57
Reference section 4 — Navigating to Waypoints
The course predictor line
Reference Manual Revision B
Steering on the chart
You can also steer by watching your
progress directly on the chart screen,
rather than using the steer screens
described above. Several aids in the 972
help you do this:
•
dotted green line
on the chart shows
the original track line from your
initial
vessel position to the waypoint
•
dotted red line
on the chart shows the
direct line from your
current
vessel
position to the waypoint
•
a pair of blue dotted lines
surrounding
the original track line to the waypoint
show the width of the allowable cross
track error. These lines will be present
only if the Cross Track alarm is turned
on)
Note that the blue circle surrounding each
waypoint represents the allowable cross
track error,
not
the arrival radius.
The course predictor line
The course predictor line (see
Using the
course predictor line,
on page 38) provides
another effective way to navigate a course
line or even to navigate directly to a point
on the chart. On the chart or radar screen,
just keep the end of the predictor line near
the intended course line, and your vessel
will steer towards and gently merge with
the line.
The predictor line is also shown on the 3D
steer screen where it may appear curved to
represent the actual track on the 3D grid.
Summary of Contents for 972
Page 1: ...Northstar 972 Quickstart Guide and Reference Manual Revision B ...
Page 12: ...8 Getting Started Purchasing charts Northstar 972 ...
Page 19: ...15 Displaying the chart screen Quickstart Guide Revision B Chart screen ...
Page 30: ...26 SAVE and Man Overboard MOB Northstar 972 ...
Page 54: ...50 Reference section 3 Position coordinates Using Phantom Loran Northstar 972 ...
Page 90: ...86 Reference section 6 Radar Transferring waypoints to and from a PC Northstar 972 ...
Page 106: ...102 Reference section 7 Echo sounding MARPA targets Northstar 972 ...
Page 130: ...126 Reference section 7 Echo sounding Troubleshooting the echo sounder Northstar 972 ...
Page 134: ...130 Reference section 8 Video Displaying video Northstar 972 ...
Page 148: ...144 Reference section 10 Networking Restrictions Northstar 972 ...
Page 158: ...154 Reference section 11 Setup Changing the time zone Northstar 972 ...
Page 164: ...160 Reference section 11 Appendix A Datum list Changing the time zone Northstar 972 ...
Page 168: ...164 Northstar 972 Notes ...
Page 169: ...Notes 165 Operator s Manual Revision B ...
Page 170: ...166 Northstar 972 Notes ...
Page 171: ...Notes 167 Operator s Manual Revision B ...
Page 172: ...168 Northstar 972 Notes ...
Page 173: ...Notes 169 Operator s Manual Revision B ...
Page 174: ...170 Northstar 972 Notes ...
Page 175: ...Notes 171 Operator s Manual Revision B ...
Page 176: ...172 Northstar 972 Notes ...
Page 177: ...Notes 173 Operator s Manual Revision B ...
Page 178: ...174 Northstar 972 Notes ...
Page 179: ...Notes 175 Operator s Manual Revision B ...
Page 180: ...176 Northstar 972 Notes ...
Page 181: ...Notes 177 Operator s Manual Revision B ...
Page 182: ...178 Northstar 972 Notes ...
Page 183: ...Notes 179 Operator s Manual Revision B ...
Page 184: ...180 Northstar 972 Notes ...