Northstar's 491 Sounder/Fishfinder
Northstar?s New 491 Fishfinder. All the information you need, all the time.

The elite team of engineers at Northstar has called upon their vast experience, knowledge and expertise in sonar technology to bring you the 491 sonar module. This power packed module sets a clear standard in network sonar performance. A unit proven in design and by exhaustive on the water testing by Northstar engineers that know fishing.

This unit offers you the same easy to use functionality and screen clarity for under-the-water information that you would expect from Northstar?s unmatched chartplotter, GPS and radar.

Northstar?s legendary SoundTrac? gives you the ability to scroll back to a target in the screen?s history, mark it, and easily navigate to it. The Northstar 491 is feature rich: 50/200kHz. 600/1000W. Bottom Lock. A Scope. White Line. Alarms for depth, fish, and temperature. Northstar matched transducers. Each feature can be tuned to fit your needs. Or, simply leave the 491 in auto mode and start fishing.

Display Type : 6100i or 6000i Compatible

Split Screen Presentation : Yes

Sonar Frequency : 50 kHz or 200 kHz

Transducer Type : Various: See Northstar transducer section

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

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

Product SKU: NS000491