28
Reference section 1 — Using the Chart Screen
Using electronic charts
Northstar 972
Using electronic charts
Electronic charts contain most of the infor-
mation from the original paper charts. You
can select which categories of data are
displayed to simplify the screen. When
used with caution, electronic charts open
up a world of navigational accuracy and
simplicity.
Chart boundaries
The
972 displays the boundary line of each
chart on the
Chart
screen. You can turn
these lines off if you prefer (see
Choosing
vector chart details,
starting on page 35).
If you move from a highly detailed chart to
a less detailed one, you may see a sudden
change in the detail shown on the screen,
just as if you had changed from one
detailed paper chart to a less detailed one.
The displayed boundary lines may help
indicate when this change in detail is going
to happen.
Lights and buoys
The nav aids on the
Chart
screen represent
a variety of standard “aids to navigation”
used on coastal and inland waterways
throughout the United States. Most of
these aids are buoys, lights, lighthouses,
and daybeacons, which typically are main-
tained by the U.S. Coast Guard. Nav aids
warn you of hidden dangers, such as
underwater hazards, and to help you safely
navigate specific waterways and channels.
On a vector chart, when you move the
cursor over a nav aid, with popups are
turned on, the 972 displays a description in
the popup rectangle near the nav aid,
along with the distance and bearing from
your vessel to the nav aid.
Zooming in and out
To get a closer look at the chart area
around your vessel or around the cursor,
press the
IN
key to zoom in. To see a wider
area, press
OUT
to zoom out. Each press of
IN
or
OUT
approximately halves or doubles
the chart scale.
NOTE:
Whenever the radar overlay is turned on
and “Auto Range” is turned on, the scales of
the chart and the radar are locked together
so that the images will line up. If you change
the scale of one, the scale of the other
changes automatically.
CAUTION!
Nav aids have been
converted from official
paper charts into the
electronic format on
your screen, and there-
fore aren’t necessarily
as accurate as the
paper charts. In some
areas, only the most
important nav aids may
be shown.
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Страница 1: ...Northstar 972 Quickstart Guide and Reference Manual Revision B ...
Страница 12: ...8 Getting Started Purchasing charts Northstar 972 ...
Страница 19: ...15 Displaying the chart screen Quickstart Guide Revision B Chart screen ...
Страница 30: ...26 SAVE and Man Overboard MOB Northstar 972 ...
Страница 44: ...40 Reference section 1 Using the Chart Screen Using the distance and bearing calculator Northstar 972 ...
Страница 54: ...50 Reference section 3 Position coordinates Using Phantom Loran Northstar 972 ...
Страница 88: ...84 Reference section 5 Creating waypoints and routes Transferring waypoints to and from a PC Northstar 972 ...
Страница 90: ...86 Reference section 6 Radar Transferring waypoints to and from a PC Northstar 972 ...
Страница 106: ...102 Reference section 7 Echo sounding MARPA targets Northstar 972 ...
Страница 130: ...126 Reference section 7 Echo sounding Troubleshooting the echo sounder Northstar 972 ...
Страница 131: ...127 Reference Manual Revision B Reference section 8 Video Video sources 128 Displaying video 128 ...
Страница 134: ...130 Reference section 8 Video Displaying video Northstar 972 ...
Страница 135: ...131 Reference Manual Revision B Reference section 9 Alarms and TideTrack Alarms 132 TideTrack 137 ...
Страница 145: ...141 Reference Manual Revision B Reference section 10 Networking General information 142 Restrictions 142 ...
Страница 148: ...144 Reference section 10 Networking Restrictions Northstar 972 ...
Страница 158: ...154 Reference section 11 Setup Changing the time zone Northstar 972 ...
Страница 164: ...160 Reference section 11 Appendix A Datum list Changing the time zone Northstar 972 ...
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