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New England |
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Texas |
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New
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Greek |
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New
York Met Topic: Technology Enhanced Navigation April 13, 2004 - Moran’s Restaurant was the site for the NY Met Section’s April meeting. Mr. Allen Hughes of Northrop Grumman’s Sperry Systems discussed his company’s new product, the Vessel Optimization and Safety System (VOSS). Developed in collaboration with Ocean Systems Inc., and Oceanweather Inc., VOSS integrates navigation, passage planning, and real-time monitoring subsystems into a comprehensive ship operation management system. VOSS is a PC-based system that incorporates current weather forecasts and models with detailed ship-specific motion response data to provide the ship operator with a real time method to determine optimum vessel routing. Current weather forecasts and weather data (including satellite data, weather buoy measurements, and ship reports) are input into a proprietary wave model to provide a sea/swell forecast to the ship operator. The forecast is updated daily. This forecast is matched with the appropriate response amplitude operators for the particular ship to determine ship motions for different speeds, headings, and wind/wave conditions. VOSS allows the operator to do route comparisons and optimizations for a variety of parameters including estimated time of arrival and minimum fuel usage without exceeding stress and ship motion limits. VOSS also models powering in wind and waves and compares predicted performance with actual performance parameters obtained via onboard sensors. VOSS can be integrated with the ship’s Voyage Data Recorder. The overall goal is to provide a system that will reduce operating costs and minimize vessel and cargo damage by defining an operating envelope that the ship can operate safely within and which provides an optimal balance between schedule constraints and prudent ship operation. There was a spirited question and answer period after the presentation. Seafarer training requirements were discussed as well as integration of VOSS with other shipboard systems and a description of the weather forecast models associated with the system. The meeting adjourned after Allen Hughes received a token of appreciation from the section.
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Topic:
Large LNG Ship and Design Issues On April 15,2004 about 50 members, guests and students attended the technical meeting of the Greek Section during which Messrs S. Penco and A. Revenga from the European Division (Italy and UK, respectively) of the American Bureau of Shipping (ABS) spoke on the subject of Large LNG Ship and Design Issues “. This was the fifth technical meeting of the Greek Section for the 2003/2004 season and the topic was very timely, since lately there have been many new orders for large LNG ships by Greek and other owners. The well presented topics were: (a) Description of the current LNG carrier containment systems (membrane GTT no 96,Mk III & CS1) and independent IMO type B tanks (spherical Moss & IHI SPB ); (b) The ABS SafeHull program used for the structural design of LNG carriers and of the membrane tanks, based on worst case dynamic loads, including sloshing, fatigue and the IGC Pressure Code; (c) The ABS Dynamic Load Approach and Spectral Fatigue Analysis for LNG carriers; (d) Sloshing analysis and criteria and (e) Alternative propulsion systems (steam turbine, diesel electric with medium-speed dual fuel, slow speed diesel with gas turbine, slow-speed diesel with liquefaction plant).
Before the reception that followed the meeting, Vice President, Michalis Pantazopoulos, presented to the outgoing Chairman, Petros Lalangas, the SNAME Council’s Certificate of Appreciation for his loyalty and in recognition of the accomplishments made during his term of office.
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