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1. SYSTEM INTRODUCTION

1-16

1.9 Sounder (Fish Finder) Introduction

The sounder (fish finder) 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 always,

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.

Bottom

echo

Depth

A-scope

display

Depth scale

Frequency

mode

Depth

scale

Fish

symbol

DATA 1

DATA

DATA 2

DATA

RADAR

556 ft

780 ft

750-

RADAR

DATA 2

DATA

DATA 1

DATA

Furuno TZT9 User Manual

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