What does GMT time mean?

Answer 1

It means Greenwich mean time (England) Basically where time zones start

Answer 2

It stands for Greenwich Mean Time.

There was no "proper" time nor any way to accurately measure it. This made navigation on the seas inaccurate, sometimes dangerously so.

Attempts were made to measure time accurately and try and standardise it. More accurate clocks were made, but there was still the problem of knowing that two hours might have gone by on the clock, but what time should it be - 11:37, 11:38, 2:15???

Generally, people just lived by when it was light, but something "Universal" was needed, so the Royal Astronomical Observary in Greenwich (England) was given the job of "standardising" time, so English ships would be able to navigate more accurately han anyone else.

They made many observations and found the average - The "mean" average time. This became the time by which all other clocks were set. This time was called Greenwich Mean Time".

Travelling East or West, you gain or loose time, so the planet was divided into 24 roughly equal "segments", each one representing a one hour difference. These are now known as the "World Time Zones". They are all calculated from the line of zero degrees Longditude. Greenwich made the original observations, so zero degrees Longditude was placed over Greenwich and all world times and navigation calculated from that. The line became known as the "Greenwich Meridian".

The Royal Observatory has now moved, but the imaginary line of zero degrees remains.

Other countries, particualry the US prefer to use "UTC" (Universal Time Constant), which is currently the same as GMT. The difference is that GMT may be changed by politicians, who decide to add extra "Daylight Savings Time" as is felt beneficial for the UK, but UTC will always remain the same - Literally, a constant.

I hope that helps a little?!

Answer 3

It means Greenwich Mean Time, which is based on the Greenwich Meridian at a location in England. All other time zones are referenced to the GMT. It was originally used by the British Navy to determine Longitude, according to Wikipedia Encyclopedia

Answer 4

GMT literally means Greenwich Mean Time. It refers to Greenwich (pronounced "grenich" with short vowels), United Kingdom, very near London.

Greenwich Mean Time was used as the first point of longitude, and the line for this latitude is called the Prime Meridian. The Prime Meridian is 0º longitude and all other longitudes are either east or west.

Answer 5

Greenwich Mean Time -GMT- (Royal Observatory,Greenwich,England) ... Alternatively, Coordinated Universal Time -UTC- (National Institute Of Standards And Technology, Fort Collins,Colorado), and Zulu Time in the military

Answer 6

GMT is Greenwich Mean Time. It is the time zone at zero longitude. All other time zones are expressed in relation to GMT.

Answer 7

GMT mean Greenwich Meridian Time.


Longitude (shown as a vertical line) is the angular distance, in degrees, minutes, and seconds, of a point east or west of the Prime (Greenwich) Meridian. Lines of longitude are often referred to as meridians

Answer 8

Geenwich Mean Time

Answer 9

Greenwich Mean Time...it's a village just outside of London England.

Answer 10

Geenwich Mean Time

Answer 11

Greenwich Mean Time... 0 degrees longitute passes through Greenwich, England, and all time zones are based off of Greenwich Mean Time...