humminbird 871 si questions

[crazyKat]

i got it tuesday used it yesterday and i love it. could see a car tire in 30 ft of water plain as day. got a question on the regular sonar what should the sensitivity be set on? i was showing arches but it would be half arch orpart of an arch

[biga]

if you are seeing half arches you need to tilt the transducer a little till u get the full arch... i cant tell u what direction to tilt it without seeing the arch... your sensitivity will vary with water conditions but my normal setting is around 11...

[320hotrod]

If you only see the front half of the arch, the front of the transducer is too high. Vice versa the other way. Check this out for more good info.
http://www.fishfindercity.com/fitiandin.html

[tswebb71]

That depends Jody. If the fish doesn't cross fully under the boat (through the sonar "cone"), you will only get a half arch.