Here is a list of all documented namespaces with brief descriptions:

[detail level 123]

NImportCrewlounge
▼NOPL	A namespace to collect constants and enums used throughout the application
NAssets
▼NCalc	The ACalc namespace provides various functions for calculations that are performed outside of the database. This includes tasks like converting different units and formats, or functions calculating block time or night time
CNightTimeValues	The NightTimeValues struct encapsulates values relating to night time that are needed by the NewFlightDialog
NDb
NLog	The OPL::Log namespace encapsulates constants and functions used to provide logging to files and logging to console (stdout)
NStatistics
NStyles
NTime
CPaths
CStyleSheet	The StyleSheet struct holds the Display Name and File Name (in the resource system) for the available stylesheets
CStyle	The AStyle class encapsulates style and stylesheet logic
CDatabase	The DB class encapsulates the SQL database by providing fast access to hot database data
CDbCompletionData	Provides data for QCompleters and QHashs
CDbSummary	Collects summaries of entries and relevant data from the database
CRow	Interface for retreiving and submitting entries from the database
CAircraftEntry	A Row representing an Aircraft entry. See Row class for details
CTailEntry	A Row representing a Tail (Registration) entry. See Row class for details
CPilotEntry	A Row representing a Pilot entry. See Row class for details
CSimulatorEntry	A Row representing a Simulator entry. See Row class for details
CFlightEntry	A Row representing a Flight entry. See Row class for details
CCurrencyEntry	A Row representing a Currency entry. See Row class for details
CAirportEntry	A Row representing an Airport entry. See Row class for details
CDateTime
CANotificationHandler	Handles displaying of user-directed messages. It displays information to the user in a QMessageBox and forwards the displayed message to ALog so it is written to the console and log files. The INFO, WARN and CRIT makros provide convenient access
COplGlobals	Encapsulates non-POD globals to avoid making them static. It is available as a global static object via the OPL::GLOBAL makro and may be used as if it were a pointer, guaranteed to be initialized exactly once. For more information, see (Q_GLOBAL_STATIC)[https://doc.qt.io/qt-5/qglobalstatic.html#details]