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Dual fuel standby vessels for HKLTL by Cheoy Lee Shipyards

A pair of dual fuel (diesel and LNG) RAstar 4200-DF standby vessels have recently entered service with Hongkong Salvage & Towage (HKST). Built by Cheoy Lee Shipyards, LNG Sentinel I and LNG Sentinel II were specifically designed for service at the Hong Kong LNG Terminal Limited (HKLTL) import terminal. Featuring a unique electrical propulsion system with Z-drives that can receive power from both diesel and dual fuel (diesel and LNG) propulsion gensets, these vessels will help maintain a safety zone around the terminal and assist with berthing of LNG carriers to the jetty. They will also transport personnel plus equipment between Hong Kong and the floating regasification and storage unit (FSRU) and jetty. Their standby duties may include emergency towing of the FSRU, fire-fighting, spill response, and rescue. Three classification societies Working closely with both HKST and Cheoy Lee Shipyards through the design process was key to enabling Robert Allan Ltd. (RAL) to design this vessel pair that are customized for the missions for which they will be tasked. These vessels are notably the 8th and 9th LNG dual fuel tugs completed to five different Robert Allan Ltd. designs, with three classification societies, and for service on three continents, which is illustrative of the company’s unique expertise in the design of workboats incorporating the use of alternative fuels and propulsion technologies for any service, class, or region. Key particulars Length, overall: 42.0 metres Beam, moulded: 16.0 metres Depth, moulded: 6.6 metres Maximum draft (navigational): 6.8 metres Gross tonnage: 1275 tons Capacities Diesel oil: 265 m3 LNG (gross volume): 110 m3 Potable water: 66 m3 Recovered oil: 46 m3 Foam: 18 m3 Dispersant: 12 m3 Complement: 11 crew + 2 supernumeraries Survivors: 20 persons Major machinery 2x Wartsila 8L20DF dual fuel (diesel and LNG) electric propulsion gensets, 1500 ekW each 2x Wartsila 9L20 diesel electric propulsion gensets, 1880 ekW each 1x Caterpillar C4.4 diesel harbour/emergency genset, 82 ekW 2x Wartsila WST-32 fixed pitch Z-drives, 3.3 m diameter, each driven by 3000kW ABB electric motors 1x Schottel STT 60 electrically driven fixed pitch bow thruster, 125 kW 1x Wartsila LNGPac double wall vacuum insulated IMO Type C tank, with integral tank connection space (TCS) and double airlock 1x Palfinger PK65002(M) folding knuckle boom deck crane, 2.8 tonnes at 15.9 metre outreach, and compatible with Dacon Rescue Scoop (RSA 500) personnel overboard recovery system 1x Palfinger rescue boat (RSQ 450) under pivoting davit, SOLAS compliant MacGregor hydraulic deck machinery package featuring: 1x double drum hawser winch with 300 metres of 76 mm synthetic towline per drum 1x single drum towing winch and spooling gear, with 1000 metres of 64mm steel wire 1x towing pin unit aft, 110 tonne safe working load 2x tugger winches, each with 100 metres of 22 mm wire, plus horizontal warping head 2x vertical anchor windlasses with 400 mm throat warping heads 1x powered boom reel, 200 metres capacity of offshore spill recovery boom FFS off-ship fire-fighting system with 2x pumps feeding 2x monitors (each 1,200 m3/hr) plus waterspray Performance Bollard pull: approx. 105 tonnes astern Speed: 14+ knots

50th RAmparts 3200-CL Tug delivered by Cheoy Lee Shipyards Ltd.

With the successful delivery of the M.T. Joymoni to Mongla Port Authority, Bangladesh, Cheoy Lee Shipyards Ltd. has reached a significant milestone. This latest tug is the 50th RAmparts 3200-CL to be completed, and it represents more than a decade of evolution and refinement in tug design.    There are vessels operating for clients such as Svitzer, Boluda, SAAM, PSA, KOTUG, and Ocean Sparkle/Adani. The RAmparts 3200-CL is operating in regions all over the world, including Asia-Pacific, Africa, Europe, the Middle East, and North and South America. Popular RAmparts series The RAmparts 3200-CL was designed by Robert Allan Ltd. in 2008 exclusively for Cheoy Lee Shipyards Ltd., with the first tug, Ocean Pioneer, delivered to Ocean Sparkle in India in 2011. Based on the popular RAmparts series, the hull form was developed to provide a high-performance, multi-function tug in a shallow draft configuration, with a bollard pull of up to 85 tonnes.   Over the years, there have been some significant changes to rules and regulations that have required updates to the design. These include IMO MLC Crew accommodation requirements, supporting structure in way of towing systems, and towing stability criteria, etc. Operators’ preferences The RAmparts 3200-CL design has been kept current and is compliant with all these new standards, and with 50 vessels in service, owners can be confident of the tug’s suitability for many operating scenarios. The carefully developed design has shown its flexibility to suit operators’ preferences. Harbour service, terminal towage, escorting and offshore support can all be performed comfortably by this exceptional tug. All major engine manufacturers, Z-drive suppliers, deck machinery makers, etc. can be fitted, allowing full customisation for every owner’s needs.

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