Welcome to the NavList Message Boards.

NavList:

A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding

Compose Your Message

Message:αβγ
Message:abc
Add Images & Files
    or...
       
    Reply
    Re: Time
    From: Jared Sherman
    Date: 2004 Nov 9, 17:16 -0500

    Doug, when you say "UTC and GMT denotes the same time zone of 0.
    
    One can convert daylight time to GMT and vica-versa without adding the step
    of getting standard time."
    
    Are you or aren't you saying that GMT and UTC are one and the same, and that
    neither one changes in any way for Savings Time? i.e. if NYC is at 15:30PM
    EDT (as it was today) which was also 20:30 GMT today, we are -5 hours from
    GMT today, but next June we would only be -4 hours from GMT?
    
    That's the crux of it, I'm being told that the relation to *GMT* both does
    and does not change as we get DST pulled over our eyes. I'm also being told
    that the relation to GMT does NOT change, it is only UTC that changes.
    
    
    ----- Original Message -----
    From: "Royer, Doug" 
    To: 
    Sent: Tuesday, November 09, 2004 5:00 PM
    Subject: Time
    
    
    11-09-04 20:42:00 UTC
    is the exact same as
    11-09-04 20:42:00 GMT
    
    11-09-04 03:42:00 PM EST
    is the exact same as
    15:42:00  ZT
    
    During standard time(anywhere in the world) the zone time of an area is the
    time at the center of the zone.
    During daylight time(anywhere in the world)the zone time of an area is
    jumped to the next zone center to the EAST of the actual zone time of the
    area.
    
    ex:
    120* 0' 0" W is the center longitude of zd + 8 during standard time. During
    dayligt time the center of that zone is now at 105* 0' 0" W or zd + 7.
    120* lon./15 = 8 hrs.
    105* lon /15 = 7 hrs.
    
    UTC and GMT denotes the same time zone of 0.
    
    One can convert daylight time to GMT and vica-versa without adding the step
    of getting standard time.Just remember the rule that the 1st Sun. of April
    at 00:00:00 zt roll the clock forward 1 hour to the next zone's center
    longitude and the last Sun. of Oct. at 00:00:00 zt roll the clock back 1
    hour to the actual center longitude of the zone in question.
    This is also important when calculating tides in areas.
    
    
    

       
    Reply
    Browse Files

    Drop Files

    NavList

    What is NavList?

    Join NavList

    Name:
    (please, no nicknames or handles)
    Email:
    Do you want to receive all group messages by email?
    Yes No

    You can also join by posting. Your first on-topic post automatically makes you a member.

    Posting Code

    Enter the email address associated with your NavList messages. Your posting code will be emailed to you immediately.
    Email:

    Email Settings

    Posting Code:

    Custom Index

    Subject:
    Author:
    Start date: (yyyymm dd)
    End date: (yyyymm dd)

    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site
    Visit this site