NorthStar 951 User manual

ADDENDUM
to
Northstar 951/952 GPS Chart Navigator
Operator’s Manual
(P/N GM1500C, Revision B)
This addendum applies to 952 software version 4.02 and later
Northstar Technologies, Inc.
30 Sudbury Road
Acton, Massachusetts 01720
[phone]
P/N GM1511 Rev. A 10/15/01

TABLE OF CONTENTS
ABOUT THIS ADDENDUM - - - - - - - - - - - - - 1
CONTACTING NORTHSTAR - - - - - - - - - - - - 1
ROTATING CHARTS ON THE CHART SCREEN - - - 2
CHANGING THE ROTATION SETTING - - - - - - - 2
UNDERSTANDING THE ROTATED SCREENS - - - - 3
USING CHART ROTATION WHILE BROWSING - - - 5
OTHER NOTES - - - - - - - - - - - - - - - - - - 6

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10/15/01 Addendum P/N GM1511
ABOUT THIS ADDENDUM
This addendum contains information that adds to the Northstar
951/952 Operator’s Manual (GM1500C, Rev. B). This addendum
describes the new chart-rotation feature, which applies only to
the 952, not the 951.
CONTACTING NORTHSTAR
For service or sales information on this product, contact
Northstar by email, fax, phone, or U.S. mail as follows:
Table 1: Contacting Northstar
Email:
Service: [e-mail]
Sales: [e-mail]
Fax:
Service: 978/897-1595
Sales: 978/897-7241
Telephone:
Main number: 978/897-6600 or 800/628-4487
U.S. mail:
30 Sudbury Road
Acton, MA 01720
Website:
www.northstarcmc.com (you can send email to
Northstar directly from this site)

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Addendum P/N GM1511 10/15/01
ROTATING CHARTS ON THE CHART SCREEN
The 952’s chart-rotation feature lets you change the angle of
charts that are displayed on the CHART screen. You can turn
charts to any one of the following angles:
☛North up -You’ll see north pointing straight upwards (the
chart isn’t turned).
☛Course-up -You’ll see your vessel’s current direction of
travel—whatever that direction is—pointing straight upwards.
Course-up represents your true course over the last few
seconds as determined by the GPS receiver. The 952 ignores
any course changes if your speed is under half a knot. The
chart will rotate sooner for large turns than for small ones.
☛Leg-up -You’ll see your vessel’s current leg to a waypoint—
whatever direction that is—pointing straight upwards. The
952 will adjust the chart on a leg-by-leg basis, so the chart
turns accordingly whenever you start navigating on a new
leg, even if you haven’t turned the vessel yet. Exception: If
you select leg-up when you aren’t currently navigating, the
952 automatically uses course-up—until you start navigating
along another leg.
If you’re viewing course-up or leg-up, the text from the
Navionics cartridge is tilted to match the rotation angle in order
to avoid text overlap.
CHANGING THE ROTATION SETTING
To change the chart rotation setting:
❶ Press the key to display the CHART screen.
❷ Press the CHART SETUP key to display the CHART SETUP/
STATUS screen.
❸ Press the ROTATION IS key to select among the three
choices:
• rotation is north up
• rotation is course up

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10/15/01 Addendum P/N GM1511
• rotation is leg up
❹ When you see the desired choice, press the RETURN key to
display your choice on the CHART screen.
UNDERSTANDING THE ROTATED SCREENS
The following three screens show how the chart looks if you’re
travelling along a sample route that has four waypoints, and you
rotate the chart from north-up to course-up and then to leg-up.
Figure 1: North-up chart angle (first leg going northwest)
Figure 1 shows the vessel heading northwest on the first leg from
the first waypoint to the second one. The chart’s viewing angle is
set to north-up. Notice the direction of the north-pointing arrow
in the upper right corner.

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Addendum P/N GM1511 10/15/01
Figure 2: Course-up chart angle (second leg going east)
Figure 2 shows the same chart, but with the chart’s viewing
angle now set to course-up and the vessel on a slightly different
course than the second route leg. Notice the new direction of the
north-pointing arrow.

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10/15/01 Addendum P/N GM1511
Figure 3: Leg-up chart angle (third leg going south)
Figure 3 shows the same chart, but with the chart’s viewing
angle now set to leg-up and the vessel on a different course than
the third leg. Notice the new direction of the north-pointing
arrow.
USING CHART ROTATION WHILE BROWSING
• Course-up - If you’re displaying the charts as course-up and
you go into browse mode (by pressing the CURSOR PAD), if
your vessel changes course, you won’t see the chart turn to
the new direction until you fully return to vessel mode (by
pressing the VESSEL key). You must be in vessel mode to
see any changed course angle. This feature lets you keep a
steady viewing angle if you’re browsing around on the chart.
•Leg-up - If you’re displaying charts as leg-up and the 952
switches to a new leg, you’ll see the chart rotate to the
direction of that new leg even in browse mode—unless
you’re actively pressing the CURSOR PAD.

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Addendum P/N GM1511 10/15/01
OTHER NOTES
• If you’re displaying the charts as either leg-up or course-up,
you may see a black line with white space on the other side.
This line represents the edge of the chart, which is visible
since the chart has been rotated. When the vessel or cursor
crosses the line, the display will switch to a new chart.
• In software version 4.02 and later, the edges of other charts
in the 952’s built-in world atlas are shown, in addition to
those in your local cartridge. These edges are shown as
black or red dashed lines.
• The lat/lon grid will be labelled only when the chart is
north-up.