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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Another source of time information
From: Lu Abel
Date: 2009 Nov 13, 21:52 -0800
From: Lu Abel
Date: 2009 Nov 13, 21:52 -0800
Your PC! The time-of-day display on your PC (from at least XP forward) will synchronize with a "time server" at NIST or other places. For a very long time the Internet has supported something called NTP (Network Time Protocol). It's a way for computers to get highly accurate time across the Internet (including compensating for network delays in doing the synchronization). An accurate sense of time is pretty important for any number of computer applications (imagine, for example, that you deposit some money in your bank and then withdraw part of it -- except that the clock on the computer that handles deposits is off from the one that handles withdrawals, so it looks as if you're withdrawing money before it's available in your account -- whoops!) The time display on your computer automatically syncronizes to a server you specify. Best ones to use (for us in the USA at least) are the ones run by NIST. The toolbar clock in Vista includes a list of time servers, pick a convenient one (I tend to use timeb.nist.gov, only because it's last on the list and so I suspect few choose it). And, oh, I've had trouble with Microsoft's time server. The biggest problem I've observed with "PC Time" is that Vista does not allow you to choose how frequently to synchronize. I believe it's on the order of once only every two weeks. My computer's clock gets fairly far off between synchronizations, so if you're going to set a watch or chronometer before taking sights (or going on a long voyage :-) ), be sure to do a "synchronize now" I just did a synchronization and my computer's clock is showing exactly the same time as my WWVB clock. Sorry, Mac fans I'm not sure if a similar function exists on your machines (but I rather suspect it does). --~--~---------~--~----~------------~-------~--~----~ NavList message boards: www.fer3.com/arc Or post by email to: NavList@fer3.com To , email NavList+@fer3.com -~----------~----~----~----~------~----~------~--~---