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Old 22-11-2015, 13:22   #1
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Noon to Noon As Opposed to Midnight to Midnight?

Is there a way to display tracks this way (noon to noon)?
Thanks
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Old 22-11-2015, 23:59   #2
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Re: noon to noon as opposed to midnight to midnight?

Why exactly do you want this?
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Old 23-11-2015, 00:58   #3
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Re: noon to noon as opposed to midnight to midnight?

Probably because the navigator's day runs from noon to noon? ( Or more commonly 1200 to 1200 these days ).
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Old 23-11-2015, 02:28   #4
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Re: noon to noon as opposed to midnight to midnight?

Never knew there was any other way other than noon to noon

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Old 23-11-2015, 02:32   #5
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Re: noon to noon as opposed to midnight to midnight?

Doesn't local time change along the course of the track?
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Old 23-11-2015, 03:01   #6
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Re: noon to noon as opposed to midnight to midnight?

You use local noon time each day not time zone noon. AFAIK
Edit: much easier if using a sextant!
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Old 23-11-2015, 03:40   #7
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Re: noon to noon as opposed to midnight to midnight?

Unless you work in the oil industry at sea. For some reason, they all want figures and distances based on midnight to midnight.
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Old 23-11-2015, 03:53   #8
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Re: noon to noon as opposed to midnight to midnight?

local or UTC?
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Old 23-11-2015, 03:53   #9
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Re: noon to noon as opposed to midnight to midnight?

My merchant shipping company wants the 08:00 figures.
The noon\noon is afaik a remainder of the days before we had a decent clock, when the noon sight was the best position you good get.
With improved clocks the star sights at dawn would give you a more accurate position, but the noon-noon is still used by some. Even in our official logbook there is still a column for the noon position, distance sailed noon-noon and the difference between pos and estimated pos.
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Old 23-11-2015, 05:48   #10
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Re: noon to noon as opposed to midnight to midnight?

I have always used noon to noon for all reports including engineering as it seemed a much more social time to do it, rather than midnight
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Old 23-11-2015, 11:07   #11
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Re: noon to noon as opposed to midnight to midnight?

Quote:
Originally Posted by boat_alexandra View Post
Doesn't local time change along the course of the track?
Correcto, so when your day runs from 1200 ship's time to 1200 ship's time your day may vary from 23 to 25 hours... depending on how often you have to change the clocks...
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Old 23-11-2015, 11:09   #12
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Re: noon to noon as opposed to midnight to midnight?

noon is always changing from day to day, so it isn't 24 hours apart.
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Old 23-11-2015, 11:12   #13
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Re: noon to noon as opposed to midnight to midnight?

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Unless you work in the oil industry at sea. For some reason, they all want figures and distances based on midnight to midnight.
That would be because its an industry run by the plumbers

Spent some time many years ago on a Mobil (tanker) charter..they had a weird system that made no allowance at all for the varying length of the ship's day... I think they were more interested in the time from notice of readiness to first line to start of discharge....
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Old 23-11-2015, 11:21   #14
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Re: noon to noon as opposed to midnight to midnight?

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noon is always changing from day to day, so it isn't 24 hours apart.
'Noon' changes from day to day even when standing still.

Up until WW2 a few tramping companies were still setting their clocks by the time of 'local apparent noon' which would give bizzare 'days' of 24 hours 13 minutes etc. Thats all long gone now and clocks are simple shifted in 1 hour or 30 minute increments.

I think that even in the 60's Liberia kept very strange 'standard' time ashore....something like 17 minutes behind GMT.
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Old 23-11-2015, 12:37   #15
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Re: noon to noon as opposed to midnight to midnight?

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'Noon' changes from day to day even when standing still.
...

I acknowledge your greatness as a navigator especially when compared to my humble skills so I fearfully approach and regrettably inform you that you have wandered off-course and drifted into unchartered and dangerous waters where shoals and foul tides abound. You have been seduced by false gods and half truths. It behoves you to come about and re-discover the great navigational truths. Do so quickly Honourable Sir lest the dragons consume what remains of your once magnificent skills. Allow me to offer a humble insight so you will once again take your rightful place at the head of the navigators annual booze up.

For the true navigator, noon occurs when the sun reaches it's zenith and has nought else to do with whatever lesser mortals decide and certainly bugga all to do with clocks and calendars and other time keeping methods. While such flooperly amuses the minds of idle boys, it must never come along side the navigator's berth.

So I beseech you to belay and recant and hold fast to the one true track.
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