scugpg Posted January 14, 2009 Report Share Posted January 14, 2009 Hi all, I recently bought a new fishfinder and I'm trying to figure out what kind of coverage I'll have below the boat. I was wondering if there is a calculator or chart that I can use to figure out the amount of area I'm covering at a certain depth below the boat. Let me know if you guys are familiar with this. thanks, scugog Link to comment Share on other sites More sharing options...
Roy Posted January 14, 2009 Report Share Posted January 14, 2009 I'm sure that your user's manual has that info in it....does it? Link to comment Share on other sites More sharing options...
Terry Posted January 14, 2009 Report Share Posted January 14, 2009 (edited) DEPTH 9° ... 12°... 19° 10 ... 1.6.... 2.2 ... 3.4 20 ... 3.2 ... 4.3 ... 6.7 30 ... 4.7 ... 6.3 ... 10.0 40 ... 6.3... 8.4 ... 13.4 50 ... 7.9... 10.6... 16.7 60 ... 9.4... 12.6 ... 20.0 70 11.0... 14.7 ... 23.4 80 12.6... 16.8 ... 26.8 90 14.2... 20.0 ... 30.1 100 15.7... 21.0 ... 33.5 120 18.9... 25.2 ... 40.2 150 23.6... 31.5 ... 50.2 Edited January 14, 2009 by Terry Link to comment Share on other sites More sharing options...
scugpg Posted January 14, 2009 Author Report Share Posted January 14, 2009 I'm sure that your user's manual has that info in it....does it? Hi Roy - I went through it again and didn't see anything. I believe mine has a 20deg cone angle on the transducer if that helps. Link to comment Share on other sites More sharing options...
Terry Posted January 14, 2009 Report Share Posted January 14, 2009 so in ten ft about 2.4 ft coverage in 150 ft of water about 52 ft of coverage Link to comment Share on other sites More sharing options...
xeon Posted January 14, 2009 Report Share Posted January 14, 2009 (edited) http://s86.photobucket.com/albums/k102/x_x...t=mathrules.jpg Just change the 19degrees to whatever your transducer is, then change the 10feet to the depth you want. Use the formula and your set. Edited January 14, 2009 by xeon Link to comment Share on other sites More sharing options...
scugpg Posted January 14, 2009 Author Report Share Posted January 14, 2009 so in ten ft about 2.4 ft coveragein 150 ft of water about 52 ft of coverage Thanks Terry for the fast response. Much appreciated. Link to comment Share on other sites More sharing options...
scugpg Posted January 14, 2009 Author Report Share Posted January 14, 2009 Stumbled across this as well http://www.fishfinder-store.com/howfifiwo.html Sonar Beam Coverage Area Below is a quick reference chart for the area covered by the specific cone angle listed. For example, if you are fishing in 10 feet of water and the cone angle on your transducer is 20 degrees, the area across the bottom is 3.5 feet. * 20 degrees - 0.35 or roughly 1/3 of depth * 24 degrees - 0.42 or roughly 2/5 of depth * 30 degrees - 0.53 or roughly 1/2 of depth * 40 degrees - 0.72 or roughly 3/4 of depth * 50 degrees - 0.93 or roughly 9/10 of depth * 60 degrees - 1.15 x depth * 70 degrees - 1.4 x depth * 73 degrees - 1.48 x depth * 80 degrees - 1.68 x depth * 90 degrees - 2 x depth * 100 degrees - 2.38 x depth * 110 degrees - 2.85 x depth Link to comment Share on other sites More sharing options...
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