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Re: NavList zone decriptions
From: Gary LaPook
Date: 2011 Mar 20, 11:29 -0700

Lu has it right. The standard meridian for the Pacific time zone is 120° west which divided by 15° per hour makes the Z.D. + 8 so you have to add eight hours to PST to find GMT. When we switch to PDST we move our clocks forward making them read one hour later, one hour closer to GMT, so it now only requires adding seven hours to our clock time to find GMT making the Z.D now + 7. Turn on WWV or go to one of the many time servers and see what GMT is right now and compare it to your clock and you will find a seven hour difference.

http://www.time.gov/timezone.cgi?Pacific/d/-8/java

gl

--- On Sun, 3/20/11, Guy Schwartz <guyschwartz@comcast.net> wrote:

From: Guy Schwartz <guyschwartz@comcast.net>
Subject: [NavList] Re: NavList zone decriptions
To: NavList@fer3.com
Date: Sunday, March 20, 2011, 4:28 AM

Lu:
Here is what you said
"When keeping civil time, time zone designators (eg, time zone "U") are not relevant. What is relevant, though, is our Zone Designator. So, yeah, we on the West Coast of the US just slipped from ZD +8 to ZD +7. But unless we're at sea keeping ship's time, the "U" designator is not relevant"
Your comment confused me because we went from +7 to +8, and according to
what you wrote it contradicted that.
Am I still missing something, shouldn't you say we slipped back to +8?

Guy
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