How it Works
Humminbird
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788ci HD
Owner's Manual
181 pgs14.51 Mb0
Table of contents
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Humminbird 788ci HD, 788ci HD DI Combo Owner's Manual

Operations Manual
788ci HD & 788ci HD DI Combo
531833-1EN_A

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 the full benefit from all the features and applications of your Humminbird® product.
Contact our Customer Resource Center at 1-800-633-1468 or visit our Web site at 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.
WARNING! This product contains chemicals known to the State of California to cause cancer and/or reproductive harm.
WARNING! Do not travel at high speed with the unit cover installed. Remove the unit cover before traveling at speeds above 20 mph.
WARNING! Do not travel at high speed with the unit cover installed. Remove the unit cover before traveling at speeds above 20 mph.
NOTE: The illustrations in this manual may not look exactly like the display on your Humminbird® model, but your model will work in the same way.
NOTE: Some features discussed in this manual require a separate purchase, and some features are only available on international models. Every effort has been made to clearly identify those features. Please read the manual carefully in order to understand the full capabilities of your model.
ENVIRONMENTAL COMPLIANCE STATEMENT: It is the intention of Humminbird® to be a responsible corporate citizen, operating in compliance with known and applicable environmental regulations, and a good neighbor in the communities where we make or sell our products.
WEEE DIRECTIVE: EU Directive 2002/96/EC “Waste of Electrical and Electronic Equipment Directive (WEEE)” impacts most distributors, sellers, and manufacturers of consumer electronics in the European Union. The WEEE Directive requires the producer of consumer electronics to take responsibility for the management of waste from their products to achieve environmentally responsible disposal during the product life cycle.
WEEE compliance may not be required in your location for electrical & electronic equipment (EEE), nor may it be required for EEE designed and intended as fixed or temporary installation in transportation vehicles such as automobiles, aircraft, and boats. In some European Union member states, these vehicles are considered outside of the scope of the Directive, and EEE for those applications can be considered excluded from the WEEE Directive requirement.
This symbol (WEEE wheelie bin) on product indicates the product must not be disposed of with other household refuse. It must be disposed of and collected for recycling and recovery of waste EEE. Humminbird® will mark all EEE products in
accordance with the WEEE Directive. It is our goal to comply in the collection, treatment, recovery, and environmentally sound disposal of those products; however, these requirements do vary within European Union member states. For more information about where you should dispose of your waste equipment for recycling and recovery and/or your European Union member state requirements, please contact your dealer or distributor from which your product was purchased.
ROHS STATEMENT: Product designed and intended as a fixed installation or part of a system in a vessel may be considered beyond the scope of Directive 2002/95/EC of the European Parliament and of the Council of 27 January 2003 on the restriction of the use of certain hazardous substances in electrical and electronic equipment.
ATTENTION INTERNATIONAL CUSTOMERS: Products sold in the U.S. are not intended for use in the international market. Humminbird® international units provide international features and are designed to meet country and regional regulations. Languages, maps, time zones, units of measurement, and warranty are examples of features that are customized for Humminbird® international units purchased through our authorized international distributors.
To obtain a list of authorized international distributors, please visit our Web site at humminbird.com or contact our Customer Resource Center at (334) 687-6613.
ProMap™ and LakeMaster® are trademarked by or registered trademarks of Waypoint Technologies, Inc.
Navionics® Gold, HotMaps™, and HotMaps Premium™ are registered trademarks of Navionics®.
© 2010 Humminbird®, Eufaula AL, USA. All rights reserved.

