Page 38: of Maritime Reporter Magazine (September 2012)

38Maritime Reporter & Engineering News VESSELSSeastreak Wall Street Refit CompleteIncat Crowther said the refit of the 43m Catamaran Ferry Seastreak Wall Street was a success and is complete. Seastreak Wall Street was the third of four such ves- sels built by Gladding Hearn, launched in 2003. The vessels were originally fit with four Cummins KTA50 main engines, each producing 1424 kW. The engines drove a quartet of KaMeWa A50 water jets, a package chosen with emphasis onspeed for the Atlantic Highlands to Man- hattan service, delivering speeds in ex- cess of 38 knots and four-engine redundancy. Over time, the operating costs of the four-engine drive train, changes to the vessels? schedules and the age of the main machinery led the opera- tor to request an investigation by Incat Crowther into repowering options, which led to the selection of a pair of MTU16V4000M53 engines for refit. Taking into account the operating pro- file of the vessel, it was decided that in this case Servogear controllable pitch propellers would offer a significant fuel saving at the vessel?s 32 knot operating speed.Incat Crowther provided a comprehen- sive design service, preparing detailed drawings and documentation including revised Coast Guard submissions. The contract to perform the modification was awarded to Midship Marine of Louisiana. The re-fit also included gutting the in- terior, repainting the vessel and fitting the interior with new carpet and toilets. The framed windows were also replaced with direct-glazing. As a result, Sea Streak Wall Street is now 15 tons lighter than originally built. She recently underwent sea trials, recording speeds of 35 knots.At equivalent deadweights, this repre- sents a reduction in top speed of only 3knots, despite a significant reduction in power and half the number of main propulsion engines. Combined with anincreased in passenger capacity, the refit will see per-passenger CO2 emis- sions halved. Length, o.a./w.l 42.9/37.85mBeam, o.a.10.45mDraft (hull) 2.02mDraft (prop) 2.34mDepth 3.4mFuel Oil 2800 gal.Fresh Water 300 gal.Passengers 465Crew 5 Speed (Service/Max) 32/35 knotsMain Engines 2 x MTU 16V4000M53Power 2 x 1840kW ( 2467hp) @ 1800rpm Propulsion 2 x Servogear CPPGenerators 2 x John Deere 6068T MR#9 (34-41):MR Template 9/11/2012 4:24 PM Page 38