Eternal Promise FR36 – Press Release

Designed by the yard with close assistance from Macduff Ship Design.  During the early design phase the Wolfson Unit in Southampton were contracted to complete a case study of three different hull forms. The first hull form was the hull form of the previous vessel which was tested in order to establish a benchmark for hull resistance. The second and third hull forms featured the same main body, but with different variations of the bulbous bow to help identify the best shape to reduce overall resistance. The results from the study indicated a reduction in hull resistance at the two test speeds of 8 and 10 knots for both variants, but with one showing a slight improvement over the other due to the bulbous bow wave interaction with the hull. Given the increased hull size and displacement for the new vessel, this was deemed to be a success. By carrying out CFD analysis for vessel hull forms at the early design stage, it allows the yard to ensure that new designs are always improving and lets the yard test its design concepts and to make sure they work before putting into production.

To further reduce the environmental impact of the ETERNAL PROMISE, the propulsion package was very carefully considered. The vessel features a Masson Marine W6400 gearbox with a 7.446 : 1 reduction, which coupled to the efficient, slow speed Mitsubishi S6R2 engine, results in a slow propeller speed of 181 rpm at full throttle, or around 110 rpm when trawling at typical loadings. Due to the lower propeller speed, a large 2.5 m four bladed skewed Kaplan propeller could be fitted, within modern propeller nozzle, both supplied by Teignbridge propellers UK. The propeller is 15% larger in diameter than the previous vessel and increases theoretical bollard pull by 5%.

The ETERNAL PROMISE also features two IMO Tier III certified engines. The main engine, a Mitsubishi S6R2-T2MPTK-T3 rated at 480 kW @ 1350 rpm, was supplied, and commissioned by Padmos in the Netherlands. Also provided was a dedicated SCR unit and urea/AdBlue system for this engine which allows the engine to meet the new, more stringent emission standards set by the IMO. The SCR unit, though physically large, was able to be fitted into the engine room and had a high noise reduction rating of 35 dBa, reducing the noise levels experienced both inside and on deck by the crew. As well as the main engine, the auxiliary engine which provides main hydraulic and backup electrical power onboard was also certified to IMO Tier III standards, and again features its own SCR unit and urea/AdBlue system. ETERNAL PROMISE is the fourth vessel built by the yard to feature IMO Tier III compliant engines.

The hull of ETERNAL PROMISE is built entirely from steel, apart from the wheelhouse and masts which are aluminium, and features a double chine hull form, curved transom stern and optimised bulbous bow. Below deck, from aft to forward, the vessel features the cabins, engine room, fish hold and a large freshwater tank forward of the collision bulkhead. Whereas above deck across the transom full width is the galley/mess, followed by accommodation and dry locker compartments, open deck space in way of the winches and an enclosed whaleback forward where the scallops are picked and sorted at the end of the conveyors.

A bespoke hydraulic deck machinery package was fabricated by the yard including two heavy duty split winches fitted with Hagglunds compact CA100 motors giving a core pull of 11 t each. Further to this a set of hydraulic tipping doors, outriggers and catch conveyors were fitted to both sides of the vessel, all manufactured in house by the yard. The two large Bopp gilson winches were supplied by J C Hydraulics and a MFB8 landing crane was supplied by Thistle Marine.

Primary hydraulic power is provided by a Tier III Doosan 4AD126 auxiliary engine providing 287 kW of power at 1500 rpm. An electric motor pump set retrieve system is also fitted.

Cooling systems for all engines and hydraulics onboard are served by box coolers supplied by Blokland Non-Ferro.

Electrical power onboard is provided by a Mitsubishi generator set supplied by Macduff Diesels Limited, with a rating of 98 kWe. As a backup a 98 kWe alternator was also fitted to the front end of the auxiliary engine, giving complete redundancy.

The electrical systems onboard were designed and fitted by R.D. Downie who also fabricated the vessels switchboard and control panels for all the pumps and motor starters.  In addition to this R.D. Downie also provided the fire, bilge and gas alarm systems onboard along with the navigation light panel and assisted with the installation of the navigation equipment.

The catch handling system built by the yard and Northeast Fabricators. The fish hold refrigeration system along with ice machine was supplied and fitted by Airo-tech Solutions Ltd and both are fitted in the forward whaleback.

The vessel was fully painted by the yard with International products applied to a comprehensive marine spec.

The high specification navigation package was supplied and fitted onboard by both Woodsons of Aberdeen and Furuno UK.

Hull development, construction drawings and stability information supplied by Macduff Ship Design

Mitsubishi S6R2 main engine supplied by Padmos, Netherlands

Propeller and Nozzle supplied by Teignbridge, UK

Gearbox supplied by Masson Marine, France

Generator set supplied by Macduff Diesels Ltd, UK

Auxiliary engine set supplied by Watermota, UK

Box cooling systems for each engine and the hydraulic circuit supplied by Blokland Non Ferro, Netherlands

Pumps supplied by Azcue Pumps SA, Spain

Deck machinery equipment supplied by the yard

Landing crane supplied by Thistle Marine, UK

Fire doors supplied by B-15 Marine Ltd, UK

Weathertight doors supplied by Winel, Netherlands

Triple rudder system supplied by the yard

Steering gear supplied by Scan Steering APS, Denmark

Wheelhouse windows and portlights supplied by HK Van Wingerden & An BV, Netherlands

Fish handling system and conveyors supplied by the yard.

Refrigeration system and ice machine supplied by Airo-tech Solutions Ltd, UK

Paint system by International, UK

Wheelhouse chairs supplied by Norsap, UK

Oil fuel filter/separator and main engine oil fine filter supplied by CC Jensen, UK

Pressure washers supplied by Grampian Power Clean, UK

Anchors and chain supplied by Fendercare Marine, UK

Switchboard and electrical system supplied and installed by R D Downie Limited, UK