full in- formation on the facilities and capa- bilities of North American Ship- yard,

Circle 18 on Reader Service Card

Directional Control

Sea Inlet

Rotor Chest

Thrust

Control Steering

Motor ^ Brake

Input Shaft

Statlo Guide Vanes

Discharge Deflector

Rotatable through 360°

ELLIOTT WHITE QILL ago' Effective Horizontal Thrust

TYPE T3 THRUSTER

June, 1989 101