Table of Contents

Power On the Unit 1
How Sonar Works 2
DualBeam PLUS™ Sonar (DualBeam PLUS™ models only [788ci HD]) .......................... 4
Down Imaging™ Sonar
(Down Imaging™ models only [788ci HD DI, XNT 9-DI-T Transducer])..................................5
Dual Beam Ice Transducer QuadraBeam PLUS™ Sonar WideSide® Sonar Universal Sonar 2
(with optional-purchase WideSide® transducer) .................................. 8
How GPS Works 9
What’s on the Sonar Display 10
Understanding the Sonar Display .......................................................................... 12
Real Time Sonar (RTS™) Window .......................................................................... 12
SwitchFire™ ..............................................................................................................13
Freeze Frame and Active Cursor.............................................................................. 13
Instant Image Update ..............................................................................................13
Bottom Presentation ................................................................................................ 14
What’s on the Down Imaging™ Display
(Down Imaging™ models only [788ci HD DI])
Understanding the Down Imaging™ Display ..........................................................18
Interpreting the Display............................................................................................18
Down Imaging™ Sensitivity ....................................................................................19
Freeze Frame and Active Cursor ..............................................................................19
Views 20
Sonar View .............................................................................................................. 22
Sonar Zoom View .................................................................................................... 23
Split Sonar View ...................................................................................................... 24
Big Digits View ........................................................................................................ 25
Down Imaging™ View
Circular Flasher View .............................................................................................. 28
Snapshot and Recording View ................................................................................ 33
Side Beam View WideSide® View
(with optional-purchase QuadraBeam PLUS™ transducer).................... 40
(with optional-purchase WideSide® transducer) .................................. 44
(optional-purchase XI 9 20 Ice Transducer only) .................... 6
(with optional-purchase QuadraBeam PLUS™ transducer) .... 7
(compatible w/ optional-purchase Minnkota trolling motors) ................ 8
16
(Down Imaging™ models only [788ci HD DI]) ............................26
i
Table of Contents
Bird’s Eye View ...................................................................................................... 45
Chart View.............................................................................................................. 46
Chart/Sonar Combo View...................................................................................... 48
Chart/Down Imaging™ Combo View Down Imaging™/Sonar Combo View
View Orientation .................................................................................................... 51
Viewing Cartography ............................................................................................ 51
Introduction to Navigation 54
Waypoints, Routes, and Tracks ............................................................................ 54
Save, Edit, or Delete a Waypoint .......................................................................... 56
Navigate to a Waypoint or Position ...................................................................... 58
Add a Waypoint Target or Trolling Grid ................................................................ 59
Save, Edit, or Delete a Route ................................................................................ 60
Save or Clear a Current Track................................................................................ 61
Edit, Delete, or Hide Saved Tracks ........................................................................ 61
What’s on the Control Head 64
Key Functions 65
POWER/LIGHT Key .............................................................................................. 65
VIEW Key .............................................................................................................. 65
ZOOM (+/-) Key...................................................................................................... 66
4-WAY Cursor Control Key .................................................................................. 66
INFO Key ................................................................................................................ 67
MENU Key ............................................................................................................ 68
MARK Key .............................................................................................................. 68
GOTO Key................................................................................................................ 69
VIEW PRESET Keys ................................................................................................ 69
EXIT Key ................................................................................................................ 69
(Down Imaging™ models only [788ci HD DI]) .... 49
(Down Imaging™ models only [788ci HD DI]).... 50
SD Memory Card Slots 70
Add Maps to Your Fishing System........................................................................ 71
Export Navigation Data.......................................................................................... 72
Update Software.................................................................................................... 73
Accessory Bus 74
ii
Table of Contents
The Menu System 75
Start-Up Options Menu 76
Normal...................................................................................................................... 76
Simulator ................................................................................................................ 77
System Status ........................................................................................................ 77
Self Test.................................................................................................................... 78
Accessory Test.......................................................................................................... 78
GPS Diagnostic View .............................................................................................. 79
PC Connect and Software Updates
X-Press™ Menu 81
Main Menu 82
Quick Tips for the Main Menu................................................................................ 83
Note for all Menu Settings...................................................................................... 84
User Mode (Normal or Advanced).......................................................................... 85
(with optional-purchase PC Connect cable only) .... 80
Sonar X-Press™ Menu
(Sonar Views only)
Side (WideSide® transducer: WideSide® View only) ........................................................ 88
Sensitivity ................................................................................................................ 88
Upper Range
(Advanced: Sonar, Split Sonar, Circular Flasher, and Big Digits Views only).... 89
Lower Range .......................................................................................................... 90
Side Beam Range
(WideSide® transducer: WideSide® View only) .................................. 90
