NorthStar 490 Echosounder Operation Manual page 72

Appendix A – Specifications
Page A-2
Table 4: 490 echo sounder features (Continued)
Screen notations
Echo data
Seabed depth (various size digits)
Frequency of each window
Speed through water (if connected)
Water temperature (if connected)
Depth scale for each window
Depth of depth marker
Latitude/longitude of position marker and vessel
Alarm status and auto/manual status
Zoom mode
Name of waypoint, and distance and bearing to
waypoint
Steering indicator
Interfacing
Connects Northstar 961/962 GPS Chart Navigator
Northstar 957/958 GPS Chart Navigator
Northstar-recommended or compatible transducer
Other Transducer outputs protected against open circuit/
short circuit
LED monitors input power and system status
Physical characteristics
Dimensions 10 x 6.25 x 2.5 inches
Weight 2 pounds
Environmental characteristics
Temperature -25ºC to +60ºC operating temperature
-55ºC to +90ºC storage temperature
Protection 10 to 30 VDC, 8 Watts, reverse polarity and over-
voltage protection
Standards Waterproof design meets the following: IEC60529
IP6; IEC60945 emissions; CE mark
490 Echo Sounder Operations Manual Rev. B2