Raytheon Pathfinder ECDIS, Operator'S Manual

Page: 94 / 370

Operator Manual
4 − 22
3655DOC020102 Edition: 30.MAR.2007
Second Alignment Point
Using the puck at the digitizing table, place the cross hairs over the lower most
and left most major latitude and longitude crossing point. The longitude of this
second alignment point must be the same longitude as the first alignment point.
Left click the puck. Only the latitude field of the second point will be available for
editing. The longitude field of the second point will be automatically entered.
Enter the latitude of the crossing point that was selected with the puck. Select
Accept if the parameters are acceptable.
A value representing the percentage of accuracy will be automatically calculated
and entered in the right
− hand column, this value is indicative of paper chart
stretch or shrinkage, data entry correctness and physical chart alignment on the
table.
Third Alignment Point
Using the puck at the digitizing table, place the cross hairs over the lower most
and right most majors latitude and longitude crossing point. The latitude of this
third alignment point must be the same latitude as the second crossing point.
Left click the puck. Only the longitude of the third point will be available for
editing. The latitude field of the third point will be automatically entered. Enter the
longitude of crossing point that was selected with the puck. Select Accept if the
parameters are acceptable. Again, a value representing the percentage of
accuracy will be automatically calculated and entered in the right
− hand column.
Fourth Alignment Point
Using the puck at the digitizing table, place the cross hairs over any know point
on the chart. Left click the puck. The latitude and the longitude field for the fourth
alignment point will be available for editing. Enter the latitude and longitude of
the point that was selected with the puck. Select Accept if the parameters are
acceptable. The percentage accuracy for the final point will be calculated and an
average of all the accuracy is determined, if the average percentage accuracy
does not fall within pre
− specified limits, the chart alignment must be repeated.
Refer to the next paragraph for further details.