Chapter 4 - Understanding the Chart Screen
Page 4-2
961 Operations and Reference Manual Rev. D
Understanding electronic charts
The electronic charts used by the 961 have been scanned
directly from the official paper charts. When used carefully,
electronic charts can open up a whole new world of accuracy
and simplicity. However, don’t let yourself become overly con-
fident: Always be cautious! The captain is responsible for
cross-checking the 961 against other sources of navigation
data.
Moving between
charts
As your vessel moves from one area to another, the 961 auto-
matically changes from one chart to another, taking your cur-
rent zoom level into account. Remember that the level of
detail may vary from chart to chart. If you move from a highly
detailed chart to a less detailed one, you’ll probably see a sud-
den change in the detail shown on the screen, just as if you’d
changed from one paper chart to another.
Chart scale
At the lower left-hand side of the
CHART
screen is the 961’s
chart scale box, which shows the chart magnification. A dis-
play of
1/1
indicates the largest magnification at which you
can display the current chart. As you zoom out, this number
changes to
1/2
,
1/4
,
1/8
, and so on.
Understanding the chart screen
Chart orientation
The 961 displays charts with the orientation that you specify.
Many charts (including all ChartPack charts) are printed
north-up. For those charts, north is up, south is down, east is
right, and west is left—regardless of the actual direction your
vessel is headed. Only ChartPack charts are
always
printed
north-up, however. For any other given chart, north could be
up, down, left, right, or any angle in between. Accordingly, the
961 displays a north-pointing directional arrow in the upper
right corner of the screen, indicating each chart’s orientation.
The 961’s plotter grid, available when there isn’t a chart for
your particular area, is always oriented in the north-up direc-
tion.
N
Summary of Contents for 961X
Page 1: ...961 961 GPS Chart Navigator Operations and Reference Manual P N GM1700 Revision D X XD ...
Page 8: ...Page viii 961 Operations and Reference Manual Rev D ...
Page 10: ...Page x 961 Operations and Reference Manual Rev D ...
Page 58: ...Chapter 2 Introducing the 961 Page 2 16 961 Operations and Reference Manual Rev D ...
Page 172: ...Chapter 7 Creating Avoidance Points Page 7 16 961 Operations and Reference Manual Rev D ...
Page 198: ...Chapter 8 Creating Routes Page 8 26 961 Operations and Reference Manual Rev D ...
Page 262: ...Chapter 12 Alarms TideTrack and Currents Page 12 16 961 Operations and Reference Manual Rev D ...
Page 374: ...Index Page I 12 961 Operations and Reference Manual Rev D ...