Transducer angle 20 degree area

[WYIfish]

I lack math very badly and need to figure my area of coverage with a 20 degree cone angle in 10 foot increments down to 200 feet.  I have hunted the net and came up empty. After all, we are all about fishing, not hunting.

[HWeber]

End of this thread gets you to 100 at least https://www.iceshanty.com/ice_fishing/index.php?topic=206449.0

[ice dawg]

Vexilar has a chart covering 10 foot increments down to 150'. Rule of thumb is a 20° transducer covers an area on the bottom of approximately one third of the depth.

[hardwater diehard]

Vexilar has a chart covering 10 foot increments down to 150'. Rule of thumb is a 20° transducer covers an area on the bottom of approximately one third of the depth.

Not certain you want to use such a wide angle in such deep water

http://vexilar.com/blog/2014/08/28/choosing-a-transducer-beam-angle

[Bubbadoyle]

Going by memory I’m pretty sure it’s about 3 1/2 foot for every 10 foot.

[badger132]

If it is a 20 degree included angle, the radius is depth*tan(20/2) or .176- so for 10 feet it is 1.76 radius or 3.62 diameter. For Area take Pi*r^2 or for 10 feet again, 3.1416*1.76^2 or 9.73 square feet at 10 foot depth.

For the general case, the diameter of the circle is .362* depth, and the area is the depth^2*.0973

Hope I did that right! 

[Agronomist_at_IA]