Side Imaging Sonar - Humminbird HELIX 5 SI GPS Operation Manual

Side Imaging Sonar

86° 86°
The HELIX SI GPS Fishfinder uses Side Imaging
455kHz 455kHz
sonar to provide a wide yet precise survey of a large
area of water, including detailed bottom topography
20°
and fish-attracting structure orientation. The Side
200kHz
Imaging transducer returns are processed into an
60°
83kHz
image similar to an aerial photograph.
Typically, the Side Imaging sonar can search an area
that is 480 feet wide (240 to each side), with a
typical depth performance of 100 feet. See What's
on the Side Imaging Display and Understanding
Side Imaging for more information.
The Side Imaging transducer also provides Down
Imaging views on the screen, with the same depth
limitation of 100 feet. See What's on the Down
Imaging Display for more information.
Depth capability is affected by such factors as boat
speed, wave action, bottom hardness, water
conditions, and transducer installation.
3
How Sonar Works