Chart Speed ............................................................................................................ 91
Quad Layout
Side Beam View only)
Bottom Lock Bottom Range Cancel Navigation
Down Imaging™ X-Press™ Menu
(with Optional-Purchase QuadraBeam PLUS™ Transducer,
................................................................................................ 91
(Sonar Zoom View only) .......................................................................... 92
(Sonar Zoom View only when Bottom Lock is On) .................................. 92
(only when Navigating) ................................................................ 92
(Down Imaging™ Views only [788ci HD DI])
Imaging Sensitivity .................................................................................................. 94
Upper Range
(Advanced) .......................................................................................... 94
Lower Range............................................................................................................ 95
Chart Speed.............................................................................................................. 95
Imaging Colors ........................................................................................................ 96
Cancel Navigation
(only when Navigating) ................................................................ 96
iii
87
93
Table of Contents
Flasher X-Press™ Menu
(Circular Flasher View only)
Sensitivity .............................................................................................................. 98
Upper Range (Advanced: Sonar, Split Sonar, Circular Flasher,
and Big Digits Views only)
........................................................................................ 98
Lower Range ........................................................................................................ 99
Color Palette (Circular Flasher View, Ice Fishing Mode only) ...................................... 100
Cancel Navigation (only when Navigating) ............................................................ 100
Snapshot and Recording X-Press™ Menu
(Snapshot and Recording View only)
Start Recording (optional-purchase SD Memory Card,
Snapshot and Recording View only)
Stop Recording (optional-purchase SD Memory Card only) ...................................... 102
Delete Image (optional-purchase SD Memory Card,
Snapshot and Recording View only)
Delete All Images (optional-purchase SD Memory Card,
Snapshot and Recording View only)
Delete Recording (optional-purchase SD Memory Card,
Snapshot and Recording View only)
Delete All Recordings (optional-purchase SD Memory Card,
Snapshot and Recording View only)
Pings Per Second (optional-purchase SD Memory Card,
Snapshot and Recording View only)
Playback Speed
Snapshot and Recording View only)
Stop Playback
(optional-purchase SD Memory Card,
(optional-purchase SD Memory Card only) ........................................ 105
........................................................................ 102
........................................................................ 102
..........................................................................102
........................................................................ 103
........................................................................ 103
........................................................................ 103
........................................................................ 104
97
101
Navigation X-Press™ Menu
(Navigation views only)
Waypoint [Name] (Only with an active cursor on a waypoint) .................................. 107
Cursor To Waypoint (Chart or Combo View only) .................................................... 107
Save Current Track .............................................................................................. 108
Clear Current Track.............................................................................................. 108
Save Current Route (only when Navigating) .......................................................... 108
Skip Next Waypoint (only when Navigating) .......................................................... 108
Cancel Navigation
(only when Navigating) ............................................................ 109
iv
106
Table of Contents
Remove Target (only if a Target is Active) .................................................................. 109
Remove Grid Sonar Window Waypoint [Name]
Alarms Menu Tab 111
Depth Alarm .......................................................................................................... 112
Fish ID Alarm.......................................................................................................... 112
Low Battery Alarm ................................................................................................ 112
Temp. Alarm .......................................................................................................... 113
Off Course Alarm ....................................................................................................113
Arrival Alarm .......................................................................................................... 114
Drift Alarm.............................................................................................................. 114
Alarm Tone ............................................................................................................ 114
Sonar Menu Tab 115
Beam Select .......................................................................................................... 116
Imaging Frequency
Surface Clutter ...................................................................................................... 119
SwitchFire™ .......................................................................................................... 120
Fish ID+™ .............................................................................................................. 121
Fish ID Sensitivity .................................................................................................. 122
Real Time Sonar (RTS™) Window ........................................................................ 122
Sonar Colors
Circular Flasher View, and Big Digits View)
Bottom View .......................................................................................................... 123
Zoom Width .......................................................................................................... 124
83 kHz Sensitivity 455 kHz Sensitivity 455 kHz Sensitivity WideSide® Sensitivity Depth Lines Noise Filter Max Depth Water Type
(only if a Grid is Active) ........................................................................ 109
(Combo View only) .......................................................................... 109
(Most recently-created waypoint) .................................................. 110
(Down Imaging™ Views only [788ci HD DI])..................................118
(Sonar View, Sonar Zoom View,
................................................................ 123
(Advanced, DualBeam PLUS™ Sonar only) .................................... 124
(Advanced, Down Imaging™ Views only [788ci HD DI]) ..................124
(Advanced, with optional purchase QuadraBeam PLUS™ transducer)..124
(Advanced: with WideSide® transducer) .................................. 125
(Advanced) .......................................................................................... 126
(Advanced) ............................................................................................ 126
(Advanced) ............................................................................................ 127
(Advanced) ............................................................................................ 127
v
Table of Contents
Transducer Select ................................................................................................ 128
