10 WESTERN MARINER January 2010 www.eagleharbour.com ▲ I SLAND S KY BY ROB MORRIS The 328’ loa (322’ lwl) x 88.5’ (breadth extreme) x 15.75’ (summer load draft) ISLAND SKY approaches the BC Ferries terminal at Earl’s Cove, December 2009. The ferry is a double-ender with 3400 tonnes displacement, 4313 grt and 1100 dwt at the summer load draft. PHOTO BY ROB MORRIS BURRARD HEAVY DUTY DECK MACHINERY Burrard Model H7 Anchor Windlass TOWING WINCHES CARGO WINCHES ANCHOR WINDLASSES HYDRAULIC OR MOORING CAPSTANS ELECTRIC DRIVES Congratulations to BC Ferries on the Island Sky BURRARD IRON WORKS LIMITED 220 Alexander Street, Vancouver, B.C. V6A 1C1 Phone: (604) 684-2491 Fax: (604) 684-0458 E-Mail: [email protected]Proud Supplier to BC Ferries’ Island Sky 3681 East 1st Avenue, Vancouver, BC V5M 1C2 Telephone: 604-293-2900 (24 Hours) www.radioholland.ca Thrane & Thrane
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10 WESTERN MARINER January 2010 www.eagleharbour.com
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ISLAND SKYBY ROB MORRIS
The 328’ loa (322’ lwl) x 88.5’ (breadth extreme) x 15.75’ (summer load draft) ISLAND SKY approaches the BC Ferries terminal at Earl’s Cove,December 2009. The ferry is a double-ender with 3400 tonnes displacement, 4313 grt and 1100 dwt at the summer load draft.
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BURRARD HEAVY DUTY DECK MACHINERY
Burrard Model H7 Anchor Windlass
TOWING WINCHES CARGO WINCHESANCHOR WINDLASSES HYDRAULIC ORMOORING CAPSTANS ELECTRIC DRIVES
Congratulations to BC Ferries on the Island Sky
BURRARD IRON WORKS LIMITED220 Alexander Street, Vancouver, B.C. V6A 1C1
3681 East 1st Avenue, Vancouver, BC V5M 1C2 Telephone: 604-293-2900 (24 Hours)
www.radioholland.ca
Thrane & Thrane
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In their new intermediate ro-ro ferryISLAND SKY BC Ferries Services (BCFS)has a ship designed for short voyages
on multiple routes within the BCFS sys-tem. Initially the ISLAND SKY went intoservice in the spring of 2009 on the Earl’sCove/Saltery Bay route on the SunshineCoast where it replaced the QUEEN OF
TSAWWASSEN, retired by BCFS after 48years of service. The ISLAND SKY is thefirst vessel in BCFS’s new ‘Island’ class.
In 2005, after a world-wide competitivetendering process, BCFS pre-qualified 14shipyards and ultimately three of themwere short-listed – Allied Shipbuilders ofNorth Vancouver, Washington Marine Group (WMG;owner of Vancouver Shipyards and Victoria Shipyards),and Remontowa S.A. of Poland. The $45.5 million contractto design, build and guarantee performance of the interme-diate ferry was signed with Vancouver Shipyards on July 62006. BCFS had specific requirements for the ferry. Itwould be an all-steel double-ended ro-ro vehicle/passengerferry with capacity for 125 autos and a design complementof 600 passengers. Fuel efficiency at service speed was a toprequirement. Other BCFS requirements are described withthe photos and general arrangement, following.
Vancouver Shipyards’ design for Hull #167 was model-tested by FORCE Technology in Denmark. The ship-yard’s designers developed a ‘unit assembly’ buildingprocess whereby the entire vessel was divided into 124separate units, or blocks, which were assembled in asequence. This maximised the pre-outfitting of unitsbefore they were incorporated into the vessel assembly.Assembly took place in the WMG’s ‘W’ building in NorthVancouver (see ‘Unit Assembly’ at Vancouver Shipyards:BC Ferries’ New Intermediate-class Ferry in WM, March2007). Victoria Shipyards in Esquimalt BC was subcon-tracted to build the ferry’s 480-tonne superstructure and
Each side of the main car deck has four car lanes or two truck lanes with one car lane(under the gallery deck). BCFS also required port and starboard fixed-ramp single-lane
gallery decks which are suspended from the passenger deck above to keep the main cardeck clear of supporting pillars. Total lane length is 2034 ft (620 m). The gallery decks
can be widened from single to double lane to increase vehicle capacity in the future.
