Table of Contents
Advertisement
Advertisement
Table of Contents
Related Manuals for Humminbird 748 3D
Summary of Contents for Humminbird 748 3D
- Page 1 748 3D Operations Manual 531879-1EN_A...
- Page 2 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.
- Page 3 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;...
-
Page 4: Table Of Contents
Table of Contents Power On the Unit How Sonar Works 3D Sonar ........................4 2D Sonar ........................5 What’s on the 3D Sonar Display What’s on the 2D Sonar Display Understanding the 2D Sonar Display ..............10 Real Time Sonar (RTS™) Window ................10 SwitchFire™... - Page 5 Table of Contents Start-Up Options Menu Normal........................29 Simulator ........................ 30 System Status ......................30 Self Test........................31 Accessory Test......................31 PC Connect ......................32 X-Press™ Menu Main Menu Quick Tips for the Main Menu .................. 35 Note for all Menu Settings..................35 User Mode ................
- Page 6 Table of Contents Sonar Menu Tab 3D Bottom Style ..............48 (3D Sonar Views only) 3D Frame Style ................ 48 (3D Sonar Views only) 2D Beam Select......................48 Surface Clutter ......................49 SwitchFire™ ......................49 Fish ID+™ ........................ 50 Fish ID Sensitivity ....................51 Fish ID 3D Reference ..............
- Page 7 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.
-
Page 9: Power On The Unit
Power On Follow the instructions below to power on your Humminbird® control head. 748 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... -
Page 10: How Sonar Works
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;... - Page 11 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.
-
Page 12: 3D Sonar
3D Sonar Your Fishing System uses a six- element transducer that transmits at 455 kHz and is capable of reaching depths of 240 ft (75 m). Each transmitted beam is symmetrical and 16 degrees in width. The six beams are lined up next to each other to provide a total coverage of 53 degrees from side to side, and 16 degrees from front to back. -
Page 13: Sonar
2D Sonar Your Fishing System also has the capability of displaying traditional 2-dimensional sonar information from either a 455 kHz beam or an 83 kHz beam. The 455 kHz single beam has the advantage of providing increased sonar resolution but is limited to a depth capability of 240 ft (75 m). -
Page 14: What's On The 3D Sonar Display
What’s on the 3D Sonar Display In 3D views, your Fishing System can display a variety of useful information Depth - Water depth can be set to alarm when the water becomes too shallow. Temperature - Water surface temperature. Bottom Contour - Shows the shape of the bottom derived from depth measurements on 6 beams. - Page 15 about the area under and adjacent to your boat, including the following items: Boat/Direction Arrow - A simple, solid 3D boat is drawn when the Upper Depth Range is 0. A solid 3D arrow is drawn when the Upper Depth Range is not 0. Upper and Lower Depth Range Fish ID+™...
-
Page 16: What's On The 2D Sonar Display
What’s on the 2D Sonar Display The 700 Series™ Fishing System can display a variety of useful information Depth - Water depth can be set to alarm when the water becomes too shallow. Speed - If a Temp/Speed accessory is attached, the Fishing System can display the speed of the boat and can keep a Triplog of nautical or statute miles traveled. - Page 17 about the area under your boat, including the following items: Bait Ball Hollow Fish Symbol (see Fish ID+™) 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 gray levels moving across the display at the same depth.
-
Page 18: Understanding The 2D Sonar Display
Understanding the 2D Sonar Display It is important to understand the significance of the display. The display does not show a literal 3-dimensional 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. -
Page 19: Switchfire
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. -
Page 20: Bottom Presentation
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. - Page 21 Inverse is a method where weak returns are shown with dark pixels and strong returns with lighter pixels. This has the benefit of ensuring that weak signals will be clearly visible on the display. Structure ID® represents weak returns as light pixels and strong returns as dark pixels.
