Sounder (Fish Finder) Introduction - Furuno NavNet TZtouch3 Series Operator's Manual

1. SYSTEM INTRODUCTION
1.14

Sounder (Fish Finder) Introduction

The sounder display provides a picture of the echoes found by the fish finder. Echoes
are scrolled across the screen from the right position to the left position.
The echoes at the right position are the current echoes. These echoes can be from
separate fish, a school of fish, or the bottom. Depth to the bottom is indicated, provided
the gain is set correctly. You can scroll the echoes backward.
Both low and high TX frequencies are provided. (Frequencies depend on the trans-
ducer connected.) The low frequency has a wide detection area, which is for general
detection and understanding bottom conditions. The high frequency has a narrow
beam that helps you inspect fish.
The range, gain, clutter and TVG can be adjusted automatically according to your pur-
pose (cruising or fishing) to let you do other tasks.
Home icon
Temp.
scale* 2
Bottom
echo
Slider
bar
Depth
1
* Requires appropriate transducer.
2
* Requires water temperature sensor.
A CHIRP or standard (CW narrowband) type transducer can be connected to this unit.
TruEcho CHIRP
noise images using broadband ultrasound and advanced signal processing. The re-
action of bottom and reef schools of fish and the seabed echo are displayed distinctly,
which is useful for suitable catch determination. For the model of CHIRP transducer,
refer to the configuration table in the equipment manual.
1-32
Event icon
Temp. graph*
Frequency Frequency
™
is a revolutionary technology that displays high-resolution, low-
Depth Depth
scale scale
2
Fish Fish
mark* mark*
1 1
A-scope