Ice Fishing Mode ................................................................................................ 128
Imaging Colors
Navigation Menu Tab 129
Current Track........................................................................................................ 130
Saved Tracks ........................................................................................................ 130
Waypoints ............................................................................................................ 131
Routes .................................................................................................................. 132
Chart Orientation ................................................................................................ 132
North Reference .................................................................................................. 133
Waypoint Decluttering
Trolling Grid Rotation .......................................................................................... 133
Trackpoint Interval .............................................................................................. 133
Track Min Distance Map Datum
Course Projection Line ........................................................................................ 134
Export All Nav Data Delete All Nav Data
Continuous Navigation Mode ............................................................................ 135
GPS Receiver Override
Chart Menu Tab 136
Lat/Lon Grid.......................................................................................................... 137
Navaids on Bird’s Eye View ................................................................................ 137
Chart Select.......................................................................................................... 137
Set Simulation Position Set Map Offset Clear Map Offset
Shaded Depth ...................................................................................................... 138
Chart Detail Level ................................................................................................ 139
Map Borders ........................................................................................................ 139
Spot Soundings.................................................................................................... 140
Contour Lines
(Down Imaging™ Views only [788ci HD DI]) ......................................128
(Advanced) ...................................................................... 133
(Advanced) ............................................................................ 134
(Advanced) ........................................................................................ 134
(optional-purchase SD Memory Card required) .......................... 134
(Advanced) ............................................................................ 135
(Advanced).......................................................................... 135
(Advanced) ...................................................................... 137
(Advanced) .................................................................................. 138
(Advanced) .............................................................................. 138
(optional-purchase LakeMaster® charts only) ...................................... 140
vi
Table of Contents
Depth Colors (optional-purchase LakeMaster® charts only).......................................... 140
Depth Highlight Depth Highlight Range (+/-) Water Level Offset Shallow Water Highlight Lake List
Setup Menu Tab 143
Units - Depth.......................................................................................................... 144
Units - Temp
Units - Distance .................................................................................................... 144
Units - Speed ........................................................................................................ 144
User Mode ............................................................................................................ 145
Language
Triplog Reset ........................................................................................................ 145
Restore Defaults .................................................................................................... 145
Select Readouts Depth Offset Temp. Offset Speed Calibration Local Time Zone Daylight Saving Time Position Format Time Format Date Format NMEA Output
Sonar...................................................................................................................... 151
Demonstration........................................................................................................ 151
Sound Control ........................................................................................................ 151
(optional-purchase LakeMaster® charts only) .................................... 140
(optional-purchase LakeMaster® charts only) ................ 141
(optional-purchase LakeMaster® charts only) ................................ 141
(optional-purchase LakeMaster® charts only) ...................... 141
(optional-purchase LakeMaster® charts only) ................................................ 142
(International only) .............................................................................. 144
(International Models only)........................................................................ 145
(Advanced, Sonar View only) .......................................................... 146
(Advanced).......................................................................................... 147
(Advanced, with Temp/Speed only)........................................................ 148
(Advanced, with Temp/Speed only) .............................................. 148
(Advanced).................................................................................... 148
(Advanced)............................................................................ 148
(Advanced) .................................................................................... 149
(Advanced, International only) .............................................................. 149
(Advanced, International only)................................................................ 149
(Advanced) ...................................................................................... 150
Views Menu Tab 152
vii
Table of Contents
Accessories Menu Tab 153
Screen Snapshot.................................................................................................... 154
Troubleshooting 155
Fishing System Doesn’t Power Up........................................................................ 155
Fishing System Defaults to Simulator with a Transducer Attached .................. 155
Display Problems.................................................................................................... 156
Finding the Cause of Noise .................................................................................. 157
700 Series™ Fishing System Accessories 158
Specifications 160
Glossary 161
Contact Humminbird® 169
NOTE: Entries in this Table of Contents which list (International Only) are only available on products sold outside of the U.S. by our authorized international distributors. To obtain a list of authorized international distributors, please visit our Web site at humminbird.com or contact our Customer Resource Center at
(334) 687-6613.
NOTE: Entries in this Table of Contents which list (with Temp/Speed only) require the
purchase of separate accessories. You can visit our Web site at humminbird.com to order these accessories online or contact our Customer Resource Center at
1-800-633-1468.
NOTE: Some features discussed in this manual require a separate purchase, and
some features are only available on international models. Every effort has been made to clearly identify those features. Please read the manual carefully in order to understand the full capabilities of your model.
viii

