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Raymarine does not warrant the accuracy of such information and you are advised that
errors in such information may cause the product to malfunction or give incorrect
readings. Raymarine is not responsible for damages or injuries caused by your use or
inability to use the product, by the interaction of the product with products
manufactured by others, or by errors in chart data or information utilized by the
product provided by third parties.
Except for the limited warranty regarding the magnetic media contained in the license
agreement accompanying the product, this product is provided 'AS IS' without
warranty of any kind, either express or implied, including but not limited to the implied
warranties of merchantability and fitness for a particular purpose, and any others
which may arise from course of performance, course of dealing, or usage of trade.
The limits of electronic navigation
Experienced navigators know not to rely on a single method of navigation for
determining their position. Two or more methods should be used to determine position
and guard against errors placing you or your boat in a dangerous position. Global
Positioning System (GPS) based electronic navigation is an amazing application of
technology, but like all other technology, has limits. A wise navigator will understand
these limits and how they affect the safety of their boat and crew.
The Global Positioning System is made up of components starting with ground based
computers to monitor and maintain the system made up of 24 satellites in orbit around
the earth. The system ends at your boat's receiver. Like all systems it is not perfect and
any part of it can fail. GPS accuracy varies between 2 and 50 meters.
NMEA 0183 1.0 / 1.5 only supports 2 digits of latitude and longitude, giving a precision
of approximately 60 feet.
NMEA 2.0 / 2.1 supports 3 digits of latitude and longitude, giving a precision of
approximately 6 feet.
Another limitation to the system accuracy is digital charts. These electronic charts are
made by highly skilled cartographers. Surveys on which the cartography is based, were
in some cases, made over 50 years ago. So despite everyone's best efforts, it may be
possible to have errors in the final product.
Lastly, RayTech software was developed by highly skilled and talented software
engineers and underwent a rigorous test and quality assurance program before being
released. However, it is possible that software issues or malfunctions may remain
undetected in the software. While Raymarine make every effort to find, fix and repair
software issues as they are discovered, this product is specifically not promised to be
issue free.
RayTech RNS V5.0 - User's Manual
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