What system is primarily used for navigational planning on naval vessels?

The Global Positioning System (GPS) is the primary system used for navigational planning on naval vessels due to its high accuracy and real-time positioning capabilities. GPS utilizes a network of satellites to provide precise location data, allowing naval vessels to determine their exact position anywhere in the world. This technology integrates seamlessly with various navigation systems and assists in route planning, navigating through complex maritime environments, and enhancing overall operational effectiveness.

In addition, GPS enables continuous updates on the vessel's position, which is crucial for making timely navigational decisions, increasing safety during operations, especially in dynamic situations where conditions may quickly change. While other systems have their own merits and can complement GPS, such as the Inertial Navigation System (INS) that relies on algorithms to calculate position based on motion sensors, or traditional methods like celestial navigation and the magnetic compass, none provide the same level of reliability and detail for modern naval operations as GPS.