Power On

Follow the instructions below to power on your Humminbird® control head.
788ci Title Screen
1. Press the POWER/LIGHT key.
2. When the Title screen is displayed, press the MENU key to access the Start-Up Options Menu.
3. Use the 4-WAY Cursor Control key to select Normal (if there is a transducer attached to the control head), or Simulator (if there isn’t a transducer attached to the control head).
NOTE: See Start-Up Options Menu for more information.
• If a functioning transducer is connected, Normal operation will be selected automatically at power up, and your Fishing System can be used on the water.
• If a transducer is not connected and you wait too long to select a Start-Up Option, the system will default to whichever menu is already highlighted.
• In Simulator you can learn how to use your control head and save settings in advance for later use.
1
Power On

How Sonar Works

Sonar technology is based on sound waves. The 700 Series™ Fishing System uses sonar to locate and define structure, bottom contour and composition, as well as depth directly below the transducer.
Your 700 Series™ Fishing System sends a sound wave signal and determines distance by measuring the time between the transmission of the sound wave and when the sound wave is reflected off of an object; it then uses the reflected signal to interpret location, size, and composition of an object.
Sonar is very fast. A sound wave can travel from the surface to a depth of 240 ft (70 m) and back again in less than 1/4 of a second. It is unlikely that your boat can “outrun“ this sonar signal.
SONAR is an acronym for SOund and NAvigation Ranging. Sonar utilizes precision sound pulses or “pings“ which are emitted into the water in a teardrop-shaped beam.
The sound pulses “echo“ back from objects in the water such as the bottom, fish, and other submerged objects. The returned echoes are displayed on the LCD screen. Each time a new echo is received, the old echoes are moved across the LCD, creating a scrolling effect.
How Sonar Works
2
When all the echoes are viewed side by side, an easy to interpret “graph“ of the bottom, fish, and structure appears.
The sound pulses are transmitted at various frequencies depending on the application. Very high frequencies (455 kHz) are used for greatest definition but the operating depth is limited. High frequencies (200 kHz) are commonly used on consumer sonar and provide a good balance between depth performance and resolution. Low frequencies (83 kHz) are typically used to achieve greater depth capability.
The power output is the amount of energy generated by the sonar transmitter. It is commonly measured using two methods:
• Root Mean Square (RMS) measures power output over the entire transmit cycle.
• Peak to Peak measures power output at the highest points.
The benefits of increased power output are the ability to detect smaller targets at greater distances, ability to overcome noise, better high speed performance, and enhanced depth capability.
3
How Sonar Works

DualBeam PLUS™ Sonar

(DualBeam PLUS™ models only [788ci HD])
Your 788ci HD Fishing System uses a 200/83 kHz DualBeam PLUS™ sonar system with a wide (60°) area of coverage. DualBeam PLUS™ sonar has a narrowly focused 20° center beam, surrounded by a second beam of 60°, expanding your coverage to an area equal to your depth. In 20 feet of water, the wider beam covers an area 20 feet wide.
DualBeam PLUS™ sonar returns can be blended together, viewed separately, or compared side­by-side. DualBeam PLUS™ is ideal for a wide range of conditions - from shallow to very deep water in both fresh and salt water. Depth capability is affected by such factors as boat speed, wave action, bottom hardness, water conditions and transducer installation.
How Sonar Works
4

