NorthStar Navigation - NorthStar 491

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Contents

Northstar 491 Echo Sounder Operations Manual This manual is for using the 491 sounder with the Northstar 957 958 961 and 962 navigators For the Northstar 6000i information in Section 6 of its manual can be used instead Revision A Part Number GM494 Northstar a unit of Brunswick New Technologies Marine Electronics 30 Sudbury Road Acton Massachusetts 01720 www NorthstarNav com Service 978 897 6600 Sales 800 628 4487 Contents 1 Welcome 1 Welcome to the Northstar 491 2 Using this manual 2 Technical support 4 How echo sounding works 5 Powering the 491 on and off 7 Setting up the 491 7 2 Quick Start Using the Echo Sounder 11 Displaying the echo sounder s picture 12 Using demo mode 14 Introducing the displayed information ...