Robert Allan Ltd. has completed the design of a new
generation of more capable High Endurance Self-righting Search &
Rescue Lifeboats for the Canadian Coast Guard Fleet.This new design was developed from the successful similar vessels
known as the “Severn” Class operated by the Royal National Lifeboat
Institution (RNLI) of the United Kingdom. The new Canadian design is
larger with a greater range than the RNLI vessel and has been
specifically designed to handle the worst weather encountered year
around in the waters off Newfoundland and Nova Scotia. The new design is also for construction in aluminium rather than FRP as are the Severn
Class. Construction of 10 vessels of this Class is being considered by
the Coast Guard to replace existing Arun Class vessels, which are
reaching the end of their service life. The High Endurance Search and
Rescue Lifeboats will provide greatly enhanced speed, range and weather
operability to the Coast Guard enhancing their capability to perform
Search and Rescue Missions.This is the fifth new design Robert Allan Ltd. has completed for the
Canadian Coast Guard since 2010. Two different designs of new Inshore
Science vessels and new Pollution Response vessels have already been
delivered and placed in service. In total, 33 new vessels of these
designs have already joined the Coast Guard fleet.In addition, the design of the three new Offshore Fisheries Science
Vessels (OFSV) was developed and delivered under a Joint Venture
relationship between Robert Allan Ltd. and Alion Science &
Technology of Alexandria VA and Ottawa. These latter vessels will be the first new ships built under the National Shipbuilding Procurement
Strategy and will be constructed by Seaspan Shipyards in North
Vancouver.The new Search & Rescue Lifeboats are self-righting and capable
of safe operation in extreme weather up to Beaufort Force 12 conditions
and are able to survive in 12 meter seas.The vessel’s particulars are as follows:Length overall:- 19.0 metresLength DWL:- 17.5 metresBeam, moulded:- 6.3 metresDepth, moulded, at midship:- 2.58 metresHull draft, nominal:- 1.67 metresPower:- 2,400 kWSpeed: – 23.5 ktsThe hull has a central skeg, and aft propeller tunnels, developing
into flared, knuckled bow sections with double spray chines forward. The vessel is fitted with an elevated stern deck for towing operations,
reduced freeboard amidships for recovering survivors from the water, and generous amounts of sheer and camber forward.A large well-appointed enclosed bridge amidships provides maximum
visibility and protection for the crew and enables the vessel to
self-right in all loading conditions. A survivor space is located
forward below decks, and the machinery space is aft. A bow thruster is
fitted forward for enhanced manoeuvrability.Normal vessel complement is a crew of four. Seating is provided for
an additional two supernumeraries such as medical personnel, two
survivors (on stretchers) and up to twelve survivors (seated). In
support of the vessel’s secondary missions including Aids to Navigation, Environmental Response, Maritime Security, DFO Science, DFO Fisheries
and Aquaculture Management and other Government Activities the vessel
will occasionally be used to transport up to sixteen (16)
supernumeraries in addition to the vessel’s crew.The vessel has been designed to meet or exceed all requirements of
Lloyds Register Rules and Regulations for the Classification of Special
Service Craft, July 2012 for compliance with the following Notations: 100A1 SSC, MONO, HSC, G3, PMRDescriptive Notes: Coast Guard Service, Rescue CraftStructure designed to G6 Service Area notation (unrestricted service)
Robert Allan Ltd. utilized extensive finite element analysis of the
hull and deckhouse structure in order to minimize aluminum weight to the maximum extent possible to achieve the vessel’s performance objectives. Extensive computational fluid dynamics (CFD) simulations were also
conducted to model and demonstrate the vessel performance for the Coast
Guard prior to construction. These studies included optimizing vessel
resistance with the use of interceptors and propulsion studies including cavitation and assessments of sea keeping performance.Typical of all Robert Allan Ltd. designs, significant noise and
vibration reduction measures have been implemented throughout, including resiliently mounted main engines, gearboxes, exhaust silencer systems,
ventilation intake air silencers, sound dampening deck treatments, and
insulation measures.
SHIPBUILDING
15 July 2013 - 20:28
Canada: Robert Allan Finalises New Design of Search & Rescue Lifeboats
Robert Allan Ltd. has completed the design of a new generation of more capable High Endurance Self-righting Search & Rescue Lifeboats for the Coast Guard Fleet.
SHIPBUILDING
15 July 2013 - 20:28
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