Design, Modelling and Analysis Tools for Naval Architecture and Ocean Engineering
Forest Apps is a collection of practical software tools and numerical utilities developed for naval architects, ocean engineers, and offshore engineers. The site focuses on engineering-oriented workflows, efficient modelling, and reproducible analysis, supporting both preliminary design and research activities in marine and offshore engineering.
We provide lightweight, engineer-friendly applications covering key analysis tasks commonly encountered in floating offshore structures, marine renewable energy, and ship & offshore system design.The tools are designed to complement commercial software by offering open, inspectable, and extensible implementations suitable for education, research, and early-stage engineering studies.
DP Capability Tool
Evaluate the station-keeping capability of DP vessels under combined wind, wave, and current loads. The tool generates DP capability plots (rose plots) to support operability assessment and to identify limiting environmental conditions. Both feasibility calculations and DP capability analysis are supported for intact conditions and defined failure modes, with built-in utilities aligned with DNVGL-ST-0111 and ABS DP guidelines
DP Rule Utilities
Provide rule-based calculations in accordance with DNV-ST-0111, including environmental loads from wind, current, and waves, as well as key thrust loss effects to generate thrust loss factors and forbidden zones. The tool also computes rudder performance curves, delivering longitudinal and transverse force ratios for accurate DP performance assessment.
Wave Scatter Diagram Tool
The Wave Scatter Diagram Tool generates global wave scatter diagrams in accordance with DNVGL-RP-C205. It uses the DNV-recommended Conditional Modelling Approach (CMA) to estimate sea state occurrence for different navigational zones, supports Weibull and Log-Normal distributions for HS and TZ(Nautic zones, North Atlantic and World Wide trade), allows user-defined bin settings, and enables export of data and figures for direct use in reports.
Quasi-Static Mooring Analysis Tool
QsMoor is a software tool developed for the analysis of mooring systems for floating offshore structures. It calculates the position and tension distribution along each mooring line using standard catenary equations. The program automatically determines the equilibrium state of the moored system and efficiently evaluates the corresponding system stiffness matrices using semi-analytic Jacobian methods.
HydroModeller
Cloud-based panel model and Morison model modelling tool for hydrodynamic analysis of typical floaters.
FreeFloating
Free 3D modeling tool for wave diffraction and radiation analysis, utilizing the open-source solver HAMS.
