Eagle Electronics 640c manual Chart Speed

Page 66

Chart Speed

The rate that echoes scroll across the screen is called the chart speed. The default is maximum. We recommend you leave the speed set at de- fault for virtually all fishing conditions.

However, you might consider experimenting with chart speed when you are stationary or drifting very slowly. You may sometimes achieve bet- ter images as you slow down the chart speed to match how fast you are moving.

If you are at anchor, ice fishing or fishing from a dock, experiment with a chart speed around 50 percent. If you are drifting slowly, try a chart speed around 75 percent. When you are stationary and a fish swims through the sonar signal cone, the image appears on the screen as a long line instead of a fish arch. Reducing the chart speed may result in a shorter line that more closely resembles a regular fish return.

Sonar Page menu (left) with Chart Speed command selected.

The Chart Speed control bar is shown at right.

If you experiment with chart speed remember to reset it to maximum when you resume trolling or moving across the water at higher speeds. To change chart speed:

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Contents Installation and Operation Instructions Page Table of Contents Basic Sonar Quick Reference To turn off HyperScroll Page Read Me First How this manual can get you out on the water, fastGeneral Figuration and installation, bottom composi How Sonar Works How to Use this Manual Typographical Conventions Page Transducer Installation PreparationsSingle-frequency transom installations Pad Deadrise less than Strakes Transom Page Page Dot Transducer bracket RatchetRatchet Ratchets Bolt Transom Bottom Hull Flat-bottom hull Deep-vee hull Internal tooth washer TMB-S bracket Bolt Nut Flat washer Partial fish arches Hulls With Flotation Materials Transducer location High speed Trolling speed True bottom Second bottom Manual range setting Page Epoxy transducer to hull Speed/Temperature Sensors Optional Speed Sensor Installation Good location Power Connections Page Power connections for the sonar unit Front 72.9 173.9 23.4 137.9 157.9 Millimeter 56.9 Inch In-Dash Template Cell battery Page Basic Sonar Operation KeyboardPower/lights on and off Main Menu Pages Pages Menu showing Sonar display options Page Page Depth scale FasTrack, fish arches show as horizontal bars Basic Sonar Quick Reference Sonar Operations Page Page Important Tip Page Page Page Sonar Options & Other Features ASP Advanced Signal ProcessingAlarms To adjust and turn on the Shallow Alarm Enabledentexit Enabledentexit Backlight and Contrast Level Calibrate Speed Chart Speed ColorLine Depth Cursor Thin or no ColorLine Wider ColorLineDepth Range Automatic Cursor line Depth boxDepth Range Manual Fish I.D. Fish Symbols & Depths FasTrackPage FishTrack Frequency Change Transducer Frequency SeaFinder unit only HyperScroll Noise RejectionOverlay Data Data list showing Water Speed selected to display on Sonar Tip Ping Speed & HyperScroll Page Pop-up Help Reset Options Reset Water Distance Set Keel OffsetPress MENUMENU↓ to SET Keel Offsetent Sensitivity & Auto Sensitivity Auto Sensitivityent Sonar Chart Mode Set LanguageSoftware Version Information Sonar Page & Sonar Chart Display Options Page Page Customizing the Digital Data/Chart Screen Sonar Simulator Stop Chart Surface Clarity Transparency Press ↓ to select Surface ClarityENTUnits of Measure Volume Zoom BarZoom Pan Page Troubleshooting Page Page Page Supplemental Material FCC Compliance Page Eagle Electronics How to Obtain Service… Accessory Ordering Information for all countries Visit our web site
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