Thank You, Table of Contents | Humminbird 77c specification

M77_Man_Eng_531350-1_B.qxd 1/3/2005 4:29 PM Page 2

Thank You!

Thank you for choosing Humminbird®, America's #1 name in fishfinders. Humminbird® has built its reputation by designing and manufacturing top-quality, thoroughly reliable marine equipment. Your Humminbird® is designed for trouble-free use in even the harshest marine environment. In the unlikely event that your Humminbird® does require repairs, we offer an exclusive Service Policy - free of charge during the first year after purchase, and available at a reasonable rate after the one-year period. For complete details, see the separate warranty card included with your unit. We encourage you to read this operations manual carefully in order to get full benefit from all the features and applications of your Humminbird® product.

Contact our Customer Resource Center at either 1-800-633-1468 or visit our website at www.humminbird.com.

WARNING! This device should not be used as a navigational aid to prevent collision, grounding, boat damage, or personal injury. When the boat is moving, water depth may change too quickly to allow time for you to react. Always operate the boat at very slow speeds if you suspect shallow water or submerged objects.

WARNING! Disassembly and repair of this electronic unit should only be performed by authorized service personnel. Any modification of the serial number or attempt to repair the original equipment or accessories by unauthorized individuals will void the warranty. Handling and/or opening this unit may result in exposure to lead, in the form of solder.

WARNING! This product contains lead, a chemical known to the state of California to cause cancer, birth defects and other reproductive harm.

Humminbird®, DualBeam PLUS™, SmartCast®, WhiteLine®, RTS®, X-Press™ Menu, Fish ID+™, Structure ID®, and WeatherSense® are trademarked by or registered trademarks of Humminbird®.

Table of Contents
How Sonar Works	1
DualBeam PLUS™ Sonar	2
What’s On the Display	3
Views	5
Sonar View	5
Understanding Sonar History	7
Real Time Sonar (RTS®) Window	7
Sonar Zoom View	8
200/83 kHz Split Sonar View	9
Big Digits View	10
Bottom Presentation	11
Key Functions	13
POWER/LIGHT Key	13
VIEW Key	13
MENU Key	14
4-WAY Cursor Control Key	14
EXIT Key	15
Accessory Bus	15
Powering Up the Unit	16
The Menu System	17
Start-Up Options Menu	19
Normal Operation	19
Simulator	20
System Status	21
PC Connect (with PC Connect Cable Only)	21