Map accuracy in a navigation application like OpenCPN is fundamental to ensuring safe and efficient maritime travel. This feature encompasses the precision of chart data, real-time updates, and comprehensive coverage of navigable waters. OpenCPN excels in this area by supporting multiple chart formats including BSB v3 raster charts RNC S57 vector charts ENC and CM93 vector charts with per-cell offset corrections. The inclusion of IHO S52 compliant display for S57 vector charts ensures that mariners receive accurate and standardized visual information crucial for decision-making. Furthermore OpenCPN offers MBTiles chart overlay support which allows users to integrate custom or specialized chart data enhancing the maps' detail and relevance to specific needs. Integrated Chart Downloader simplifies the process of obtaining updated charts ensuring that users have access to the latest navigational data. With various display modes such as North-up Course-up and Chart-up along with moving-map functionality OpenCPN provides flexible viewing options that cater to different navigational preferences and scenarios. The accuracy of these maps directly impacts the safety and efficiency of voyages allowing sailors to navigate confidently even in challenging conditions. By delivering precise and up-to-date chart information OpenCPN empowers users to make informed decisions reducing risks associated with outdated or incorrect map data.

Route planning is an essential component of any navigation system particularly for applications tailored to maritime use such as OpenCPN. This feature involves the ability to create optimize and manage routes taking into account factors like distance time weather conditions and tidal influences. OpenCPN offers robust route planning capabilities starting with basic waypoint navigation which allows users to set specific points along their intended path. Beyond simple point-to-point navigation the application supports advanced functionalities such as true north or magnetic north navigation catering to different navigational requirements and preferences. For more complex journeys OpenCPN includes builtin great-circle routing which calculates the shortest path between two points on the globe ideal for long-distance sailing. Additionally the software provides tide and current prediction and display by location enabling sailors to plan their routes considering these critical environmental factors. Route planning with tidal support further enhances this capability allowing users to optimize their journeys based on predicted water movements. The integration of AIS input with full target tracking and collision alerting adds another layer of safety to route planning by providing real-time information about other vessels in the vicinity. Autopilot output support and networked AIS inputs ensure seamless interaction with onboard systems improving overall navigation efficiency. By offering comprehensive route planning tools OpenCPN not only simplifies the process of preparing for a voyage but also significantly increases safety and operational effectiveness making it an invaluable asset for both recreational and professional mariners.