# Relations

## AircraftManufacturer

- HasMany AircraftType

## AircraftType

- BelongsTo AircraftManufacturer
- BelongsTo Typerating (External DB, creation in Schooling Plugin)
- HasMany Aircraft

## Aircraft

- BelongsTo AircraftType
- BelongsToMany AircraftTypeGroup
- BelongsTo Airport (2x, External DB, creation in Routes Plugin)

## AircraftTypeGroup

- BelongsToMany AircraftType