VESSEL BUILD, REPAIR & MAINTENANCE
The aft peak features numerous tanks used to house both fresh water and ships services such a lubrication and hydraulic oil.
Forward of this the engine room houses the main propulsion machinery which is provided by a MAK 8M20C engine rated at 1060 kW at 900 rpm coupled to a free-standing Mekanord 650HS reversing gearbox with reduction ratio of 6.47:1 which drives the large 3.3 m diameter controllable pitch propeller. A low drag high thrust nozzle is fitted in way of the propeller and incorporates a triple rudder system to provide high turning force. Two Caterpillar C9.3 generator sets are fitted to the port side of the engine room, each delivering 250 ekW of power along with the hydraulic standby pumps and fuel filters. To the starboard side of the engine room the large main switchboard is fitted within a dedicated enclosure along with a small workstation to provide a place for the ships engineer to monitor and record system performance. Forward of the switchboard room the fish hold refrigeration is fitted along with the standby engine cooling pumps. The main engine and generators are cooled via freshwater box coolers. A hydraulically powered stern thruster is fitted aft above the propeller shaft with motor fitted in the engine room.
A large fish room is fitted forward of the engine room with capacity for up to 2,200 stacking fish boxes. Refrigeration was achieved with chilling pipes fitted to the ceiling of the hold as well as below the floor where they were incorporated into the sub
flooring. The fish hold refrigerant is liquid based which poses no danger to life if a leak occurs and can be easily mended onboard. Ice lockers are arranged in the hold and can house up to 10 t of flake ice, in addition a slurry ice mixing tank if fitted to provide premium chilling for certain species.
At the stem of the vessel the fore peak is divided into four compartments with three large freshwater tanks which are used for ice making along with a bow thruster access compartment on the centreline.
Above the main deck the vessel is generally divided along the centreline with working areas to port and accommodation to starboard. To the port side there is a steering gear compartment combined with engineer’s workshop aft, fish handling area amidships and dry locker forward. To the starboard side there is a laundry/pantry/galley aft, followed by a large mess/lounge amidships and four two-man cabins forward. A large 20 m3 hopper is fitted on the centreline.
A deck up features the trawl deck where most of the deck machinery is installed and fishing takes place. The deck features twin ramps aft with hydraulic stern gates fitted to the top of each ramp for crew protection. Forward of these are two flush mounted hopper hatches where the catch is taken on- board. The deck is then open all the way to the stem where three sweep winches are fitted to allow maximum deck length for storing and mending nets. Fitted amidships immediately
above the net tracks are three separate bagging winches. Three split winches are fitted amidships, two to starboard and the third to port and lead directly aft to large trawl blocks which are capable of sliding forward up to 1.2m from the transom to reduce the pressure on the steering gear when towing an edge in deep water. Numerous casings are fitted either side of the tracks and serve various functions such as a gear store, air handling unit room, two-man cabin and unloading trunk.
The shelter deck runs from stern to stem. Aft it is mainly open and provides a walkway around the perimeter of the vessel as well as shelter for those working on the trawl deck. Amidships features a full breadth casing where three two-man cabins are fitted along with an electronics room. Forward is arranged for mooring and anchoring and features a three-barrel winch fitted within a weathertight compartment and is used to stow the two anchor warps along with a spare barrel for mooring rope.
At bridge deck level a large wheelhouse is situated which is nearly the full breadth of the hull to provide great visibility when manoeuvring in restricted areas. Large windows are also fitted aft on the centreline and provide a commanding view of the trawl deck to enhance crew safety.
q +44 (0)1261 833 825 E
info@macduffshipdesign.com H
www.macduffshipdesign.com
March 2021
www.dockyard-mag.com 27
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