Posts: 2323
Location: Stevens Point, WI | This all depends on the depth of water and how far you have your unit ranged out. Sometimes it's 40ft, sometimes it's over a 100+ ft in deeper water. The shallower the water the less effective it is because you can't range out as far.
Sidescan Specifications:
Max Range: 455kHz (500ft — 250 per side) 800kHz (300ft —150 per side)
Max Speed: 35 mph (56 kmh)
Mark objects: 15 mph (24 kmh)
Optimum speed: 10 mph (16 kmh) or less
http://www.lowrance.com/en/Products/Marine/StructureScan-HD/Feature...
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