Mercator Sailing: Course and Distance

08292018, 09:02 PM
(This post was last modified: 09102019 11:48 PM by Gene222.)
Post: #11




RE: Mercator Sailing: Course and Distance
Okay. You convinced me. I will use your ATANH formula (the first one). The formula really does need to be accurate to transition to the formula for the EastWest course. I think I got the program just about done, but I need to recheck it to see if I got the signage right for all cases. I got hung up on the 0 and 180 degree meridian crossings. Attached are the Mercator Sailing signage rules that were not included in the Calculator AFloat book.
EDIT 11/9/18. The following is from The Yachtsmanâ€™s Handybook by WH Rosser, Charles Wilson Publisher, 1877, Brief Rules In Navigation Chapter, 6: Course and Distance by Mercatorâ€™s Sailing Section. 

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