Down Imaging™ Sonar

75 Degree Total Coverage
16°
75°
25°
455kHz
200kHz
455kHz
45°
800kHz
(Down Imaging™ models only
[788ci HD DI, XNT 9-DI-T Transducer])
Your 788ci HD DI Fishing System uses Down Imaging™ technology. The Down Imaging™ transducer scans the water with razor-thin, high-definition beams. The beams are wide (side to side) but very thin front to back.
The Down Imaging™ beams can be operated at two frequencies: 455 kHz (75°) or 800 kHz (45°). Select 455 kHz for the best overall image quality and depth. Select 800 kHz for the sharpest image. See
Down Imaging™ X-Press™ Menu: Imaging Frequency for more information.
The transducer also uses conical beams to provide data in traditional 2D format (see What’s on the Sonar View). Select 455 kHz for a narrowly focused 16° center beam, or select 200 kHz for a wider 25° beam (see Sonar Menu Tab: Beam Select).
Depth capability is affected by such factors as boat speed, wave action, bottom hardness, water conditions and transducer installation.
5
How Sonar Works
Ice transducer

Dual Beam Ice Transducer

(optional-purchase XI 9 20 Ice Transducer only)
Your Fishing System supports the optional­purchase XI 9 20 Ice Transducer which provides selectable dual-frequency sonar with a wide area of coverage. Selectable dual-frequency gives you the option of two beams, and both beams will cover the bottom and provide high definition. The 20° center beam provides the highest definition, while the 60° beam provides wider coverage. Depth capability is affected by such factors as bottom hardness and water conditions. Whether fishing in shallow or very deep water, selectable dual-frequency is ideal for a variety of conditions.
How Sonar Works
6

QuadraBeam PLUS™ Sonar

90° Total Coverage
Bottom Coverage =
2 x Depth
35° 60° 20° 35°
455 kHz 455 kHz
83 kHz
200 kHz
(with optional-purchase QuadraBeam PLUS™ transducer)
Your Fishing System also supports QuadraBeam PLUS™ sonar with the purchase of an additional QuadraBeam PLUS™ transducer. QuadraBeam PLUS™ sonar provides an extremely wide 90° area of coverage. QuadraBeam PLUS™ starts with two fan-shaped 35° 455 kHz Side Structure locating sonar beams to spot fish, bait, and structure to the left and right of the boat over an area of the bottom that’s always equal to twice your depth. For a detailed view below the boat, QuadraBeam PLUS™ uses DualBeam PLUS™ technology, with precision 20° and wide 60° beams. QuadraBeam PLUS™ finds more fish faster and can even tell you where to put your bait by showing if fish are to the left, right, or directly beneath your boat.
7
How Sonar Works

WideSide® Sonar

(with optional-purchase WideSide®
transducer)
Your Fishing System also supports WideSide® sonar with the purchase of an additional WideSide® transducer. The WideSide® transducer is a specialized "side-looking" transducer that is extremely useful for bank fishing or looking for bait fish in open water. The WideSide® transducer uses three different sonar elements that transmit signals to the left, right, and straight down from your boat. The downward beam is 200 kHz with a 24° area of coverage. This beam maintains a continuous digital depth readout from the bottom directly beneath your boat. The side beams are 455 kHz with a 16° area of coverage. The side-looking elements can be used independently or together to locate targets near the surface of the water on either side of your boat.

Universal Sonar 2

(compatible w/ optional-purchase Minnkota trolling motors)
Your 700 Series™ Fishing System supports Universal Sonar 2, a state-of-the­art, integrated and protected transducer that is built into the lower unit of Minnkota trolling motors. With Universal Sonar 2, all wiring is concealed inside the indestructible composite shaft—out of sight and out of harm’s way, with no clamps, ties, or exposed wires. Universal Sonar 2 features new temperature sensing and the performance of DualBeam PLUS™ technology (available with all Humminbird® DualBeam PLUS™ models). An expanded view and greater bottom detail gives you a totally new perspective of the water below, along with optimal sonar performance to help you find fish.
How Sonar Works
8

