NorthStar Navigation Echo Sounder NorthStar 491 User Manual
Northstar 491 echo sounder, Operations manual
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
Table of contents