Office of Naval Research - National Transportation Library

Figure 22 - Austal JHSVSource: Austal website, http://www.austal.com/index.Military Multi-Hull High-Speed Trailership (HSTT-180) is another potential vessel for SSSnot yet proven feasible for commercial domestic operations. The HSTT-180 is a vesselintended for dual-use with a dual powering arrangement for two service speeds and modifiedmilitary configuration that includes a spare deck over the top cargo deck for additional cargoarea for light weight materiel. Its principal characteristics are: 181 meters in length, 32meters beam, and 8 meters draft; commercial deadweight of 2,000 tons, and cargo area of2,680 square meters. 53 The Center for the Commercial Deployment of TransportationTechnologies (CCDoTT) is conducting research for ONR on HSTT-180. The HSTT-180power plant consists of four marine diesel engines with a total power of 32,000 KW (43,000hp) installed in the center and wing hulls and two gas turbines of 36,000 KW (48,000 hp)both installed in the center hull. The designers identify service speeds of 26 knots using thethree diesel engines and 40 knots using all four engines. The HSTT designers have identified40 knots as a service speed in both military and commercial modes of operation.Cost comparisons of the High Speed Trimaran Trailership HSTT-180 vis-à-vis traditionaltug-barge in studies conducted by CCDoTT were conducted for the U.S. west coast SSSservices on several routes of various lengths. For the large 27-knot RoRo container ship,they found that a Los Angeles -to-San Francisco service would cost $1,341 to $1,783 percontainer compared with an average truck cost of $950 paid by shippers ($2.78/mile). Thestudy estimated that the largest contributors to the total cost (accounting for approximately80 percent of the total per trailer cost) were the fuel, drayage, and stevedoring components ofcosts associated with handling containers twice in port. 54 Herbert Engineering and SAICinvestigated the economics of container shipments on the Trimaran Trailership HSTT-180and found that the freight rate per mile ranged between $2.75 and $3.85 per trailer-equivalenthighway mile), based on the assumption of a 26-knot service speed from four diesel engines(32 MW). 55 Figure 23 shows Incat HSV (Swift), 627 deadweight tons, 98 meters long, 27meters in breadth, 3.4 meters draft.53 Vom Saal et al, Dual-Use Short Sea Shipping Trimaran Trailership HSTT-180”, Marine Technology, v. 42,number 3, July 2005.54 CCDoTT, “Operational Development of Short Sea Shipping to Serve the Pacific Coast”, CooperativeAgreement No. N00014-04-2-0003, Agile Port and High Speed Ship Technologies, July 2008.55 Vom Saal et al, Marine Technology, July 2005.ONR SSS Final Report 47