the second position line can be transposed by the distance log, so the fix is for a certain time and plotted as such. That takes care of the distance sailed between the two fixes. If you omit all the corrections the position would be far worse than 10-20 miles. So if you have to do some of them, why not do all of them properly?

@@karhukivi Because the actual value of a sextant is as an emergency backup. You may use it as a hobby or to kill some time, so do it like it is 1763 .Have fun. But as a backup in case some really bad has happened to my electronics, I am in a different situation. I need to plot a fast curse to the next Island, cost line or anything where I can fix my boat . Finding Hawaii does not need a +/- 1 mile precision . If I use the sextant I am in distress having to work all kinds of problems in parallel . So KISS is the motto of the situation. To be honest , I have a sextant and also the needed paperwork on the shelf. Sometimes I pull it out and do all the calculations (including all corrections) just for fun. But if I really need a sextant to get me someplace save, I will need a quick but rough curse plotting. What do you say if you make calculation errors because you are in distress? There are worlds between having some afternoon fun with tea and biscuits to nibble on while you plot your course and having to plot a course while doing first aid on a crew mate and getting the bilge pumped by hand at the same time. In summary it is all fun and games until something serious happens and you need to do everything as fast as you can. I was there , I know what I am taking about.

@@karhukivi BTW, I did not say to ignore all corrections, I said "do not get too picky with corrections" Just use some common sense when to decide how much precision is needed . I still double down on that +/- 10/20 miles on ocean crossings are good enough :-) Peace

@@wollekemper8317 Yes, I agree with you in general terms. It is worth reading Sir Francis Chicester's account of sailing towards the Bass Straits without an adequate fix for several days of cloudy weather and realising he might arrive at night into a narrowing area with currents and wind pushing him. In his panic he made a big error in calculating his last position and later realised the mistake, which is reproduced in the book. My point is simply that if one is going to make a fix it might as well be as good as possible, rather than a quick and inaccurate position.

@@wollekemper8317 It is worth reading Sir Francis Chicester's book Gypsy Moth on heading towards the Bass Straits pushed by wind and current without an accurate fix for several days of cloudy weather. He made an error on his last position which he later realised and it is reproduced in the book. The effort required to do the best fix possible is the same as doing a bad one, so I would always opt to do the best one I can even if it is not warranted, as much for personal satisfaction as to have at least one reliable position... just inn case...!