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| Answer me this?? | Rate Topic |
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| Posted: Fri May 16th, 2008 10:55 pm |
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1st Post |
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scottran 3T WIS 
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I WAS JUST TALKING ABOUT WATCHES AROUND THE CAMPFIRE . One of the people here said they read somewhere that a special timepiece had to be made to keep accurate time while on a ship to be accurate with the waves and such. Maybe one of you Navy guys know.
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| Posted: Sat May 17th, 2008 03:04 am |
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2nd Post |
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Skipdawg 3T WIS 
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scottran wrote: I WAS JUST TALKING ABOUT WATCHES AROUND THE CAMPFIRE . One of the people here said they read somewhere that a special timepiece had to be made to keep accurate time while on a ship to be accurate with the waves and such. Maybe one of you Navy guys know. Being 3ed generation Navy I have heard all of it mostly. I use to send the new guys down to the hanger bay to borrow the pad-eye wrench so we could adjust the pad-eyes on the flight deck. :cool:
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| Posted: Sat May 17th, 2008 10:24 am |
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3rd Post |
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oagaspar Site Founder 
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They may have been talking about the tide/time clocks Scothand6.gif History of the Regional Tide Clocks During the 1990’s, Ocean Clocks had an idea that would enhance the standard time tide clock currently produced by offering a regional time tide clock that would display high water at the major and minor ports of local regions. If you have checked your local tide time tables you will see that the high tide time differ from port to port. There is a time difference from one port to another as the high tide time makes its way around the coastline. In some regions the tidal difference from one port to another can be as much as 6 hours stretching over the length of the state or regional coast. This could be due to many factors such as local land masses, estuaries, currents and ocean basins. The calculation of these time differences will generally not change except under the influence of bad weather. Over the many years that Ocean Clocks has been developing their regional tide clock, they have collected and plotted data from around the world. This data aids in calculating the correct time difference of the high tide related to the port angles situated on the face of the time tide clock. The blue tide hand on the Ocean Clocks time tide clock is designed to track the moon's orbit to approximately predict the tides. The tide time differences between all of the ports have been calculated to predict the high tides before and after the major port in your region. Ocean Clocks localized time tide clock displays high tide, low tide, and the high tide time difference between ports and waterways of a specific coastal region. Once set, our regional time tide clock may be used as a tide timetable or tide chart to observe harbor tide, beach tide, fishing tide, local surf, or for general boating use in that region (periodic adjustment needed).
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| Posted: Sat May 17th, 2008 11:16 am |
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4th Post |
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Skipdawg 3T WIS
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LOL :D yea that is real Oscar but the one Scott is talking about is a Mariner/Sailor inside joke. :cool:
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| Posted: Sat May 17th, 2008 11:27 am |
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5th Post |
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Foster 3T WIS 
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Marine chronometers were gimbaled, which is to say, they were mounted in rings that pivoted to help eliminate the effect of the ship's movement on the clock. Kind of like this Hamilton  The thing about the chronometers was that they were extremely precise. They may not have even been as accurate as today's COSC certified watches, but their deviation from the correct time was always the same. That is to say, if the timepiece ran 5 seconds fast per day, it did it day in and day out. The deviation from the correct time was then accounted for in the ship's navigation calculations.
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| Posted: Sat May 17th, 2008 11:50 am |
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6th Post |
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Skipdawg 3T WIS
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Foster wrote: Marine chronometers were gimbaled, which is to say, they were mounted in rings that pivoted to help eliminate the effect of the ship's movement on the clock. Yea those are nice. So are the Sundial compass pieces. ;) http://www.timetechtalk.com/view_topic.php?id=6799&forum_id=1
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| Posted: Sat May 17th, 2008 12:44 pm |
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7th Post |
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slinky469 3T WIS 
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Skipdawg wrote: scottran wrote:I WAS JUST TALKING ABOUT WATCHES AROUND THE CAMPFIRE . One of the people here said they read somewhere that a special timepiece had to be made to keep accurate time while on a ship to be accurate with the waves and such. Maybe one of you Navy guys know.  oh my that is so funny we used to do the same thing. How about those channel fever shots? or a HT punch? Oh my that brings back memories
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| Posted: Sat May 17th, 2008 01:29 pm |
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8th Post |
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IW 3T WIS 
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pick up a book called "Longitude" by Dava Sobel. Good read; quick and easy. http://www.amazon.com/Longitude-Genius-Greatest-Scientific-Problem/dp/0140258795 Should answer your q's. Marc
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| Posted: Sat May 17th, 2008 04:22 pm |
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9th Post |
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scottran 3T WIS
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Foster wrote: Marine chronometers were gimbaled, which is to say, they were mounted in rings that pivoted to help eliminate the effect of the ship's movement on the clock.Thanks guys! thats what we were trying to remeber. Foster hit the nail on the head.
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| Posted: Sun May 18th, 2008 12:38 am |
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10th Post |
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AntFarm 3T WIS 
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IW wrote: pick up a book called "Longitude" by Dava Sobel. Good read; quick and easy. It is a really good book and as Marc says it does explain it.
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| Posted: Sun May 18th, 2008 04:09 am |
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11th Post |
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Ablejack 3T WIS 
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If I recall, it was Drake that developed the marine chronometer. A big problem was that clocks were regulated by pendulums which obviously would not function aboard. There was a huge reward for the first developer. The spring driven marine chronometer had to be very accurate in order to determine where you were as far as East/West. You take a reading when the sun sets and you know what time the sun sets at greenwich time. You can always tell which how far North/South you are by the stars. Before the chronometer it was dead reckoning for East/West position calculated by an estimated speed over time. /Navy Vet //Recreational sailor  Yikes!
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| Posted: Sun May 18th, 2008 09:24 am |
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12th Post |
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Paxman 3T WIS 
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Ablejack wrote: If I recall, it was Drake that developed the marine chronometer. A big problem was that clocks were regulated by pendulums which obviously would not function aboard. There was a huge reward for the first developer. The spring driven marine chronometer had to be very accurate in order to determine where you were as far as East/West. You take a reading when the sun sets and you know what time the sun sets at greenwich time. You can always tell which how far North/South you are by the stars. Aren't those the trunks Sean connery wore in "Dr. No"? And yes, Dr. No is appropriate. I expect the forum to have troubles today as we receive hit after hit from the lovely ladies looking and longing...
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