Humminbird 1158? combo, Product Manual

Page: 78 / 232

What’s on the Side Imaging ® Display
(1198c SI Combo models only)
Side Imaging ® displays a number of easily recognizable features that allow for accurate interpretation
intensity of the sonar return. For example, rock and gravel provide a clearer sonar return than mud
better than downward slopes that face away from the transducer. You can find a number of easily
contour and structure, including the following items:
What’s on the Side Imaging ® Display
66
Depth - Water depth; can be set to alarm when the water
becomes too shallow.
Temperature - Water surface temperature
Speed - If a Speed accessory or GPS Receiver is
attached, the 1100 Series™ can display the speed of the
boat and can keep a triplog of nautical or statute miles
traveled.
Course - The current direction the boat is traveling
measured in degrees from North.
Voltage
Bottom Return
Topography Changes- The light part of the screen shows
where the beam is hitting hard bottom or rising terrain. The dark
part of the screen indicates soft bottom (sand, mud) or
descending terrain.
The water column shows the relative depth of the water
under the boat at a given time. Variations in the width of
the water column show variations in the distance to the
bottom as the boat passes over.
Shadows result from a lack of reflected sonar from a
particular area and can be more valuable for interpretation
than the sonar reflected by the object itself. Use shadows
to help you see the image in 3 dimensions, oriented in
space. You can gain insight into the actual shape of an
object, or the depth to which it has sunk into the bottom,
through shadows on the display. Objects standing on the
bottom cast a sonar shadow. The longer the shadow, the
taller the object. Fish also cast shadows. You can use the
shadow to interpret how close the fish is to the bottom.
8
6
9
5
4
7
3
2
1
1 2
10
Side Imaging® Range - Images shown on the right side of the screen are located on the right side of your boat, and
images shown on the left side of the screen are located on the left side of your boat. In this illustration, the sonar is pinging
142 feet on each side.
10