-
Page 22: Views
Views The sonar information from your Fishing System is displayed on the screen in a variety of easy-to-read views. • Default View: When you first power up the control head, 2D Sonar View will be the default view. • Cycle: When you press the VIEW key repeatedly, the display cycles through the available views on your screen. - Page 23 To customize your view rotation: 1. Press the MENU key twice to access the tabbed Main Menu, then press the RIGHT Cursor key until the Views tab is selected. 2. Press the UP or DOWN Cursor keys to select a View. 3.
-
Page 24: 3D Sonar View
3D Sonar View 3D Sonar View displays a 3-dimensional representation of the bottom. The sonar returns from each of the six elements are combined to create this 3- dimensional, wire-frame image. This graphic depiction of the bottom provides you with an effective tool for understanding the terrain beneath the boat. •... - Page 25 3D Sonar View Boat Icon Depth Upper Temperature Depth Range Reference Frame Triplog with Fish ID+™ Timer, Symbols Distance Travelled, 3D Bottom and Average Contour Speed Lower Speed Depth Range Voltage To change the selected perspective: In some situations, the 3D Sonar View and the 2D/3D Sonar View may not display certain information due to the slope of the terrain.
-
Page 26: Sonar View
2D Sonar View Sonar View presents a 2-dimensional historical log of sonar returns. The most recent sonar returns are charted on the right side of the display. As new information is received, the historical information scrolls left across the display. •... -
Page 27: 2D/3D Sonar Combo View
2D/3D Sonar Combo View 2D/3D Sonar Combo View displays a 3-dimensional representation of the bottom next to the traditional 2-dimensional sonar representation. The 2D/3D Sonar Combo View is especially useful for evaluating the bottom terrain from the 3D window while simultaneously viewing the 2D window for structure and bottom hardness. -
Page 28: 6-Beam Sonar View
6-Beam Sonar View 6-Beam Sonar View displays information from each of the six 455 kHz beams in a traditional 2D representation. This view displays the raw sonar returns from each of the beams that are used to create the 3-dimensional wire frame representation of the bottom in the 3D Sonar View. -
Page 29: 2D Zoom View
2D Zoom View 2D Zoom View provides a magnified view of the bottom and structure. The Sonar Zoom View makes it easier to see separate sonar returns that would usually be displayed close together, such as those caused by fish suspended close to the bottom or within structure. -
Page 30: 2D Big Digits View
2D Big Digits View Big Digits View provides digital data in a large, easy-to-see format. • Digital Readouts: Depth is always displayed. Readouts for temperature, speed, and Triplog information are displayed automatically if the appropriate accessory is connected to the Fishing System. NOTE: The digital readouts in the Big Digits View cannot be customized. -
Page 31: What's On The 700 Series™ Control Head
What’s on the 700 Series™ Control Head Your 700 Series™ Fishing System interface is easy to use. A combination of keys and special features allows you to control what you see on the display. Refer to the following illustration, and see Key Functions for more information. Screen MENU key EXIT key... -
Page 32: Key Functions
Key Functions Your Fishing System user interface consists of a set of easy-to-use keys that work with various on-screen views and menus to give you flexibility and control over your fishing experience. POWER/LIGHT Key The POWER/LIGHT key is used to power the Fishing System on and off. -
Page 33: View Key
VIEW Key The VIEW key is used to cycle through all available views. Press the VIEW key to advance to the next view. Repeatedly pressing VIEW cycles through all views available. Views can be hidden to optimize the system to your fishing requirements (see Views and Views Menu Tab). -