How GPS Works

Your 700 Series™ Fishing System also supports GPS (Global Positioning System) and chartplotting. It uses GPS and sonar to determine your position, display it on a grid, and provide detailed underwater information.
GPS uses a constellation of satellites that continually send radio signals to the earth. The GPS receiver on your boat receives signals from satellites that are visible to it. Based on time differences between each received signal, the GPS receiver determines its distance to each satellite. With distances known, the GPS receiver mathematically triangulates its own position. With once per second updates, the GPS receiver then calculates its velocity and bearing.
GPS was originally intended for military use; however, civilians may also take advantage of its highly accurate position capabilities, typically within +/- 4.5 meters, depending on conditions. This means that 95% of the time, the GPS receiver will read a location within 4.5 meters of your actual position. Your GPS Receiver also uses information from WAAS (the Wide Area Augmentation System), EGNOS (the European Geostationary Navigation Overlay Service), and MSAS (the MTSAT Satellite Augmentation System) satellites if they are available in your area.
The following GPS functionality is currently supported by the 700 Series™ Fishing System when it is connected to the included GPS receiver:
• View current position
• View current track (breadcrumb trail)
• View precision speed and heading from your GPS receiver
• Save tracks, waypoints, and routes
• Travel a route and navigate from one waypoint to the next
See Chart View and Add Maps to Your Fishing System for more information.
9
How GPS Works

What’s on the Sonar Display

The 700 Series™ Fishing System can display a variety of useful information about
Depth - Water depth can be set to alarm when the water becomes too shallow.
Temperature - Water surface temperature.
Timer - Elapsed time with Temp/Speed
Accessory or GPS Receiver.
Distance - Distance traveled with Temp/Speed Accessory or GPS Receiver.
Average Speed - Average speed reading with Temp/Speed Accessory or GPS Receiver.
Speed - if a Temp/Speed accessory or GPS Receiver is attached, the Fishing System 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 the display and the depth of the bottom directly below the cursor. The Latitude and Longitude of the cursor position, the distance to travel to the cursor position, and the bearing to the cursor position is shown with a GPS receiver. A waypoint can be marked at the cursor position for later retrieval and use with a 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.
What’s on the Sonar Display
10
High Sonar Intensity Return
Thermoclines - Layers of water with different
temperatures that appear at different depths and different times of the year. A thermocline typically appears as a continuous band of many colors moving across the display at the same depth.
Bait Ball
Fish - The Fishing System displays fish as arches
and/or fish icons, and can be set to alarm when a fish of a certain size is detected. When a target is detected, a Fish ID+™ symbol appears on the display with the depth displayed above it. The size of the symbol indicates the intensity of the sonar return. The unit will clearly show schools of Bait Fish as "clouds" of different shapes and sizes, depending on the number of fish and boat speed.
Structure - Where fish may be hiding.
Cursor - Available in Freeze Frame and can
be positioned in the Sonar View to provide depth of a sonar return and bottom depth below the cursor.
RTS (Real Time Sonar) Window™
Low Sonar Intensity Return
11
What’s on the Sonar Display

Understanding the Sonar Display

It is important to understand the significance of the display. The display does not show a literal 3­dimensional representation of what is under the water. Each vertical band of data received by the control head and plotted on the display represents something that was detected by a sonar return at a particular time. As both the boat and the targets (fish) may be moving, the returns are only showing a particular segment of time when objects were detected, not exactly where those objects are in relation to other objects shown on the display.
The returned sonar echoes are displayed on the screen. As a new echo is received, the historical data scrolls across the screen.

Real Time Sonar (RTS™) Window

A Real Time Sonar (RTS™) Window appears on the right side of the display in the Sonar View only. The RTS Window™ updates at the fastest rate possible for depth conditions and shows only the returns from the bottom, structure, and fish that are within the transducer beam. The RTS Window™ plots the depth and intensity of a sonar return (see Sonar Menu Tab: RTS Window™).
The Narrow RTS Window™ indicates the sonar intensity through the use of colors. Red indicates a strong return and blue indicates a weak return. The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale.
What’s on the Sonar Display
The Wide RTS Window™ indicates the sonar intensity through the use of a bar graph. The length of the plotted return indicates whether the return is weak or strong. The depth of the sonar return is indicated by the vertical placement of the return on the display depth scale. The Wide RTS Window™ does not use grayscale.
12

SwitchFire™

SwitchFire™ controls how the sonar returns are displayed in the Sonar Views. SwitchFire™ settings are available in the Sonar Menu Tab.
To see the maximum sonar information available within the transducer beam so more fish arches and better jig tracking are shown, choose Max Mode.
To see less clutter and more fish size accuracy interpreted from the transducer beam, choose Clear Mode. See Sonar Menu Tab: SwitchFire™ for more information.

