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The Astrolabe is an item in the SNES and PC releases of Mario's Time Machine. It was used by Ferdinand Magellan during his voyage on his flagship, the Trinidad, across the world. As standard astrolabes can be unreliable while at sea, Ferdinand used a mariner's astrolabe that could cope with rough waters. At some point during the journey, it is stolen by Bowser, who traveled back in time to add it to his museum. Mario later takes back the astrolabe from the museum and travels back in time to return it. He shows it to the other crewmembers, including Juan Sebastian Del Cano, to find out who it belongs to. Eventually, he confirms that the Astrolabe belongs to Ferdinand, who is panicking about not knowing where to go. Once his Astrolabe is returned to him, he calms down and thanks Mario.