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A Community Devoted to the Preservation and Practice of Celestial Navigation and Other Methods of Traditional Wayfinding
Re: Calibrating the Practice Bubble Horizon with a sea horizon
From: Bill B
Date: 2014 Mar 17, 17:58 -0400
From: Bill B
Date: 2014 Mar 17, 17:58 -0400
On 3/17/2014 5:36 PM, Sean C wrote: > I think that's what the instructions say: INSTRUCTIONS! Thanks. I bought this maybe 9 years ago and was far from a sea horizon, so used the method I described earlier with LAN. It only dawned on me two years ago it could be fear easier to use a natural horizon, but I hadn't thought it through until now. I'll have to look for the instructions. :-) It was about 2 years ago that Alex and I enjoyed the 85F weather (about 40F water if memory serves) on the St. Joe, MI north pier and had an almost 10' error with both operators and sextants. I wonder if once properly calibrated the PBH could act as a dip meter of sorts to indicate gross errors? Am not knowledgeable to understand what portion of the error could be accounted for with and dip, and what portion from a strange lapse rate between the visible horizon and the body.
