Heidi13 Posted July 3 #26 Share Posted July 3 8 hours ago, MBP&O2/O said: We had sights at 0900 ...2 for 3/O and 2 for self. Like you a self designed template which reduced the calculations time to 3 mins. Tried to make it quick as getting up and being semi conscious for 9am after a 12x4 etc ... Noon at when ever o'clock and AM / PM stars for the 4 to 8, which I used to love. Given a good moon and good conditions I used to do stars at 0200 ... mainly to use an alternative method, ie morning ones Long by Chron and 0200 one Marq St. Hilaire. Good for keeping your hand in so to speak. That's similar to what we did on the cargo ships, but cruise ships had to advise pax of the Noon position, days run, average speed, etc right at Noon. When Mer/Alt was close to Noon or after, we couldn't wait to determine the Noon position, as once 8-bells sounded, the Noon position was broadcast. We worked up a Noon DR, then additional DR's for 08:30, 09:00, 09:30, 10:00 & 10:30. If Mer Alt was after Noon, we might start sights at 09:00 and add another at 11:00. We then did most of the calculations in the template, usually before the 2nd sight at 09:00. Sights were taken to the second, with a spotter counting down the time. Within minutes of getting the altitude, we had a bearing and intercept to plot. By 10:30, the position lines generally gave a reasonable cocked hat that we could select a Noon position. We then completed the day's run calculations and got the Noon speech ready. Also took Mer/Alt, but it was really only to confirm our informed guess of the Noon position. Rarely received a Sat Nav fix right at Noon, and while it did provide a position between fixes, it was a DR position. Comparing the Sat Nav position to our sights, we often got within a mile or two of the Sat Nav position. With multiple GPS, today's navigators have it so much easier. They even get a comfortable seat on the Bridge, no more standing. Only ever used Long by Chron at college, always used Marc St Hilaire at sea. Link to comment Share on other sites More sharing options...
wcook Posted July 3 #27 Share Posted July 3 On 7/1/2024 at 11:59 AM, lenquixote66 said: It was his initial plan to sail in 1912 but for some reason that I cannot recall he had to wait a year. Probably for the best. 1912 wasn’t the best year for ocean crossings. Link to comment Share on other sites More sharing options...
lenquixote66 Posted July 3 #28 Share Posted July 3 1 hour ago, wcook said: Probably for the best. 1912 wasn’t the best year for ocean crossings. Correct,if by chance he was on the Titanic I likely would not be posting this. Link to comment Share on other sites More sharing options...
Francinv Posted July 5 #29 Share Posted July 5 What I know is An ocean liner is built for speed and durability to handle long-distance, travel, while a cruise ship is designed for passenger comfort. Link to comment Share on other sites More sharing options...
The Traveling Man Posted July 9 #30 Share Posted July 9 On 7/1/2024 at 10:08 AM, chengkp75 said: both countries now recognize the international nautical mile of 6076.12 feet. That would produce a ratio of 1.150780303 to 1. Link to comment Share on other sites More sharing options...
The Traveling Man Posted July 9 #31 Share Posted July 9 On 7/1/2024 at 10:59 AM, lenquixote66 said: My father sailed from Liverpool to NYC in 1913 on a ship that was an ocean liner.There were people as well as cargo transported.It was his initial plan to sail in 1912 but for some reason that I cannot recall he had to wait a year. Perhaps Leonardo and Kate could explain it if their hearts could go on. Link to comment Share on other sites More sharing options...
The Traveling Man Posted July 9 #32 Share Posted July 9 On 7/1/2024 at 11:53 AM, MBP&O2/O said: Yup ...we were taught 6080 feet. And that produces a ratio of 1.15151515151515... On 7/1/2024 at 9:15 PM, jcl410 said: I just found out that the current (USA since 1954/UK since 1970) is exactly 1852 meters. Or 6076.1155 feet. And that results in a ratio of 1.15077945075 miles to the knot. Where will it all end? Link to comment Share on other sites More sharing options...
lenquixote66 Posted July 10 #33 Share Posted July 10 23 hours ago, The Traveling Man said: Perhaps Leonardo and Kate could explain it if their hearts could go on. Or perhaps James Cameron 1 Link to comment Share on other sites More sharing options...
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