由 
http://www.tackletour.com/reviewbottomline1200.html
"The side finder was even able to audibly sound off as it detected bobbers we placed in the water 75 feet away."
以前见过有人用此sidefinder 冰釣淺水找花花
网上资料, 原厂Bottomline 自2006年给Humminbird 母公司Johnson Outdoors 收购后, 此物即告停产, 直至近年Humminbird 才重新推出其名下之FishingBuddy Max Di, 但未见有类以前sidefinder 之功能, 这卩门看耒Garmin 仍能一伙獨大..
我估摸着, 用一般ff的skim transducer 在冰下横放着, 不用动也能有sidefinding 的功能, 就是要自己做calibration, 习惯一下如何去阅讀訊号....不知有人试过没
Johnson Outdoors owns, fishing-wise, BottomLine, Humminbird, Cannon, MinnKota .....etc
