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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Using H.O. 249 tables
From: Dave Boatman
Date: 1997 Jul 29, 1:52 PM
From: Dave Boatman
Date: 1997 Jul 29, 1:52 PM
Hi guys, Having just delivered a ULDB 33' from Newport Beach, California to Honolulu, Hawaii I had an interesting little experience with the celestial. During this delivery I intended to do some serious improvement in my skills with twilight stars (and indentification) and with calculator techniques which I've hardly ever used. I've always been an advocate of Tables and blank paper, no forms (let's not re-open that debate!) and sure enough the first casualty of the trip was the TI calculator with brand new battery. It was flipping funny numbers and I ended up sending it swimming, darn it. Back to the traditional tables and paper. Then the cloud cover didn't cooperate a whole lot either but I managed a couple of high points, anyway. My 'new' sextant, a 3/4 size Simex, turned out very reliable fixes and was easier than I thought it would be. For open ocean I was pretty pleased. All my fixes came out within 5nm of actual position, usually 3nm, and in one case 1nm!* How do I know? GPS! :-) Dave Boatman LAKA/Honolulu dboat@lava.net *....though the 1nm error was surely do to random chance (SOME of them are going to be closer and some further). ** Using H.O. 249 tables and Yachtsman's Almanac *** Sure I used a GPS, but I was ready for it to follow the path of the calculator.....electronics being what they are. =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-= =-= TO UNSUBSCRIBE, send this message to majordomo@ronin.com: =-= =-= navigation =-= =-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=-=--=-=