This paper addresses model-informed global path planning for vessels, specifically examining methods that use models to determine a vessel's optimal global path. The software support is developed within the ROS2 framework due to the requirements for modularity and communication with external interfaces. The navigational area map constitutes a mathematical model of the environment, generated by processing and integrating features from multiple images into a coherent representation of the geographical space. To convert the features of the shoreline and zones of distance from the shore into geographical coordinates, a principle of creating a local coordinate system on a metric scale was introduced. This principle is also used for data visualization in the RViz2 tool. In addition to data visualization, Rviz2 participates in the process of setting the starting and ending points of the path. Determining these points is a critical factor in the vessel path planning process using the classic D* Lite algorithm to calculate the path on a cost map. The classic D* algorithm, without the vessel dynamics model, is not suitable for planning without adjustments because the path is not smooth and contains sudden changes in direction. Consequently, a path interpolation model was created using a point distribution and curve fitting process. The hypothesis of the work posits that the described methods can be applied to the path planning of real vessels if the task is for general-purpose vessel planning with correctly set space costs and interpolation parameters. This hypothesis is tested on navigational area maps with an explanation of the process of setting space costs and path point sampling.