Page 34: Exit Key
EXIT Key The EXIT key has multiple functions, which depend on the situation: • If an alarm is sounding, press the EXIT key to cancel the alarm. • If a menu tab is selected, press the EXIT key to exit the menu mode and return to the view. -
Page 35: Accessory Bus
NOTE: Accessories to enable WeatherSense®, SmartCast® Wireless Sonar Link , and GPS functionality require separate purchases. Visit our Web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468 for details. Accessory Bus... -
Page 36: The Menu System
The Menu System The Menu System is divided into easy-to-use menu modules as follows: • Start-Up Options Menu: Press the MENU key during the power on sequence to view the Start-Up Options Menu. From the Start-Up Options Menu, you can choose the following Fishing System Modes: Normal, Simulator, System Status, and PC Connect. -
Page 37: Start-Up Options Menu
Start-Up Options Menu Press the MENU key during the power on sequence to view the Start-Up Options Menu, and select one of the modes described on the following pages. Also, see Power On for additional information. Normal Use Normal for on-the-water operation with a transducer connected. 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. -
Page 38: Simulator
Simulator Use Simulator to learn how to use your Fishing System before taking your boat on the water. The Simulator is a very powerful tool that provides a randomly-updated display which simulates on the water operation. Simulator We recommend going through this manual while using the Simulator, since all of the menus function and affect the display in the same way as... -
Page 39: Self Test
Self Test displays results from the internal diagnostic self test, including unit serial number, Printed Circuit Board (PCB) serial number, software revision, total hours of operation, and the input voltage. Self Test Screen Accessory Test lists the accessories connected to the system. System Status Accessory Test Screen NOTE: The speed accessory will be detected only if the paddlewheel has moved since your Fishing System was powered up. -
Page 40: Pc Connect
Internet access, you will need a PC Connect Cable (AS PC2). NOTE: The PC Connect cable requires a separate purchase. For more information, visit our Web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468. Updating Software requires the following top-level steps: 1. -
Page 41: X-Press™ Menu
X-Press™ Menu The X-Press™ Menu provides a shortcut to your most frequently-used settings. The options provided on the X-Press™ Menu correspond with the current view. For example, if you are in a Sonar View and press the MENU key once, the Sonar X-Press™... -
Page 42: Main Menu
Main Menu The Main Menu provides the standard set of menu options, including the settings that are changed less frequently. The Main Menu is organized under the following tabs to help you find a specific menu item quickly: Alarms, Sonar, Setup, Views, and Accessories. NOTE: Menu options can be expanded or simplified by setting the User Mode to Advanced or Normal. -
Page 43: Quick Tips For The Main Menu
Quick Tips for the Main Menu • From any menu option on a menu tab, press the EXIT key to jump directly to the top of the tab. • From the bottom of a menu tab, press the DOWN Cursor key to jump directly to the top of the tab. -
Page 44: User Mode (Normal Or Advanced)
User Mode (Normal or Advanced) Menu options can be simplified or expanded by setting your Fishing System User Mode to Normal or Advanced. Normal Mode is the default setting when you first power on your 700 Series™ Fishing System. Normal mode is provided for users who want greater simplicity and fewer menu choices. - Page 45 Sonar Tab, Normal Mode Sonar Tab, Advanced Mode Main Menu...
