NorthStar EXPLORER 557 Installation And Operation Manual page 3

Important
The choice, location, angle and installation of the instrument & GPS antenna are critical to performance
of the system as intended. Follow instructions in this manual carefully. If in doubt, consult your Northstar
dealer.
Ensure that any holes cut are in a safe position and will not weaken the boat's structure. If in doubt, consult
a qualifi ed boat builder.
Global Position System: The global Position System (GPS) is operated by the U.S. Government which is
solely responsible for its operation, accuracy and maintenance. The GPS is subject to changes which could
aff ect the accuracy and performance of all GPS equipment anywhere in the world, including the 557/567
and 650, 657, 660. To reduce the risk of misusing or misinterpreting the 557/567 and 650, 657, 660, you
must read and understand all aspects of this Installation & Operation Manual. We also recommend that
practice all operations using the built-in simulator before using the 557/567 or 650, 657, 660.
Electronic Chart: The electronic chart used by 557/567 or 650, 657, 660 is an aid to navigation designed
to supplement, not replace offi cial government charts. Only offi cial government charts supplemented by
notices to mariners contain the information required for safe and prudent navigation, Always supplement
the electronic information provided by 557/567 or 650, 657, 660 with other plotting sources such as
observations, depth soundings, radar and hand compass bearings. Should the information not agree, the
discrepancy must be resolved before proceeding any further.
AIS: The AIS features on this chart-plotter are designed as a safety aid only and do not guarantee safety
at sea. AIS transmission is mandatory on some, but not all, vessels. You should check your local laws and
regulations for requirements in your area. As a result of diff erent legal requirements, diff erent vessel sizes
and uses, you should not assume that your AIS equipped chart-plotter will show the location of ALL vessels
in your area. Careful prudence, judgement, and safe navigation practices should be always be exercised. AIS
should be used to complement radar, but AIS is not a substitute for radar.
Fuel Computer: Do not rely on the fuel computer as the sole source of information regarding available
fuel onboard. Fuel economy can change drastically depending on boat loading and sea conditions. Fuel
Computer information should be supplemented by visual or other checks of the fuel load. This is necessary
due to possible operator errors such as forgetting to reset the fuel used when fi lling the tank, running the
engine with the Fuel Computer not switched on, or on other operator actions that may render the device
inaccurate. Always carry adequate fuel onboard for the intended trip, plus a reserve to allow for unforeseen
circumstances.
Failure to adhere to these warnings may lead to death, serious injury or property damage. Northstar
disclaims all liability for installation or use of this product that causes or contributes to death, injury
or property damage or that violates any law.
The 557/567 is set up with default units. To change the units, see section 15-9
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Northstar Explorer 557/567 Installation and Operation Manual