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ShipWeight is a weight engineering software tool useful for measuring a structure's weight attributes. In the offshore market, estimation, monitoring and tracking of weight and centre of gravity are crucial when designing and building a floating construction. ShipWeight can be used from the early conceptual design work, based on parametric regression of the historical data, and all the way through production until the vessel is used. The owner and developer of ShipWeight, BAS Engineering, is also one of the world's leading NAPA-programming companies. We develop macros, vidgets and managers, and do programming in the NAPA API. Weight estimation software tool for offshore structures In a low-margin market, reduced margins must be met with higher confidence in preliminary weight estimation and better weight control during the construction of the vessel. As the lightship weight is often the most important input for cost estimation, reliable weight estimation is also needed for competitive quotations. Weight estimation and monitoring for offshore floating structures ShipWeight can handle any type of floating structures, including all kinds of ships and offshore platforms. Estimation and monitoring can be done according to selected work breakdown system dividing the vessel into weight groups. The user can determine which groups are relevant for his vessel type. Both the English and the metric system are applied to a project and conversion between the unit systems is also easy. Weight and centre of gravity estimation for floating constructions Based on a statistical approach utilising past ship data, ShipWeight can quickly and efficiently estimate weight and centre of gravity. Regression is automatically executed on a relevant selection of past ship data, standard deviation is calculated for each weight group and successive calculations are used to obtain an uncertainty quantification of the total weight and centre of gravity. Weight tracking and monitoring for floating offshore constructions ShipWeight contains all necessary tools to perform weight tracking and monitoring. Numerous import and export functions are available, linking ShipWeight to all the major design software in the world. Several reports, both standard and custom-made can be produced automatically. As-built weights can be compared to estimated weights and a range of user-defined codes can be tagged to each weight item. Reliable estimations of weight and centre of gravity To maintain and ensure important ship parameters such as deadweight, stability, speed, strength and seakeeping, a reliable estimation of weight and centre of gravity is important. Depending on the vessel type, one or more of these parameters can be crucially influenced by the weight, and a deviation between real and estimated weight can lead to reduced vessel performance. Significant deviation can result in rebuilding and late delivery of the vessel. Weight property analysis for offshore structures In addition to handling both estimation and monitoring in a single integrated system, ShipWeight includes many general weight tasks, such as producing a longitudinal weight distribution curve, gyration values and risk analysis. After completing a vessel, the weight information from the monitoring process is exported to a past ship database and can be utilised when the weight of the next vessel is estimated.