The modern science of Oceanography is dated from the Challenger Expedition.
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Q11: Sailors were able to find longitude at
Q12: The first person to circumnavigate Earth was
Q13: The Scandinavian oceanographer, Fridtjof Nansen, studied the
Q14: John Harrison solved the problem of accurate
Q15: The first information about the oceans was
Q17: A portolano is a harbor finding chart.
Q18: Viking voyages to North America are believed
Q19: Eratosthenes' estimate of Earth's circumference wasn't even
Q20: Benjamin Franklin measured the salt content of
Q21: Keeping accurate time at sea is necessary
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