Garmin 010-11214-00 - MapSource City Navigator NT User Manual - Page 19
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To view tides and marine services information on your Garmin unit:
1. Select and download the desired tide and marine services maps the same way
you would with MapSource BlueChart maps.
2. To display the same marine properties information found in MapSource on your
Garmin unit, place the map cursor on the desired symbol, and press ENTER.
Understanding the Differences Between Electronic
and Paper Charts
Occasionally, boaters notice that the BlueChart data does not duplicate a particular
feature shown on the paper chart they are using. Garmin uses the best charts available
and carefully turns the paper charts into a digital format for display on an electronic
screen. If there are errors, omissions, or discrepancies on paper, they might occur
electronically too.
On paper charts, sometimes even large features like a breakwater might not be shown
clearly or at all. Large breakwaters are sometimes not shown on the harbor charts, but
are shown on coastal charts—or vice versa! These decisions are made by the chart
maker, such as NOAA/NOS. In some cases, bridges, or other features washed away in
storms decades ago, are still shown on the paper charts. Recent changes in coastlines
are often not reflected on paper charts for years.
The same is true for new marinas and ports. Sometimes, well-known local landmarks
might be shown so small on the paper chart that they are indistinguishable from
Blue Chart User's Guide