-
Page 46: (Sonar X-Press™ Menu
Sonar X-Press™ Menu (Sonar Views only) The Sonar X-Press™ Menu provides a shortcut to your most frequently-used settings. Press the MENU key once while in any of the Sonar Views to access the Sonar X-Press ™ Menu. NOTE: Menu options will vary with the view (2D, 3D, 6-Beam, 2D Zoom View, or Combo View). -
Page 47: Bottom Zoom (3D Sonar, 3D/2D Sonar Combo Views Only)
3D Bottom Zoom (3D Sonar, 3D/2D Sonar Combo Views only) Off, 1.5x, 2x, 2.5x, 3x; Default = Off Settings: 3D Bottom Zoom provides a magnified image of the bottom. Use 3D Bottom Zoom to increase the detail of the bottom on the display. 3D Lower Range (3D Sonar, 3D/2D Sonar Combo, 6-Beam Sonar Views only) -
Page 48: Sonar Window (3D/2D Sonar Combo View Only)
2D Sonar Window (3D/2D Sonar Combo View only) Settings: Wide, Medium, Narrow, Default = Medium 2D Sonar Window sets the width of the 2-dimensional Sonar Window in the 3D/2D Combo View. See Views for more information. Reset View (3D Sonar, 3D/2D Sonar Combo Views only) Settings: Press the RIGHT Cursor key to activate. -
Page 49: Sensitivity (2D Sonar, 2D Sonar Zoom, 2D Big Digits Views Only)
Sensitivity (2D Sonar, 2D Sonar Zoom, 2D Big Digits Views only) Settings: Low = 1, High = 20, Default = 10 Sensitivity controls how much detail is shown on the display and will adjust the sensitivity of all sonar frequencies. When operating in very clear water or greater depths, increase the sensitivity to see weaker returns that may be of interest. -
Page 50: Upper Range (Advanced: 2D Sonar, 2D Big Digits Views Only)
Upper Range (Advanced: 2D Sonar, 2D Big Digits Views only) Settings: 0 to 990 ft or 0 to 327 m [International Models only], Default = 0 ft Upper Range sets the shallowest depth range that will be displayed on the Sonar and Big Digits Views. -
Page 51: Chart Speed (2D Sonar, 2D Sonar Zoom, 2D Big Digits Views Only)
Chart Speed (2D Sonar, 2D Sonar Zoom, 2D Big Digits Views Only) Settings: 1-9, Ultra, where 1 = Slow, 9 = Fast, Ultra = Fastest, Default = 5 Chart Speed determines the speed at which the sonar information moves across the display, and consequently the amount of detail shown. -
Page 52: Alarms Menu Tab
Alarms Menu Tab From any view, press the MENU key twice to access the Main Menu. The Alarms tab will be the default selection. NOTE: When an alarm is triggered, you can silence it by pressing any key. The alarm will be silenced, and will not be triggered again until a new instance of the alarm condition is detected. -
Page 53: Depth Alarm
Depth Alarm Settings: Off, 1 to 100 ft, or 0.5 to 30 m [International Models only], Default = Off Depth Alarm sounds when the depth becomes equal to or less than the menu setting. Fish ID Alarm Settings: Off, All, Large/Medium, Large, Default = Off Fish ID Alarm sounds when the Fishing System detects fish that correspond to the alarm setting. -
Page 54: Temp. Alarm
Temp. Alarm Settings: Off, 33-120 Fahrenheit, 0-50 Celsius [International Models only]; Default = Off Temp. Alarm sounds when the water temperature detected by the Fishing System reaches the Temp. Alarm setting, which is either set in degrees Fahrenheit or Celsius [International Models only]. For example, if the Temp. -
Page 55: Sonar Menu Tab
Sonar Menu Tab Press the MENU key twice to access the Main Menu and then press the RIGHT Cursor key until the Sonar tab is selected. NOTE: Menu options can be expanded or simplified by setting the User Mode to Advanced or Normal. See Main Menu: User Mode for details. -
Page 56: Bottom Style (3D Sonar Views Only)
3D Bottom Style (3D Sonar Views only) Settings: Grid Only, Shaded with Grid, Shaded, Default = Shaded with Grid 3D Bottom Style selects the bottom style used in the 3D Sonar View. 3D Frame Style (3D Sonar Views only) Settings: Simple, 2, 3, 4, Complex, Default = 3 3D Frame Style selects the frame style used in the 3D Sonar View. -
Page 57: Surface Clutter
Surface Clutter Settings: Low = 1 to High = 10, Default = 5 Surface Clutter adjusts the filter that removes surface clutter noise caused by algae and aeration. The lower the setting, the less surface clutter will be displayed. Surface Clutter Surface Clutter SwitchFire™... -
Page 58: Fish Id
