Dennis is right, of course. Almost any accurate timepiece can serve as your “chronometer”. For example, the $15 Tmex digital watch I have on right now is 42 seconds fast when compared to the US Naval Observatory mater time clock.
One of the early lessons in the Power Squadron basic navigation course teaches you how to get accurate time, determine the accuracy of you timepiece, and adjust for inaccuracy when doing your calculations. If I recall correctly, my Timex gains about ½ second per day. When I was doing sights regularly, I used to keep track of the date I reset the watch in the front of my nautical almanac. Rick Brass Washington, NC From: CnC-List [mailto:cnc-list-boun...@cnc-list.com] On Behalf Of Dennis C. Sent: Monday, January 28, 2013 9:56 AM To: cnc-list@cnc-list.com Subject: Re: Stus-List Sextant .....and also remember, a chronometer doesn't keep the "correct" time, it keeps the "same" time. A certified chronometer will lose or gain the same amount every day. Dennis C. Touche' 35-1 #83 Mandeville, LA
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