Eastern Shipbuilding Group, Inc. delivered the DNV classed factory processor fishing trawler F/T Araho (Hull 175) on January 28, 2017 to the O’Hara Corporation of Rockland, Maine. She is the first U.S. flag freezer processor factory trawler constructed in over 25 years. The F/T Araho will be in service in the waters of Alaska.
The O’Hara family and Eastern Shipbuilding are no strangers to each other. The F/T Araho is the sixth fishing vessel Eastern has built for the O’Hara family over the last 20 years. This factory processor fishing trawler is far more sophisticated than the prior five vessels. The O’Hara and D’Isernia families go back to the early 1990s with the F/V Enterprise a Catcher Processor Conversion delivered in 1996. Between the years 2002-2005 four additional fishing vessels were delivered.
The O'Hara family has been in the maritime industry for over a century. The O’Hara fishing family has grown over the past century. In 1978, Eastern Fisheries was created through a partnership between Frank O’Hara Sr. and Roy Enoksen. Today, Eastern Fisheries is one of the world’s largest scallop fleets and processes over 20 percent of the scallops consumed in the U.S. Moving from generation to generation with fishing fleet operations on both the Atlantic and Pacific Oceans, in addition, O’Hara Corporation operates three catcher-processor vessels in the Bering Sea, Aleutian Islands and Gulf of Alaska
Launched July 31, 2015, the F/T Araho is a ST-115 design Norwegian naval architect Skipsteknisk As. The design dimensions and capacities are as follows:
Length (LOA): 194’-0” (59.13m)
Length (BP): 170’-0” (51.82m)
Beam: 49’-0” (14.94m)
Depth (to main deck): 19’-4” (5.90m)
Depth (to trawl deck): 28’-3” (8.61m)
Depth (to 1st deck): 36’-7” (11.15m)
Fuel Oil: 116,000 USG (440 m3)
Potable Fresh Water: 10,500 USG (40 m3)
Technical Fresh Water: (forepeak)18,500 USG (70 m3)
Freezer Cargo Hold: 38,500 ft3 (1100 m3)
Carton-store Upper Cargo Hold: 5,000 ft3 (140 m3)
Lube Oil Storage Tank: 4,000 USG (15 m3)
The construction Classification Rules and Regulations are Det Norske Veritas
(DNV) +1A1, Stern Trawler, E0 Notation for hull and DNV ICE 1B designed, outfitted and inspected for harsh cold
The accommodation and interior outfitting is designed for 54 persons, excluding the hospital and completely insulated for the harsh working environment. Marine Interior Systems is Eastern Shipbuilding’s selected joiner and insulation subcontractor for the vessel.
The vessel design has an efficient hull shape which reduces hull resistance and increasing fuel efficiency.
The vessel will have the latest in EPA emission Tier 3 diesel engine certification. The vessel is powered by one EMD 16-710G7-Tier 3 diesel engine rated at 4,000 HP at 900 RPM provided by Valley Power Systems, Inc. of Seattle, WA. The propulsion vertical offset Lufkin reduction gear model VSQ4134HG-K-PTO with a 7.20:1 reduction is Owner supplied. While underway the Lufkin propulsion gear also drives an ABB (ABB) 1,700 kW shaft generator at 1,200 RPM which is variable speed, constant voltage and offers a DNV approved floating frequency ranging from 50-60 Hz. This generator provides the vessel with a clean primary electrical power source for utilization of the vessels total installed equipment, winches, processing, fish handling systems, pumps and ships services, etc. The electrical and automation systems are designed by Ockerman Automation Consulting, Inc.
Secondary electrical power is provided by two 550kW Caterpillar (CAT) C18 Tier 3 generator sets and emergency power is provided by one 95kW Caterpillar C4.4 Tier 3 emergency generator all are rated for 60 Hz, at 480 vac. These diesel engines comply with the current EPA/MARPOL control of emissions of nitrogen oxides from marine diesel engines. The vessel is also outfitted with a Brunvoll 350kW electric tunnel bow thruster.
The vessel’s 14 winches are electrically driven, with the exception of the hydraulic anchor winch, and all are provided by Rapp Hydema, a supplier of winch systems and are designed for regeneration of power.
The vessel is fully equipped with a state of the art and most modern system for bottom and pelagic trawling. The trawl winch system is designed for regeneration of power from the trawl winches using an ABB DC grid solution manufactured by ABB Marine. The ABB primary & redundant incomer rectifier systems are designed to operate with an electrical service of three phase, three wire ungrounded circuits supplied with a nominal in feed voltage of 480 VAC at 50-60 Hz.
