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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-ye
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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 i
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Table of Contents Power On 1 How Sonar Works 2 DualBeam PLUS™ Sonar (DualBeam PLUS™ models only [345c])................................ 4 Down Imaging™ Sonar (Down Imaging™ models only [345c DI]) ................................ 5 Dual Beam Ice Transducer (optional-purchase XI 9 20 Ice Transducer only) .................. 6 What’s on the Sonar Display 7 Understanding the Sonar Display .......................................................................... 9 Real Time Sonar (RTS™) Window ......
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Table of Contents What’s on the 300 Series™ Control Head 30 Key Functions 31 POWER/LIGHT Key .............................................................................................. 31 VIEW Key .............................................................................................................. 31 MENU Key ............................................................................................................ 32 4-WAY Cursor Control Key ........................................
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Table of Contents Zoom Level (Sonar Zoom View only) .......................................................................... 46 Bottom Lock (Sonar Zoom View only) ........................................................................ 46 Bottom Range (Sonar Zoom View only when Bottom Lock is On) .................................. 47 Down Imaging™ X-Press™ Menu (Down Imaging™ Views only [345c DI]) 48 Imaging Sensitivity ..........................................................................
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Table of Contents Surface Clutter ...................................................................................................... 61 SwitchFire™ .......................................................................................................... 61 Fish ID+™ .............................................................................................................. 62 Fish ID Sensitivity ..............................................................................................
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Table of Contents Select Readouts (Advanced, Sonar View and Down Imaging™ View only)...................... 72 Depth Offset (Advanced)............................................................................................ 73 Temp. Offset (Advanced) ............................................................................................ 73 Digits Format (Advanced) ............................................................................................74 Speed Calibration (Advanced, wi
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Table of Contents 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
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Power On Follow the instructions below to power on your Humminbird® control head. 345c 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 conne
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How Sonar Works Sonar technology is based on sound waves. The 300 Series™ Fishfinder uses sonar to locate and define structure, bottom contour and composition, as well as depth directly below the transducer. Your 300 Series™ Fishfinder 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. S
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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
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DualBeam PLUS™ Sonar (DualBeam PLUS™ models only [345c]) Your 345c Fishfinder 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 side- by-side. DualBeam PLUS™ is idea
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Down Imaging™ Sonar (Down Imaging™ models only [345c DI]) Your 345c DI Fishfinder uses Down Imaging™ technology. The Down Imaging™ transducer scans the water with razor-thin, 45° 800kHz high-definition beams. The beams are wide 75° 455kHz (side to side) but very thin front to back. 16° 455kHz The Down Imaging™ beams can be operated 25° 200kHz at two frequencies: 455 kHz (75°) or 800 kHz (45°). Select 455 kHz for the best overall 75 Degree Total Coverage image quality and depth. Select 800 kHz fo
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Dual Beam Ice Transducer Ice transducer (optional-purchase XI 9 20 Ice Transducer only) Your Fishfinder supports the optional- purchase 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 degree center beam provides the highest definition, while the 60 degree beam provides wider coverage. Depth capability is affected
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What’s on the Sonar Display The 300 Series™ Fishfinder 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. Distance - Distance traveled with Temp/Speed Accessory. Average Speed - Average speed reading with Temp/Speed Accessory. Speed - If a Temp/Speed accessory is attached, the Fishfinder can display the speed of the boat and can keep
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the area under your boat, including the following items: High Sonar Intensity Return Bait Ball Fish - The Fishfinder 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
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Understanding the 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. 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 exact
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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 & Ac
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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™ Rocky Bottom Soft Bot
