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, 12:05 -0700
From: Greg R_
Date: 2008 Jun 6, 12:05 -0700
Navigator results for 05/28/2008 19:25:00Z: 14°56.1'N 145°08.0'E (And since that's really close to the DR position, either there must not have been a lot of wind and/or current that day - or the navigator is really good at what s/he does... ;-)) 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". -- GregR --- Anabasiswrote: > > Exercise #11 AM Star Fix. > > On 29 May 2008 (local date), a ship was sailing course 158 degrees > True at a speed of 14.7 knots. Around 05h 25m ZT (ZD -10), a round > of > sights was taken. The DR is Latitude 14deg 56� North, Longitude > 145deg 07.5� East. Height of eye is 106 feet, Temp/Press is 82 F/ > 1010 MB. Index Error is 0.0. > > Here is the sight information, all times in _Zone Time_. > > Alpheratz: Hs : 49deg 05.8� @ 05h 13m 38s > > Fomalhaut: Hs 40deg 09.4� @ 05h 15m 58s > > Vega: Hs 45deg 59.6� @ 05h 20m 08s > > Deneb: Hs 58deg 16.8� @ 05h 21m 35s > > Jupiter: Hs 43deg 52.4� @ 05h 22m 31s > > Moon (LL): Hs 59deg 45.4� @ 05h 24m 43s > > > Determine a star fix at 05h25m local time. > > Jeremy > > > > --~--~---------~--~----~------------~-------~--~----~ Navigation List archive: www.fer3.com/arc To post, email NavList@fer3.com To , email NavList-@fer3.com -~----------~----~----~----~------~----~------~--~---