Give geographical reason the local time at Greenwich is considered to be the international standard time?
Answers
Answer:
Two parter. First, the local time at Greenwich, UK is NOT the international standard time. The international standard time is UTC or Universal Time Coordinated. UTC is a time standard that is [roughly] the same as GMT, which is a time zone (and it is not necessarily the local time in Greenwich). For example, we are currently under Summer Time (aka Daylight Saving Time) so the local time in Greenwich, UK is UTC+1 (or GMT+1 ). The M in GMT is also important from back when GMT was a standard time, but means much less now as a time zone.
Second is why the clock at the Royal Observatory in Greenwich was long considered to be the “master clock” from which all others were set. For this, we don’t look at since as one might expect; instead we look at economy and politics. Using the time in Greenwich as a standard began during the time of the seafaring British Empire. In order to coordinate the logistical efforts at ports throughout the country, a common time was decided upon (thanks to the astronomers, the Royal Observatory was already being used as a standard for their work). Port masters set their clocks to the common time, shipping companies did as well, and so did ships captains. That last part is important.
As British ships sailed around the world, they still suffered from the logistical headache of changing times and coordinating port schedules. Fortunately, they already had a common time standard: the clock of the Royal Observatory in Greenwich. So the harbor masters in ports around the globe would set their master clocks to Greenwich Time. As the British Empire (and East India Trading Company and her kind) became the forces of political and economic power around the world, the standard ship time of Greenwich followed. As ships sailed to Greenwich they would officially sync shipboard time devices, and enter it into the log as an official update. And as they arrived in ports they would share the current time with the harbour masters, who would (if the ship time was “more currently updated”) update the port’s clocks. Those clocks would be used to update other ships as they came into port, and the cycle continued. For the world of global trade, everything ran on Royal Time.
As the world changed, the name of Royal Time was eventually shifted to Greenwich Time. And since it was based upon the astronomers’ clock at the Royal Observatory, when the sky scientists pointed out that it was a Mean-calculated time (the average time throughout the year when the sun would pass directly over Greenwich was noon) then the name again changed to Greenwich Mean Time. (Which is where I’d venture you got the notion the local time in Greenwich is the master time)
Still more time passed, Summer Time was invented, and GMT became both a standard and a time zone (as opposed to BST - British Summer Time - UTC+1). That ambiguity caused trouble (as well as some political rambling about the British having control over universal time) so a new standard was devised. UTC became the standard for international time in 1961 (established in 1960).
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Answer:
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Explanation:
It is same for a region or country located on the same latitude. However, countries located in different longitudes have different local times. Thus, for an international coordination between countries, the local time at Greenwich (Greenwich Mean Time) in England is considered to be the international standard time.