Dual Frequency Combo - External Antenna.

Compact and powerful, the Northstar Explorer Series Combo Units are user-friendly versatile on-board information systems.
Northstar Explorer 657
Explorer 657 Northstar??s 5" high resolution VGA Chartplotter/Fishfinder combo with Fuel Management and AIS functionality.

The built-in 32 MB regional background map still offers reliable entry-level use, waiting to be enhanced with C‑Map??s latest cartography: NT MAX??. With a 640 x 480 pixel screen, your display becomes 4 times sharper than the Explorer 650, being a truly impressive, bright and highly functional addition to your boat. 

With a range of optional fuel add-ons, the Explorer 657 is a powerful travel tool for your boat.

Display Size : 5 in \ 127 mm

Display Resolution : 640 x 480 (H x W)

Display Type : 256 Color TFT LCD

Graphical Analog Displays : Yes

Graphical Numeric Displays : Yes

Backlighting Color : White

Backlighting Levels : 16

Resize Display Window : Yes

Sonar And GPS Overlay Data : Yes

Sonar Overlay Data : Yes

Split Screen Presentation : Yes

Multilanguage Display : Yes

Languages Supported : 13

Sonar Frequency : 50 kHz and 200 kHz kHz

Transducer Type : Various: See transducer selection table

Sonar Output Power : Max 600W W

Sonar Depth : Max 2000 ft \ 600 m

Sonar Alarms: Fish, Max and Min Depth : Yes

Depth Alarm : Yes

Temperature Display : Yes

Depth Units : Yes

Fish Detection : Yes

Sounder On/Off : Yes

GPS Antenna Type : Northstar Model 124 GPS Antenna

GPS Receiver Channels : 12 channels

Background Map : 32 MB

Man Overboard Feature : Yes

GPS Alarms : Yes

GPS Interface : Yes

GPS Position Accuracy : 33 ft \ 10 m

GPS Update Rate : 1

Waypoint Identity : 48

Automatic Tuning : Yes

Mounting Selectable Port Or Starboard : Yes

Antenna Type : 12 Channel GPS-WAAS EGNOS Enabled

Mounting : Flush mount, Bracket Mount (Bracket Included)

Waterproof Standard : IPX7

Width : 6.5 in \ 164 mm

Height : 5.9 in \ 150 mm

Depth : 3.5 in \ 88.5 mm

Adjustable Gain : Yes

Alarm Output : Yes

Bearing To Waypoint : Yes

Button Type : Laser etched silicone rubber and backlit

Chart System : C-Map Max

Compass Safe Distance : 39.4 in \ 1000 mm

Course Over Ground : Yes

Course Up Presentation : Yes

Cross Track Error : Yes

Cursor Control : Yes

Data Card : Yes

Distance To Waypoint : Yes

Environmental Rating : IPX7

External Alarm : Yes

Lat/Long Display : Yes

Log Units : Yes

Manual Automatic Control : Yes

Memory Card Capable : Yes; Waypoints, Routes, Tracks to C-Map Memory Card

Night Illumination : Yes

Non Volatile Memory : Yes

North Up Presentation : Yes

Operating Temperature : 0?? to 50??C

Port Information : Yes

Sea Temperature  : Yes

Speed Damping : Yes

Speed Display : Yes

Speed Over Ground : Yes

Speed Trend : Yes

Speed Units : Yes

Supplied With : GPS Antenna, Sounder, Bracket, Power Cable, Sun Cover, Manuals

Tide Tables : Yes

Time To Go To Waypoint : Yes

Trip Log : Yes

True And Relative Motion : Yes

Type Of Equipment : Combination Chartplotter/Fishfinder

Included Accessories/Parts:

• Owner's Manual
• Quick Reference Guide
• Mounting Bracket
• Power Cable
• Transom Mount Transducer

Product SKU: NS006641