Multiple choice

The invention of the _____in 1735 was a major breakthrough for open ocean navigation.

  1. chronometer

  2. sextant

  3. GPS

  4. compass
Reveal answer Fill a bubble to check yourself
A Correct answer
Explanation

The marine chronometer, invented by John Harrison in the 1730s, allowed sailors to accurately determine longitude at sea by keeping precise time. Other tools like the compass and sextant were invented much earlier, while GPS is a modern satellite-based system.

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