INFO: [Graphs/Depthfinders] Calculating cone diameters
I have a simple Excel spreadsheet that will calculate the cone diameter for your graph/depth finder for a given cone angle and depth. For anyone needing this, send me a PM. Forumula included if you want to roll your own.
Formula: 2*d*TAN((Pi/180)*(ConeAngle/2)) where d=depth and Pi =3.14
Quick Calcs for cone diameter:
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12° Cone Angle > 1/5th of depth (Depth/5 )
For example, at 100' depth, you would 'see' approximately 20' of bottom surface area
20° Cone Angle > 1/3rd of depth (Depth/3)
35° Cone Angle > Depth x .6
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Hope this helps someone. If anyone finds a mistake, please let me know.
BleuGhill
Now why didn't I think of that.....
:)
..but I think I'll just write the 'quick calcs' on a piece of duct tape and stick it on my graph ha ha. I'm afraid a big ol' table won't fit in my boat!
BleuGhill