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+--- Thread: re: relative bearings maybe useful formula (/showthread.php?tid=242)
re: relative bearings maybe useful formula - Rumata - 08-01-2022
Gentlemen,
maybe something of an interest for you. I kinda wrote a formula which maybe useful. MAybe;> It can be used to get a running fix from bow and beam relative bearings. It is well-known procedure. But to speed up calculations, there are so-called method of double angles and 0.7, and also distance travels equalls distance off. Plus a few so-called special angles , like 36 deg bearing1 and 69 deg. bearing 2. In the last, particular case distance travelled is equal distance oiff the beam to the object you are taking bearing on.
Anyway, instead of using just a few angles why not to use any angle at the first bearing and calculate what angle should be at the second bearing if you want to have distance travelled between bearings to be equal to distance offf beam of that specific object you took bearings at.
a very simple drrawing is following.( see attachment).
Again, nothin revolutionary, just maybe helpful. Thank you
RE: re: relative bearings maybe useful formula - Rumata - 08-26-2022
Gentlemen, I'm including a very simple TAble ( please, see the Attachment to this message) which helps to use the above mentioned formula . Pretty much it is just two columns of angles., The numbers in red are the second bearing angles . The comments to the table explain the easiest way to use it. No need for calculators, just have this little table and take first bearing at ANY angle ( up to 45 deg). Second column tells you what second bearing should be to have the distace travelled to be equal to the distance abeam when passing the object. Your comments will be much appreciated.
Thank you
RE: re: relative bearings maybe useful formula - Rumata - 08-27-2022
This simple graph will make it even more easier. If there is a need in the whole idea, of course. ;> ;>