Introducing snapshots | NorthStar Navigation NorthStar 491 manual

Temperature graph

This key won’t appear unless a temperature sensor is installed and configured.

Speed through the water

This key won’t appear unless a speed sensor is installed and configured.

Press TEMP GRAPH to turn the temperature graph on or off.

The temperature graph displays an orange temperature scale at the left of the screen, and an orange line tracing out the varying water temperature measurements, superimposed on the echoes.

Press SPEED to turn the Speed Through the Water display on or off. STW is displayed on the bottom right corner of the screen.

Introducing snapshots

Taking and storing a snapshot

A snapshot is a picture of the 961/962’s echo sounder screen. You can store up to 10 different snapshots of echo sounder screens for later review. These can be stored on floppy disk (one snapshot per floppy) or zip disk for permanent archiving.

The snapshot feature is not available in the 957/958 or 6000i.

To take a snapshot, press MORE and then SNAPSHOT. The echo sounder screen will be recorded at that instant.

To store the snapshot, you must save the snapshot in one of the ten available storage slots. Choose a slot by pressing the CURSOR PAD up or down to highlight the desired slot, then press SAVE to store the snapshot.

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491 Echo Sounder Operations Manual

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NorthStar Navigation NorthStar 491 manual Introducing snapshots, Temperature graph, Speed through the water

Contents

Northstar Echo Sounder Contents Reviewing past echoes using SoundTrac Troubleshooting 491 OperationsPage 1Welcome Organization Using this manualWelcome to the Northstar Conventions Hearing from you Service and repairTechnical support How echo sounding works 961/962 echo sounder system components Using 491 with the 961/962 Powering the 491 on and offSetting up Using the 491 with the 957/958 Press the Port Setup Options key 961/962 echo sounder menu structure 957/958 echo sounder menu structure 2Quick Start Using the Echo Sounder Displaying the echo sounder’s picture Illustrated Echo screen Illustrated Soundtrac screen Chart Overlay screen Using demo modeAt the Chart Overlay Selection window, press Echo sounding Depth and temperatureIntroducing the displayed information Navigation Status tabs Using automatic mode Cruising or ﬁshing 50 kHz 200 kHz Manually overriding automatic modeChanging the frequency of echoes Echo screen with both frequencies displayed Choosing the zoom scale Choosing a zoom modeZooming in and out Using bottom zoom Using bottom lock zoom Using bottom lock/ center zoom Setup functions Accessing the setup screen Entering numerical values Changing the depth units Changing the temperature graph’s units and scaleTransducer depth Number of special waypoints Speed and temperature sensor setup 961/962 sensor setup screen 957958/ sensor setup screen 3Adjusting the Echo Sounder Picture Adjusting the gain strong echoes Picture menu Adjusting the clutter weak echoes Gain window Adjusting the signal level weak echoes Clutter window Suppressing interference the noise limiter Selecting the color bar hue and white level Understanding the color bar Setting the white level Hue and white level window Echo Sounder Operations Manual 4Understanding Depth Settings Viewing the depth marker Changing the depth settingsViewing the seabed depth Setting the picture’s shift starting depth Shift window Setting the picture’s range Range window Echo Sounder Operations Manual 5Other Functions Using the More key Using the More key Changing the advance speed Displaying the A-scope Scope on single-frequency echo screen Scope on dual-frequency echo screen Setting the Echo screen dataUsing the A-scope with dual frequencies Bottom depth box Temperature box Echo screen data selections Speed through the water Temperature graphIntroducing snapshots Taking and storing a snapshot Archiving and restoring a snapshot with a ﬂoppy disk Snapshot screen 961/962 only Archiving and restoring snapshots with a Zip disk Archiving snapshots screen 961/962 only Setting up the video image overlay Echo Sounder Operations Manual 6Reviewing past echoes using SoundTrac Viewing past echoes using SoundTrac SoundTrac screen Marking ﬁsh as waypoints Navigating to a past echo position Going directly to a past echo position Selected Cursor Position window appears 7Setting the Alarms Understanding the alarms Setting the ﬁsh alarm Setting the upper and lower marker depths Fish alarm window Alarm Setting the bottom alarmSetting inside or outside ﬁsh markers Turning the ﬁsh alarm on and off Setting the bottom level Bottom alarm window Temperature alarm window Setting the temperature alarmTurning the bottom alarm on and off Turning the temperature alarm on and off Upper limit window is highlighted in black When the temperature alarm sounds, an alert message is 8Troubleshooting 491 Operations Troubleshooting the echo sounder Checking the transducer Troubleshooting the echo sounder No echoes displayed when Star key is pressed Checking the transducer OFF Manufacturer Model Power Northstar P/N Maintaining a transducer A491 Features and Speciﬁcations Performance characteristics Screen notations Physical characteristicsEnvironmental characteristics Interfacing Manual controls ON/OFF Echo Sounder Operations Manual Glossary Echo Sounder Operations Manual