Fish ID+™ Settings: Off, 3D Markers, Symbol Only, Symbol + Depth, Default = Symbol + Depth Fish ID+™ uses advanced signal processing to interpret sonar returns and will display a Fish Symbol when very selective requirements are met. When a fish is detected, a fish icon and its depth are displayed above the return that has been classified as being a fish. -
Page 59: Fish Id Sensitivity
When Fish ID+™ is turned off, the Fishing System shows only the raw sonar returns on the display. These returns will often result in “arches“ forming on the display, indicating potential targets. Due to the transducer beam angle, the distance to a fish decreases as the fish moves into the beam, and then increases as it moves out again, creating a Fish Arch when this distance change is shown on the display. -
Page 60: Fish Id 3D Reference (3D Sonar Views Only)
Fish ID 3D Reference (3D Sonar Views only) Settings: Surface, Both, Bottom, Default = Bottom Fish ID 3D Reference selects the reference line style used in the 3D Sonar View. Selecting Surface draws a line from the fish icon to the surface plane. Bottom draws a line from the fish icon to the bottom contour;... -
Page 61: 83 Khz Sensitivity (Advanced, 2D Sonar Views Only)
83 kHz Sensitivity (Advanced, 2D Sonar Views only) Settings: -10 to +10, Default = 0 83 kHz Sensitivity changes the sensitivity of the 83 kHz beam. Increasing the 83 kHz Sensitivity will display additional weak returns, and decreasing the 83 kHz Sensitivity will display fewer weak returns. -
Page 62: Noise Filter (Advanced)
Noise Filter (Advanced) Settings: Off, Low, Medium, High 1, High 2, High 3, Default = Low Noise Filter adjusts the sonar Noise Filter to limit interference on the display from sources such as your boat engine, turbulence, or other sonar devices. The Off setting removes all filtering. -
Page 63: Setup Menu Tab
Setup Menu Tab From any view, press the MENU key twice to access the tabbed Main Menu, then press the RIGHT Cursor key until the Setup tab is selected. NOTE: Menu options will vary depending on which accessories are attached to the unit. NOTE: Menu options can be expanded or simplified by setting the User Mode to Advanced or Normal. -
Page 64: Units - Depth
Units - Depth Settings: Domestic Models: Feet, Fathoms; International Models: Meters; Default = Feet/Meters Units - Depth selects the units of measure for all depth-related readouts. Units - Temp (International only) Settings: Celsius, Fahrenheit; Default = Celsius Units - Temp selects the units of measure for all temperature-related readouts. [International Models only]. -
Page 65: User Mode
User Mode Settings: Normal, Advanced, Default = Normal User Mode sets the menu system to Normal or Advanced. When set to Normal (default setting), the basic set of menu options are shown in the menu system. When set to Advanced, additional menu options are added to the menu system. See Main Menu: User Mode for details. -
Page 66: Select Readouts (Advanced, 2D Sonar And 3D Sonar Views Only)
Select Readouts (Advanced, 2D Sonar and 3D Sonar Views only) Settings: Various, Default = Off Select Readouts sets the information to display in each of the 6 fixed-position data windows The readout arranged around the left and bottom edges of position on the screen the 2D or 3D Sonar Views. -
Page 67: Depth Offset (Advanced)
Depth Offset (Advanced) Settings: -10.0 to +10.0 ft or -3.0 to 3.0 m [International Models only], Default = 0.0 ft Depth Offset will adjust the digital depth readout to indicate depth from the waterline or boat's keel. Enter a positive vertical measurement from the transducer to the waterline to read the depth from the waterline. -
Page 68: Nmea Output (Advanced)
NMEA Output (Advanced) Settings: Off, On; Default = Off NMEA Output turns the NMEA* output on or off. NMEA Output should be turned On if you connect the NMEA Output wires of the GPS Receiver cable to another NMEA-compatible device, such as an autopilot. *NMEA 0183 is a National Marine Electronics Association standard for data communication. -
Page 69: Speed Calibration (Advanced, With Temp/Speed Only)
Speed Calibration (Advanced, with Temp/Speed only) Settings: -20% to +20%, Default = 0% Speed Calibration will adjust the speed readout by the percentage entered, and will appear in the menu if a Temp/Speed Accessory is connected and the paddlewheel has moved at least once. Demonstration Settings: Off, Visible, Default = Visible Demonstration controls whether the Demonstration Mode is visible or off. -
