Humminbird 161 - Manual (Page 12)

5
What’s On the Display
The 100 Series TM can display a variety of useful information about the area under and
Timer - elapsed time with Temp/Speed Accessory
or GPS Receiver.
Depth - water depth; can be set to alarm when the
water becomes too shallow.
Speed - if a Temp/Speed accessory or GPS Receiver
is attached, the 100 Series
TM can display the speed of
the boat, and can keep a Triplog of nautical or
statute miles traveled.
Second Sonar Return - when the sonar signal
bounces between the bottom and the surface of
the water and back again. Use the appearance of
the second return to determine bottom
hardness. Hard bottoms will show a strong
second return, while soft bottoms will show a
very weak one or none at all.
Cursor Dialog Box - indicates cursor depth on
Longitude of the cursor position is shown,
be marked at the cursor position for later
Bait Ball
Hard Bottom
Rocky Bottom
Distance - distance traveled with Temp/Speed
Accessory or GPS Receiver.
NOTE: Entries in this view that list (with Temp/Speed or GPS Receiver) are available if either device
information from the GPS receiver will be displayed on the view.
Temperature - water surface temperature.
Average Speed - average speed reading with
Temp/Speed Accessory or GPS Receiver.
Cursor - available in Freeze Frame and can
depth of a sonar return and bottom depth