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Being a double-ender the ISLAND SKY’s forward and aft wheelhousecontrol stations mirror each other. Mechtronics Technology ofRichmond BC installed their ‘Megalever’ integrated control sticks inwhich the main engine governor and azimuth thruster controls arecombined (the Mechtronics subsidiary IMPEG supplied the mainengines and Z-drive thrusters; see photos on page 14). The portMegalever controls the forward pair of thrusters (which operate inunison) the starboard lever controls the aft pair. Both pairs areengaged for free-running and manoeuvring into berths. Turned 180degrees, the forward thrusters provide braking power; all four drivesreversed with full throttle will provide emergency ‘crash stop’capability in just over one ship length. Sperry Marine Canadasupplied and integrated the navigation electronics and there is aTransas chart plotter and Raytheon Anschutz autopilot.
Proud Supplier to the Island SkyWESTCOR SERVICES LIMITED
590 Ebury Place, Unit 102, Annacis Business ParkDelta, BC V3M 6K7
Telephone: 604-519-6789 Fax: 604-519-6788
YOUNG & CUNNINGHAM CANADA INC.QUALITY EQUIPMENT FOR THE MARINE INDUSTRY MARINE VALVES, MANIFOLDS, VALVE CONTROL SYSTEMS • ANSI-BS-DIN AND JIS STANDARDS
Young and Cunningham - Marine Valves, Manifolds, Quick-Close valves, Remote operated systemsRepresenting across Canada and the USA Authorized and exclusive distributors for:NRF: Boxcoolers for cooling systems Winteb: Seawater resistant aluminum ventheadsWW Eurovalve: B/fly valves, flanged, wafer, lugged and High performance PresVac: Marine High Velocity tank vents; Kronios: Supplier of potable water management systems “The Concept” PV valvesEconosto: Marine valves and systems for the Marine Industry (DIN)Teekay: Teekay pipe couplings
The design of the single passenger lounge (itsurrounds the snack bar) as one fire zone with two
life-raft muster stations was required by BCFS, thusallowing crew size to be the minimum required byTransport Canada. On the Passenger Deck there isgeneral seating for 319 and seating at tables for 64
with outside seating for 120 on the Crew Deck above.
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in November 2007 in the Esquimalt Graving Dock it wasmated to the 1320-tonne hull which had been towedfrom Vancouver Shipyards (see ISLAND SKY: Island-classFerry Roll-out & Load-out in WM, January 2008).
The ISLAND SKY is designed to meet Lloyd’s Register+100 A1 passenger & vehicle ferry in Strait of Georgia serv-ice + LMC, CCS; Transport Canada MB/CSA regulationsfor Near Coastal 2 operation including SOLAS and IMOrules. The ferry is currently licensed for 450 passengers.
The ‘Island’-class hull form is different from the similarly-sized classes in the BCFS fleet. The ‘V’ section hull and the hydrodynamically shaped thrusterpods combine to reduce resistance. The thrusters were refined after the model tests to have less extension below the pod and, as the ‘Section Lookingto Midship’ illustrates, this gives the thrusters less draft than the hull. Also the thrusters’ support cans, normally round, were modified to both movethe pods/thrusters closer to the centreline (where the thrusters are more efficient) and to make the thrusters interchangeable. The thrusters can alsobe removed while the vessel is afloat. To bottom right in the GA one of the two Liferaft Systems Australia LSA 14M marine evacuation systems (MES)is shown deployed. Each MES has a 14-metre twin-path slide to evacuate passengers into two 100-person self-righting SOLAS ‘B’ life-rafts.
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ISLAND SKY
The combination of the hull form (see the GA on page 13) and the propulsionsystem provide fuel efficiency that exceeds BCFS original requirements. BCFSrequired a service speed of 14.5 knots @ <85% MCR and this speed is beingachieved at ~67% MCR. BCFS also required the 100% redundancy of two separateand independent propulsion systems in two separate engine rooms, one at eachend of the vessel with an installation of two six-cylinder, in-line, four-stroke Niigata6L25HX diesels each delivering 1140 kW (1530 hp) @ 770 rpm to a Niigata ZP-21 Z-Peller azimuthing thruster with 2.265:1 reductiongearboxes for a maximum output speed of 331 rpm (top photos). The Niigata 1900 mm NiBrAl four-blade Kaplan-style propellers turn inKort-type speed nozzles fitted with full-width inside surface stainless steel inserts. There are three Caterpillar 3406C diesels driving CaterpillarSR4 alternators. In the photo (bottom) is the main console in the engine control room from which the ship’s systems and its operation aremonitored. In an emergency two of the ship’s thrusters can be controlled from the console and the ferry would be operated using twothrusters at opposing ends of the ship.
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ABOVE: Approaching the BCFS Saltery Bay terminal, the viewfrom the starboard gallery deck.
LEFT: The ISLAND SKY has a breadth overall of 88.5 ft (27 m) at themain car deck and a 60.5-ft (18.5 m) breadth at load waterline.The ferry was designed for operations on BC Ferries’ shortroutes on most of which the passengers embark/disembark viathe vehicle ramps, however passenger accesses for both theHorseshoe Bay terminal and the Snug Cove, Bowen Islandterminal have been installed on upper decks. �