N4 divides the day into four time periods, P1 - P4, which you can use to filter terminal data. When filtering, the time period options are available when you select a Date and Time filter criteria, such as the Act. Time of Arrival for a vessel visit, as you can see in the example below:
You can configure these time periods using eight N4 settings from FRMCARINA002 through FRMCARINA009. Each time period is determined by two settings, one that determines the start time, and one that determines the end. The following table shows you the default values for these settings.
Configuration Setting Description Minimum Maximum Default
FRMCARINA002 (P1_START)
Start of the 1st period of the day.
0000
2400
0000
FRMCARINA003 (P1_END)
End of the 1st period of the day.
0000
2400
600
FRMCARINA004 (P2_START)
Start of the 2nd period of the day.
0000
2400
600
FRMCARINA005 (P2_END)
End of the 2nd period of the day.
0000
2400
1200
FRMCARINA006 (P3_START)
Start of the 3rd period of the day.
0000
2400
1200
FRMCARINA007 (P3_END)
End of the 3rd period of the day.
0000
2400
1800
FRMCARINA008 (P4_START)
Start of the 4th period of the day.
0000
2400
1800
FRMCARINA009 (P4_END)
End of the 4th period of the day.
0000
2400
2400
You can vary the duration of each period as per your requirements, as shown in the graphic below:
For example, if you set the FRMCARINA002 (P1_START) through FRMCARINA009 (P4_END) settings as shown in the above graphic, you can then create a filter with the following criteria to return all the vessel visits where the ATA is between midnight and 8 o'clock in the morning:
