1. WAMIT 1.1. Getting Started WAMIT version 7.06 is supported. Specify the folder with wamit.exe in Tools > Preferences. Open and run one of the examples under Help > Examples > WAMIT. 1.2. WAMIT Task The WAMIT task has the same basic components as the other physical engines in SIMA; location environments bodies calculation parameters. In addition, results can be studied as plots and the geometries can be visualized in 3D. Some WAMIT specific settings are also available under Tools > Preferences. 1.2.1. Location Water density, gravitational acceleration and water depth is set under location. 1.2.2. Environments Wave headings and periods can be set under environments. 1.2.3. WAMIT Bodies A WAMIT task can have one or more bodies. For each body the user chooses geometry file, either low order file (gdf) or high order file (ms2). Symmetry flags and characteristic length (ULEN) can be specified by the user. For high order geometries, several options from the WAMIT-RGKernel Interface are included. The most important of these is the possibility to control variables in the geometry file from SIMA. Irregular frequency removal (both using gdf-file and automatic discretization) and trimming of waterline can be controled in the body editor. Other input in the body editor includes: body origin coordinates coordinates of the centre of gravity control surfaces modes of motion to consider in the radiation problem external mass, damping and stiffness matrices. 1.2.4. Calculation Parameters The calculation parameters are separated into two tabs; one for the POTEN module and one for the FORCE module. Options in the POTEN tab includes: Infinite water depth Solve radiation and/or diffraction problem Method for calculation of diffraction potential High or low order method Source strength evaluation Integration of logarithmic singularity Method for solving of the system of equations (iterative, direct or block iterative). In the FORCE tab, the user can specify which hydrodynamic coefficients should be calculated. In addition, there is a possibility to add single field points, or sets of field points. A set of field points is a rectangular box with dimensions, position and resolution. 1.2.5. 3D Graphics The body geometry, field points, sea surface and seabed are visualized in 3D. Whem the body geometry is specifed by a low order gdf-file, SIMA will use this file for visualization. If the geometry is a high order ms2-file, SIMA will run a minimal POTEN calculation in order to obtain a low order representation of the geometry to be used for visualization. 1.2.6. Result Presentation The obtained hydrodynamic coefficients can be inspected using plots and can easily be compared with other hydrodynamic data in SIMA. 1.2.7. WAMIT in Workflows Workflow in SIMA is a powerful tool for combination of SIMA tasks. It is a graphical scripting environment, which looks similar to the post processor. Workflow can be used to run external programs and for automation of complex simulation tasks and result generation. A new workflow node has been implemented as part of the current project. This node allows WAMIT to be run in sequence with SIMO and/or RIFLEX, such that the SIMO (RIFLEX) simulations will be automatically updated with hydrodynamic coefficients from WAMIT. 1.2.8. Hydrodynamic Analysis Report A standardized hydrodynamic analysis report may be generated as part of the WAMIT analysis. Under Model > Calculation Parameters > Report Parameters, the user can choose to generate a report and which results to include in the report. The generated report is found as part of the WAMIT result. WAMIT