Page 70: Views Menu Tab
Views Menu Tab From any view, press the MENU key twice to access the tabbed Main Menu, then press the RIGHT Cursor key until the Views tab is selected. This menu tab allows you to set the available views to either hidden or visible in the view rotation. -
Page 71: Accessories Menu Tab
Accessories Menu Tab (with accessories attached) NOTE: Accessories to enable WeatherSense® and the SmartCast® Wireless Sonar Link require separate purchases. You can visit our Web site at humminbird.com or contact our Customer Resource Center at 1-800-633-1468 for additional details. Accessories Menu Tab... -
Page 72: Troubleshooting
Troubleshooting Before contacting the Humminbird® Customer Resource Center, please read the following section. Taking the time to review these troubleshooting guidelines may allow you to solve a performance problem yourself, and therefore avoid sending your unit back for repair. Fishing System Doesn’t Power Up If your Fishing System doesn’t power up, use the Installation Guide that also... -
Page 73: Display Problems
Display Problems There are several main conditions or sources of possible interference that may cause problems with the quality of the information displayed on the control head. Look in the following table for some symptoms of display problems and possible solutions: Problem Possible Cause The control head loses... -
Page 74: Finding The Cause Of Noise
Finding the Cause of Noise Electrical noise usually affects the display with many black dots at high speeds, and high sensitivity readings. One or more of the following sources can cause noise or interference: Possible Source of Noise Isolation Turn off any nearby electronic devices to see Other electronic devices if the problem goes away, then turn them on one at a time to see if the noise re-appears. -
Page 75: 700 Series™ Fishing System Accessories
700 Series™ Fishing System Accessories Accessories customize the Humminbird® Fishing System to your needs and enable you to stay on the edge of new technology. When an accessory is connected to the Humminbird® Fishing System, additional menus and readouts are added automatically to the Main Menu System. Accessories available today that are supported by your Humminbird®... -
Page 76: Specifications
IPX Rating ..IP67 Waterproof/Submersible @ 1 m for 30 minutes and dust tight NOTE: Humminbird® verifies maximum stated depth in saltwater conditions, but actual depth performance may vary due to transducer installation, water type, thermal layers, bottom composition and slope. -
Page 77: Glossary
Fish and other objects close to the bottom that fall within the dead zone will probably not be visible in the sonar beam. Precision sonar beams, such as the Humminbird® 20° beam, have a smaller dead zone than wider sonar beams. - Page 78 Noise appears as random “dots“ on the display and is caused by a variety of sources. Many Humminbird® products have a Noise Filter menu setting that allows the user to clear the screen of noise that is difficult to eliminate (also, see Troubleshooting).
- Page 79 Many Humminbird® units operate at up to 40 times per second when in single frequency operation. Due to the limitation of the speed of sound in water, the update rate begins to slow as depth increases to deeper than 50 feet.
- Page 80 Thermoclines Water layer(s) of distinctly different temperatures that create a sonar reflection due to the density of the differing water temperatures. Typically a thermocline will appear as a continuous band across the display at some distance above the bottom contour. Thermoclines are of interest to anglers because fish will suspend above or below the thermocline as they seek the optimum temperature and oxygen levels.
-
Page 81: Contact Humminbird
Contact Humminbird® Contact the Humminbird® Customer Resource Center in any of the following ways: By Telephone: (Monday - Friday 8:00 a.m. to 4:30 p.m. Central Standard Time): 1-800-633-1468 By e-mail: (typically we respond to your e-mail within three business days): service@humminbird.com...