NavList:
A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Exercise #11 AM star fix
From: Greg R_
Date: 2008 Jun 6, 14:12 -0700
From: Greg R_
Date: 2008 Jun 6, 14:12 -0700
> I have plenty of star fixes in the old navigational notebook. The > next few, following these comments, will have somewhat vague DR > positions and I will only give the GPS fix at solution time. Excellent - the only thing I'd request is what I mentioned in the earlier reply to George that the solution be marked somehow to distinguish it from what just might be replies/comments/suggestions/etc. from you regarding that particular problem. > This will give it a more traditional flavor. I vote for Smoked Hickory. :-) > That will be it until October however, since I am leaving the ship > in less then 2 weeks. Permanently, or just rotating to a shore-based assignment? -- GregR --- Anabasis75@aol.com wrote: > I have plenty of star fixes in the old navigational notebook. The > next few, > following these comments, will have somewhat vague DR positions and I > will > only give the GPS fix at solution time. This will give it a more > traditional > flavor. > > I will try to get a few more next week when I go out to sea if the > weather > cooperates. That will be it until October however, since I am > leaving the > ship in less then 2 weeks. > > Jeremy > > > In a message dated 6/7/2008 6:18:42 A.M. West Pacific Standard Time, > > george@huxtable.u-net.com writes: > > > GregR wrote- > > And..... not to nit-pick what seems to be our preferred methodology > for > solving these, but if we're all just going to use our favorite > navigation computer programs (and I realize that computers are the > norm > for doing navigation these days, even I do that), what are we really > exercising other than our data entry skills (and maybe a chance to > see > how the various celnav programs compare with each other)? > > I'd like to request that at least a few of these be solved by the > "old > school" method (i.e. only an almanac, sight reduction tables, > plotting > sheets (and the usual navigation drawing tools), but no > computers/calculators other than maybe to check our work). I think > that's more a measure of celnav skills than just plugging a bunch of > numbers into a computer program and hitting "Calculate". > > ================ > > And I agree with him. It would be interesting to see a mix of > results, > obtained by various methods. > > And I would suggest another way to add interest and test us a bit > harder. > Jeremy bases his problems on a real-life situation (and I REALLY > appreciate > that!) but that means that he can start off with a precise GPS > position and > then we check whether the celestial observations agree with it. But > what > about dithering that GPS position, giving it only to the nearest > degree or > two, or more (and saying so), like a very bad case of "selective > availability"? Then, it would become a more real test, in first > having to > choose an appropriate AP (assumed position), just as one might have > to do at > sea, from a DR position, if "all else failed". > > George. > > contact George Huxtable at george@huxtable.u-net.com > or at +44 1865 820222 (from UK, 01865 820222) > or at 1 Sandy Lane, Southmoor, Abingdon, Oxon OX13 5HX, UK. > > > > > > > > > **************Get trade secrets for amazing burgers. Watch "Cooking > with > Tyler Florence" on AOL Food. > (http://food.aol.com/tyler-florence?video=4?&NCID=aolfod00030000000002) > > > > --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---