We like using everytimezone. Really helpful in planning travel. All watches have the standard minute and hour hands for setting the current time, but a GMT watch has a 24 hour hand, or GMT hand. Pull the crown out to the 2nd position and turn to set the current time and date. This is so we have a base reference for setting our two other times.
And make sure your bezel is in its standard position, with the 24 hour triangle at noon. Triangle to triangle. Next, we need to set our home time using the GMT hand.
Home time is where you would be starting your journey. Pull the crown out to the third position and turn until the GMT hand matches your home 24 hour time on the bezel or dial on some watches. If our current home time is am, we turn the GMT hand until it reaches just past 10 on the bezel. Ten hundred ten hours in 24 hour time. The minute hand will move too and will line up with ten minutes on the dial.
After landing, I want to set my watch for the current East Coast time, which is one hour ahead of St. Simply pull your crown to position two and set the time one hour ahead using the hour and minute hands.
In our case, that would be am. Now we know the current time where we are as well as the time back home in St. I need to know the time in London so I can book the right flight. I figure out that London is five hours ahead of New York, which makes it six hours ahead of St.
The GMT hand on my watch is still set to my home time in St. Louis, so all I have to do to calculate London time is rotate my 24 hour bezel six clicks, or six hours.
The trick with the bezel is that you rotate it in the opposite direction that you might think. To set a time ahead of you, you rotate counter-clockwise.
To set a time behind you, you rotate clockwise. For London being six hours ahead of our home time, we rotate the bezel six clicks counter-clockwise. GMT is rarely this exact moment. More typically, it is a few minutes before or after. Are you having high school math class flashbacks yet? And then came jet airplanes. Suddenly, people were able to cross multiple time zones in a matter of hours. Pilots flying long routes specifically needed to be able to know the time locally and back home.
The iconic airline Pan Am approached Rolex about building a watch to solve for this newfangled need. And in , the GMT-Master was launched as the first timepiece to track two time zones simultaneously.
The way this concept translates mechanically is relatively simple, but effective in its innovation. Jet airplanes changed all that. By , the atomic clock had been invented, and in the US and UK synched their atomic radio time signals into what would become Universal Time Coordinated, or UTC, which effectively replaced that meridian line that passes through the Royal Observatory in Greenwich. The GMT watch is brilliant, not because of its complexity but because of its simple ingenuity.
Because the movement's going train primary series of gears in a conventional watch is made to spin the hour hand around the dial every 12 hours, all that is required to become a GMT tracker is simply a second hour hand geared to run half as fast and an additional hour time scale.
And because the bezel turns, any hour can be set to correspond to the GMT hand, thus instantly tracking a second time zone; utterly genius, incredibly simple. As part of their navigation and communication protocols, pilots always operate on GMT or UTC time, to eliminate any confusion. So those Pan Am pilots would always have their hand set to GMT, no matter what their local time was. But the Rolex, and other watches that followed suit, trickled down to coach class too, as jetset travelers saw the obvious advantage of a two-time zone watch, as well as the image it projected.
Wearing it branded one as a traveler, someone who crossed time meridian lines and explored exotic corners of the world.
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