Page 48: of Maritime Reporter Magazine (May 1989)

Mid-Coast Delivers

Cummins-Powered

Crabber-Tender

Mid-Coast Marine recently deliv- ered the 88-foot combination crab- ber-tender Controller Bay, designed for Southeast Alaska. The new Mid-

Coast boat was designed and built for Dick Miller and Dennis

Freed of Seattle. Her length overall is 88 feet 2 inches, beam 25 feet 8 inches and molded depth is 12 feet 4 inches.

The main engine, 800 hp 1,800 rpm, is a Cummins KT 38M with a

Twin Disc MG 530 marine gear at 4.94:1. The intermediate shaft at 4- 1/2 inches diameter and tail shaft at 5 inches diameter are both Aquamet 17 stainless steel running through a

Cooper split-type roller bearing.

West Coast Propeller provided the four-blade 79-inch bronze propel- ler.

The long list of auxiliary equip- ment is headed up by the main aux- iliary generator set, which is a Cum- mins NT 855, 320 hp continuous, fitted with a Lima 175-kw generator on the back end and twin double

Dennison hydraulic pumps on the

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Call or telex Dick Lambert for technical information, brochures or a quotation on a specific model.

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The Cummins-powered combination crab- ber-tender Controller Bay, recently deliv- ered by Mid-Coast Marine of Coos Bay,

Ore. front, driven by a Twin Disc two- pump drive. The number two gener- ator set is a Cummins N855 with a

Lima 100-kw generator and an iden- tical pump set to the #1 generator.

In addition to the large generators, a 30-kw Isuzu light plant was in- stalled. All four engines are cooled by Fernstrum grid coolers and the exhaust is handled by Harco muffl- ers.

The engine room is protected by a manual Halon fire suppression sys- tem with automatic engine and vent fan shutdowns. As for E.R. ventila- tion, a 3,600 CFM tube axial fan does the job of keeping the engine room air fresh and cool. For pumps, the vessel was equipped with two 1- 1/2-inch bilge pumps, one electric, and one engine driven, a 15-gpm positive displacement fuel transfer pump, a crab pot washer pump, and two crane Demming 20 hp 4360-M5

RSW/crab circulation pumps 1,200 gpm each. To cool the seawater for

RSW, PSER Inc. supplied a 40-hp

Carrier refrigeration system with 60 tons capacity, plumbed through a galvanized box-type chiller.

Back outside on the deck, the boat was outfitted with a Slattery

MCK 630 six-ton knuckle/squirt deck crane capable of reaching any point on deck and then some. The anchor winch is a Thompson 3224 fitted with 600 feet of 3/4-inch gal- vanized wire, one shot of 1-inch gal- vanized chain and a 900-pound

Stockless bow roller. Other deck gear included a Marco JO 117 crab pothauler on a Mid-Coast Marine articulated davit and a Hansen king crab pot launcher.

As far as other work going on at

Mid-Coast, the yard is presently pulling plate on a new 72-foot crab- ber for Joe Merino of Westport,

Wash. In addition, the 170-foot lon- gliner Yukon Queen is on the dry-

CONTROLLER BAY

List of Suppliers

Main engine Cummins

Marine gear Twin Disc

Shafts Aquamet

Roller bearing Cooper

Propeller West Coast Propeller

Generators Cummins/Lima

Pumps Dennison

Pump drive Twin Disc

Light plant Isuzu

Grid coolers Fernstrum

Mufflers Harco

Fire System Halon

Refrigeration Carrier

Deck Crane Slattery

Anchor winch Thompson

Crab pothauler Marco

David Mid-Coast Marine

Crab pot launcher Hansen

Circle 181 on Reader Service Card Circle 240 on Reader Service Card 50 Maritime Reporter/Engineering News

Dynascaler

Descaler