5. VECTOR (S57) CHARTS
5-5
3. Click the date button to show the [Set date] dia-
log box.
4. Select the appropriate date from the calendar,
then click [OK] to close the [Set date] dialog box
and return to the [Viewing Dates] dialog box.
5. Click [Close].
6. Check the appropriate charts, then access the
Viewing Dates dialog again (see step 1).
7. Select [AUTO - Today] to show the current
date’s chart.
8. Click [Close].
5.2.3 About chart viewing date dependency of S57 standard
How the issue date of updates changes the visibility of the changes
Study the example below to understand the behavior of updates relative to date.
The figure above shows how updates are dependent Chart viewing dates set in Dis-
play/Approved date settings by user. Actions 1 to 4 areas as follows:
1. Base cell including three updates is converted into SENC. Display Date is set as
current date of the system.
2. The date in which update 1 was issued. [Display Date] must be set to correct date
in order to see the chart with update 1.
3. The date in which update 2 was issued. [Display Date] must be set to correct date
in order to see the chart with update 1 and update 2.
4. The date in which update 3 was issued. [Display Date] must be set to correct date
in order to see the chart with update 1, update 2 and update 3.
Note 1: In order to display charts with correct updated situation, always use current
date during your voyage. If your voyage lasts more than one week, set current date at
least once per week during your voyage.
Note 2: In order to display charts with correct updated situation during route planning,
always use the planned date of each waypoint to check your plan.
1 2 3 4
Update 3
Update 2
Update 1
Base cell
Date
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