NorthStar 490 Echosounder Operation Manual page 27

Entering numerical
values
490 Echo Sounder Operations Manual Rev. B2
When changing the numerical value of the echo sounder's
settings, you can either press the CURSOR PAD to increase or
decrease the value, or use the KEYPAD to manually type in
the desired value.
Chapter 2 - Quick Start: Using the Echo Sounder
961/962 echo sounder setup screen
957/958 echo sounder setup screen
Page 2-13