Cartographer: A cartographer is someone who creates maps by gathering and interpreting geographic information. They help navigators by providing accurate maps that aid in plotting routes.
Astrolabe: An astrolabe is an ancient navigational instrument used to determine celestial positions. Navigators relied on astrolabes to navigate using the stars during long voyages.
Compass: A compass is a device that uses Earth's magnetic field to determine direction. It became an essential tool for navigators because it allowed them to maintain their bearings even when landmarks weren't visible.