Which navigational product innovation, first mass-produced in Portugal during the Age of Discovery, allowed sailors to accurately determine latitude at sea and revolutionized maritime exploration?

Before GPS and smartphone maps dominated navigation, various physical tools helped travelers find their way across landscapes. These products evolved dramatically based on geography, culture, and available technology. This trivia question tests your knowledge about a critical turning point in navigation product development that revolutionized maritime exploration and global trade routes.

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The marine chronometer
The mariner's astrolabe
The magnetic compass with wind rose
Mercator projection maps