How do I know which of my employee's documents are about to expire?

Warnings not only give you an overview of the documents that are about to expire but also provide additional information, such as birthdays and a list of people for whom the known qualifications do not correspond to the rank entered.

Tabs:

Employee expiry: This provides an overview of the employee's expired documents.
Birthdays: This view provides an overview of the employees born on this day. In the Crewing module, you can specify a certain period to create a list of all birthdays, such as the past seven days, today, and the next seven days.
Onboard expiries: This shows the expired documents of employees who are currently planned to be on board.
Ranks: This shows the employees whose rank as listed in the General tab does not correspond to their known qualifications and educations.
Planning: This shows the planning warnings, such as failure to meet the safe manning requirements.