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Description
how to gauge the accuracy of chart data
Having avoided the Alaskan challenge for years
This comes about because the waterway is narrower some distance away from the official reporting station
Edition Date: 28-Mar-2014
includiing Boundary Pass
#111 Compute-A-Course Celestial Navigation how to gauge the accuracyThe Compute A Course is a compact, multi purpose plotting tool ideal for adding to your general boating or commercial navigational tools. The Compute A Course navigational tools can be used for position fixing, course plotting, and distance measurements with the included scales. Overview Used for course plotting, distance measuring and position fixing. Instructions for use located on back of vinyl storage sleeve. Logarithmic speed scale for solving
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