Northstar 491 Sounder/Fishfinder

Northstar 491 Sounder/Fishfinder

DISPLAY

Display Type
6100i or 6000i Compatible (Also 972, 962, 961, 958, 957)
Split Screen Presentation
Yes

SONAR / SOUNDER

Sonar Frequency
50 kHz or 200 kHz
Transducer Type
Various: See transducer selection table
Sonar Output Power
Max 600W or 1000 W
Sonar Depth
Max 3500 ft \ 1077 m
Sonar Alarms: Fish, Max and Min Depth
Yes
Depth Alarm
Yes
Shallow Alarm
Yes
Temperature Display
Yes
Depth Units
Yes
Sonar Max Transmission Rate
600
Sounder On/Off
Yes

AUTOPILOT / AUTOSTEERING

Multiple Stations
Yes

POWER

Power Supply
10-36 VDC, 8 watts. Reverse polarity and overvoltage protected vDC

OTHER

Adjustable Gain
Yes
Alarm Output
Yes
Dedicated Mode Keys
Yes
Environmental Rating
Waterproof, Sealed Design
Gain
0-75 dB
Lat/Long Display
Yes
Manual Automatic Control
Yes
Other Features

  • ”SoundTrac” go directly to past echo

  • Navigation data shown at bottom of screen

Sea Temperature
Yes
Speed Units
Yes
Type Of Equipment
Blackbox Sounder