
1-12 System Overview
DATABASE CURRENCY STATES
The following table describes the various database currency
states that may be observed at startup:
Valid Thru <Month,
Day, Year >
Expired <Month,
Day, Year>
Effective <Month,
Day, Year>
Charts Issue Date
Between 14 and 21
Days Old (i.e. up to
a week out of date)
Update Available
<Next Cycle Date>
Charts Issue Date
Older Than 21 Days
(i.e. more than a
week out of date)
Update Required
<Date of
Expiration>
NOTE
Use of Not Yet Effective Data
If attempting to use not-yet-effective data (e.g.
charts or nav), it is the responsibility of the pilot in
command to verify there are no differences between
the current data and the not-yet-effective data
before it is permissible to use the not-yet-effective
data.
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