The Tetra Trade Map and the Navigational Chart are identical objects in Metroid Prime Hunters. They are both located in the Meditation Room in the Celestial Archives. The Trade Map shows the old shipping routes of Alimbic exports, while the Chart displays the Tetra Galaxy. Both of these modules are identical, however. The Navigational Chart is found against a wall in the first corridor of the Meditation Room, which Samus passes through as she enters it. The Tetra Trade Map is found inside the main part of the room, against another wall at the base of the platform Samus jumps off of.
Tetra Trade Map
Schematic of Alimbic interstellar shipping routes.