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Old 03-11-2007
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TIDE TABLES Warning

Today is the first day of Daylight Savings Time, under the new schedule. If you haven't moved your clocks up an hour, you should probably do so now.

However, if you're out sailing, be aware that some sources of tidal information may be an hour off, as they may not have adjusted for the changes in DST.

On-line sources may be accurate, but it doesn't hurt to be careful. The printed tables may also be accurate, depending on how careful the publishers were. The built-in calculations in many GPS units will probably be off by an hour until the old Daylight Savings Time date arrives.

For the computer users out there, Apple, Microsoft and Palm have released patches for the changes in DST. The Apple Mac OS X and Windows patches should be downloaded as a part of the normal software updates. The Palm OS patch for their PDAs is available here.
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Old 03-11-2007
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Good warning. Why can't the world agree when to do DST?

See also http://www.timeanddate.com/worldclock/

Which can be handy at times.
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Old 03-23-2007
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Indies said: Why can't the world agree when to do DST?
It is the US who implemented another change and adding to confusion. My guess (really I have no real data so it is just a guess) is that confusion and additional efford caused by this new change will use more energy than it would save. For example all users must turn on their computers and download the fixes - worldwide, not just US. This alone is a lot of energy loss....
World can not agree on almost nothing. I will not mention any political decistion of CO2 consumtion (that is for other threads) I will just add a simple boating example: where is red and where is green (bouyage systems A and B). And once you are ashore where to drive on left or on the right? and your shore power cable - I saw a lot of different conectors and 110V or 220V to 240 V.. Ohh and your water hose - there are as many fittings on taps as there are countries (almost)... We use metric system in Europe (soundings in m, tankage in l, temperature in C, ...) So why do you thing time would be something to agree upon. I like most thos countries with 1/2 hour difference, not whole hour.
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Old 03-23-2007
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Isn't this the reason that navigators are supposed to stay in UTC and apply local conversions when and as needed only?

It is sadly hilarious to hear Congress telling a triple-shift workforce that we'll all save energy by moving the hands on the clock. So one shift gets an extra hour of daylight and the next two get an extra hour of darkness.

Maybe we need to remove 2/3 of the seats from Congress and force THEM all to work all three shifts as well, to give them a better understanding of the global economy?
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Old 03-23-2007
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The PRINTED Tide and Current Tables are in Standard time. All you need to do is add the one hour DST to the caculated times. Remember when your area is in DST then add the one hour... Otherwise you only need to apply your caculations to your plotting.
Just checked my Nobeltec Tide Tables (on my computer). And they are in Standard time, so I will need to apply the One hour DST corr. to them also.

Have fun and stay afloat!!
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Old 03-23-2007
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Now wait, SD, let me see if I get this straight:

If I were sailing across Illinois, I would run aground, until I hit Indianapollis (where they do not adjust for DST), when I would be ok? MAN, I knew I should have bought a trailerable boat. (Smile)

- CD
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Old 03-24-2007
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Quote:
Originally Posted by tomaz_423
.. So why do you thing time would be something to agree upon.
Probably because measurement of time, apart from DST, its something mankind have largely agreed upon. DST and time zoning remain the last bastion of politicians' ability to muck about with the clocks.
Ignoring China and a few other nations, who beg to differ about which calendar, we managed to stop the politicians from messing with our calendars a while ago. Otherwise the month of George might have one more day than the month of Bill, in the US, leaving the month of Jimmy with only 25. France, of course, might have 13 equal lunar months, all named Jacques, and the British 11 months named after ManU's team members (they paid most for the franchise).
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Old 03-24-2007
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Quote:
Originally Posted by Cruisingdad
Now wait, SD, let me see if I get this straight:

If I were sailing across Illinois, I would run aground, until I hit Indianapollis (where they do not adjust for DST), when I would be ok? MAN, I knew I should have bought a trailerable boat. (Smile)

- CD
Your problem is that a Catalina draws too much water for most of Illinois.. Didn't you read your charts????
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You know what the first rule of sailing is? ...Love. You can learn all the math in the 'verse, but you take
a boat to the sea you don't love, she'll shake you off just as sure as the turning of the worlds. Love keeps
her going when she oughta fall down, tells you she's hurting 'fore she keens. Makes her a home.

—Cpt. Mal Reynolds, Serenity (edited)

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