Geography · The Date Line and Universal Time (UT)
What is Greenwich Mean Time (GMT) historically defined as?
Verified Solution4 OptionsUpdated: October 2026👁️1 View
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- 1The localized time zone used exclusively by European maritime transport
- 2The mean solar time at the Royal Observatory in Greenwich, London, averaged over the year✓
- 3The standard atomic clock time calculated at the International Bureau of Weights and Measures
- 4The exact solar time measured daily at the Equator
Correct answer
The mean solar time at the Royal Observatory in Greenwich, London, averaged over the year
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