The DC link System is designed and constructed to meet the following:
- Regulated DC bus.
- Providing service to both variable and constant loads.
- All electrical components are suitable for voltage and frequency variations in the ships power supply.
- Integral fault clearance & protection scheme.
The ABB supplied system includes the following equipment and infrastructure:
- Liquid Cooled (LC) – Converter & Variable Frequency Drive (VFD) system electrically & mechanically suitable for the application.
- Variable Frequency Drive (VFD) rated (LC) Generator dimensioned for this application.
- All necessary associated auxiliary components, to make a cogent & stand alone local control system with remote capability (remote control integrated by others).
- Integral (LC) braking resistors to protect the DC Link bus (s) from overvoltage.
- Integral auxiliary motor control cabinets for cooling fan, gear box lube oil pump, auxiliary pilots and operators, auxiliary power supplies and integration with Converters, VFD & Motor subsystems.
- Integral Primary & Secondary cooling systems (for each arrangement) with raw water supply by others.
The power conversion and inverter arrangements are designed to work locally and remotely.
In the local mode the control systems operate stand alone. Remote functionality is integrated with unique control and monitoring systems:
•Dedicated OEM control system integrating the motor controls and motors to their intended functionality (Rapp Pentagon system).
•Integrated Alarm, Control and Monitoring System (ICMS)
•Energy Management System (PMS) by DEIF.
Each control system provide all necessary fault handling, control interlocks, safeties and stand alone process controls to provide a complete and cogent system.
The two TWS-22030E/S6 model trawl winches doing a bulk of the work in the fishing operation, each with the pulling capacity of 45 tons and can hold 2,800 meters of 32 mm cable. The trawl winch model is powered by Rapp Marine’s unique gearbox design, with multiple fluid-cooled electric motors installed onto the gearbox. The winches have Electric level winder and lebus shells to ensure correct spooling of the wire. The Trawl winches have reinforced drums to handle Spectra rope as well.
Two GW-4000BE model Gilson winches are included in the winch package. Each Gilson winch can pull up to 32 tons, and all winches except trawl winches are utilizing ABB electric motors.
Two NDD-4500BE model split net drums are situated the Araho as well. Each net drum is capable of holding over 20 cubic meters and have a total pulling capacity of 50 tons per net drum. A third net drum, a ND-4500BE single net drum located on stern has a pull capacity of 32 tons and also holds over 20 cubic meters of net.
Also installed on the Araho are three electric cod end/outhaul winches, capable of pulling 12 tons each and a model SOW-502E/S6 electric net sounding winch, designed to handle 3,700 meters of 11 mm cable and a pull capacity of 3.5 tons. The Two AWW-4000 model hydraulic anchor winches are both outfitted with warping heads, and storage capacity of 330 meters of 40 mm cable and chain. The vessel is also equipped with 5-ton hydraulic capstan located on stern.
Rapp Marine has also supplied a complete control system for the deck machinery, the Pentagon CBus F control and monitoring system controls auto payout, haul back and towing operation of the trawl winches. The system monitors real-time trawl length, speed and tension, and logs all of the data produced. There are 17-inch and 19-inch touch screens and joysticks for local wheel house controls for all aft deck winches. Also there is control station on deck for all winches as well as wireless walk around control system for deck crew.
The main processing equipment, in the enclosed factory will consist of various types of fish heading machines and factory systems, consisting of transport systems, fish grader, storage tanks, weighing graders, weighing system, packing tables, packing machine, automatic horizontal freezer system H1, block elevators, etc. The design intention of the process deck layout and selected equipment for transport and handling is to obtain a system with the largest amount of automation, assisting the employees working in the processing area. This arrangement is designed to achieve very high throughput with minimum fish damage, improve employee efficiency all in a clean and safe work area.
The vessel will be outfitted with three working cranes for various onboard operations. One aft deck crane is dedicated to work during fishing operations. It’s a 360° deck crane with a telescopic boom with a lifting capacity 6,400 pounds and a maximum working radius of 35 feet. One midship deck crane dedicated as off-loading crane for continuous operation in port is a 360o deck crane with a telescopic boom. One forward deck crane is also dedicated for continuous operation during off-loading in port is a 360o deck crane with knuckle boom operated by its own hydraulic power unit.