The Northstar Explorer Chartplotters :
Navigation is easy with Northstars Explorer Series
dedicated chartplotters

A simple-to-use menu structure and superb daylight viewable screen means you can enjoy your voyage whether its across the bay or across an ocean. Rugged and waterproof, the Northstar Explorer is a brilliant choice for your navigation needs.

Ready-to-Go AIS capability: Automatic Identification System (AIS) is ready-to-go on the 567 and 557, allowing you to identify and avoid large ships and other vessels transmitting AIS signals in near by waters.
Compact Yet Comprehensive

Fuel Management: Every Explorer Chartplotter unit has a built-in fuel computer. Just purchase the optional fuel kit to display fuel management data such as fuel flow, fuel remaining, estimated range and fuel economy. A graphical fuel gauge complements this digital information, and each Explorer comes SmartCraft^™-ready - a fantastic feature for boats with compatible Mercury, MerCruiser and Mariner engines.

Explorer 557: The built-in 32 MB regional background map still offers reliable entry-level use, waiting to be enhanced with C-Maps latest cartography: NT MAX^™. With a 640 x 480 pixel screen, chart display becomes 4 times sharper than the 550, making the 557 very easy on the eye.