Page 37: of Maritime Reporter Magazine (December 1987)

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At the dock of Bollinger Machine and Shipyard, Inc. the latest in the series of "Island" Class patrol craft is being readied for sea trials. The skipper and crew look proudly at one of the finest patrol craft avail- able today. The Island Class is based upon the 110-foot hull design offered by Vosper-Thornycroft, UK, but modified to meet the Coast

Guard's exacting needs and specifi- cations.

These patrol boats see a variety of environments in their daily activity, protecting the coastal waters of the

United States. The Coast Guard and Bollinger selected the HR Se- ries Capac, manufactured by Elec- trocatalytic, Union, N.J., for hull protection because these systems were proven to perform in the broad range of service conditions antici- pated. Operations in warm Gulf, cold Arctic and inland waters dic- tated the use of reliable, stable and long-lived equipment. Coordination of the design and manufacture en- ables Capac to meet the five key demands of effective corrosion pre- vention; sensing, control, power handling, grounding and display.

The silver chloride sensing electrode recognized for its high accuracy, sta- bility and 20 year life is coupled with integrated circuit control. This control detects wiring faults as well as protecting the silver electrode during power off conditions.

Sacrificial anodes that can supply electrical current to the underwater hull and appendages to counteract and suppress corrosion could have been specified for cathodic protec- tion. However, the design specifica- tion required impressed current protection because of its lighter weight and recognized cost advan- tage over sacrificial anodes. The Ca- pac system weighs just 400 pounds and compares in ampere availability to 90 sacrificial anodes which weigh nearly a ton. Both weight and drag are important for this 160-ton, 25- knot craft.

The superior performance of Ca- pac requires a higher initial cost, however, U.S. Government studies have shown that this cost is recov- ered in 3 to 5 years when compared to sacrificial anodes. This economic advantage would represent a 20 per- cent return on investment over the 20-year life of the vessel. Electro- catalytic, manufacturer of electro- chemical systems and products that employ proprietary catalytic tech- nology and provide their users with costs savings compared to alternate technology.

For more information and free lit- erature from Electrocatalytic,

Circle 77 on Reader Service Card

Programmable Safe-Pak Relays which allow optional sensing func- tions such as latching from a mo- mentary closure, inverting switch functions, all programmed into a single unit. Zener Supply and Re- turn Barriers are included which provide passive energy limiting to provide safe DC voltage levels.

Latching Relays are included to provide a momentary start/stop ac- tuation or differential control switching. Many other models are also described.

Approvals include UL, FM, CSA and MSHA, for Class I, II, Division I and II, Group A through G.

For further information and a free copy of the new catalog from Gems,

Circle 48 on Reader Service Card

NCEL Names Ashley

Director, Expeditionary

Facilities Division

New USCG patrol craft employ Electrocatalytic's Capac system for hull protection.

New U.S. Coast Guard Patrol Craft

Employ Electrocatalytic's Capac

System Selected To Arrest Corrosion

In All Natural Waters

By Paul Byrne

Electrocatalytic, Inc. 16-Page Gems Catalog

Features Solid-State

Relays And Barriers

Gems Sensors Division, Plain- ville, Conn., recently published a new 16-page catalog describing solid-state Safe-Pak and Zener Bar- riers that protect instrumentation or equipment in potentially hazard- ous areas.

The units render non-voltage pro- ducing sensors intrinsically-safe.

Used within a system, they provide safe operation in hazardous areas.

To be certified intrinsically safe, a device or circuit must be designed so that no two simultaneous failures can cause an explosion.

Gems relays eliminate the need for costly, explosion-proof housings and prevent power shutdowns. They are designed for use with sensors monitoring flow, pressure or level, or with motor/pump starter switches, proximity switches, on/off switches etc.

Included in the new catalog are:

Joseph L. Ashley

Joseph L. Ashley, a senior me- chanical engineer at the Naval Civil

Engineering Laboratory (NCEL),

Port Hueneme, Calif., has been pro- moted to director of the newly formed Expeditionary Facilities Di- vision in the Amphibious and Ad- vanced Base Department.

In his new position, Mr. Ashley will supervise 11 full-time scientists, engineers, and support personnel.

As NCEL's technical center of expe- ditionary shelter expertise, the new division focuses on research and de- velopment of antarctic facilities and military structures.

For all Marine Fixed Ballast Operations

Densities to 450 + pcf (S.G. 7.2+) • Safe • Quick • Non-Shifting • Pre-mixed installation . Removable

Genstar Stone Products Company

Executive Plaza IV, Hunt Valley, MD 21031 USA (301) 628-4060 Telex No. TRT150154/FACS No. 3016871576

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December, 1987 49

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Maritime Reporter

First published in 1881 Maritime Reporter is the world's largest audited circulation publication serving the global maritime industry.