Freeze Frame and Active Cursor

Freeze Frame and Active Cursor - Press any arrow on the 4-WAY Cursor Control key, and the screen will freeze and a cursor will be displayed. Use the 4-WAY Cursor Control key to move the cursor over a sonar return, and the depth of the sonar return will be displayed at the bottom of the screen in the cursor dialog box.
The RTS Window™ continues to update in Freeze Frame. To return to a scrolling display and exit Freeze Frame, press the EXIT key. Freeze Frame is available in the Sonar, Split Sonar, and Sonar Zoom Views.

Instant Image Update

Instant Image Update - You can change a variety of sonar menu settings (such as Sensitivity or Upper Range), and the adjustments will be shown instantly on the screen.
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What’s on the Sonar Display

Bottom Presentation

As the boat moves, the unit charts the changes in depth on the display to create a profile of the Bottom Contour. The type of bottom can be determined from the return charted on the display. A Hard Bottom such as compacted sediment or flat rock appears as a thinner line across the display. A Soft Bottom such as mud or sand appears as a thicker line across the display. Rocky Bottoms have a broken, random appearance.
Bottom Contour Profile with RTS Window™
Hard Bottom
Rocky Bottom
Soft Bottom
The sonar returns from the bottom, structure, and fish can be represented as either WhiteLine™ or Structure ID®. See Sonar Menu Tab: Bottom View for details on how to set the bottom view.
What’s on the Sonar Display
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Structure ID® represents weak returns in blue and strong returns in red.
WhiteLine™ highlights the strongest sonar returns in white, resulting in a
distinctive outline. This has the benefit of clearly defining the bottom on the display.
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What’s on the Sonar Display
What’s on the Down Imaging™ Display
Down Imaging™ uses its unique transducer and sonar technology to provide definition profiling beams produce the detailed sonar data that you see on the can interpret the structure and bottom contour, including the following items:
Depth - (water depth) can be set to alarm when the water becomes too shallow.
Temperature - Water surface temperature.
Bottom Return- Use the appearance of the bottom
return to determine bottom hardness. Rock and gravel provide a clearer sonar return than mud and sand because hard objects reflect sonar better than soft objects.
Topography Changes - The light part of the display shows where the beam is hitting hard bottom or rising terrain. The dark part of the display indicates soft bottom (sand, mud) or descending terrain.
Speed - If a GPS Receiver or Temp/Speed accessory is connected, the Fishing System can display the speed of the boat and can keep a Triplog of nautical or statute miles traveled.
NOTE: Entries in this view that list (with Temp/Speed or GPS Receiver) are available if either only the information from the GPS receiver will be displayed on the view.

What’s on the Down Imaging™ Display

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Upper Range
Clouded Area may indicate a bait ball and White Streaks may indicate fish.
Shadows- Result from a lack of reflected sonar
from a particular area and can be as 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.
Structure
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Lower Range
What’s on the Down Imaging™ Display

Understanding the Down Imaging™ Display

The images you see on the Down Imaging™ display are produced using sonar technology. Each time the unit pings, a strip of data representing all the echoes received by the transducer are put together on the display to form the image that you see. Like traditional 2D Sonar, the sonar history scrolls left across the screen.

Interpreting the Display

Down Imaging™ beams “illuminate” the bottom contour, structure, and fish. The beams are wide (side to side) but very thin front to back.
Use the light and dark parts of the display to interpret the objects under your boat as follows:
• Dark shades represent soft returns (mud, sand) or descending terrain.
• Light shades represent denser terrain (timber, rocks) or rising terrain. A very hard bottom may appear as white on the display.
• White Streaks or Clouds may represent fish on the display.
• Shadows are not caused by light but by the lack of a sonar return. Objects standing on the bottom cause a sonar shadow to appear on the display. The longer the shadow, the taller the object. Fish may also cast shadows. You can use the shadow to interpret where the fish or object is located in relation to the bottom.
What’s on the Down Imaging™ Display
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