Name	Data Type	Definition
name	TextNameType	The textual name of the station.
type	CodeSpecialNavigationStationType	A code indicating the type of service within the chain. E.g. Master, Red Slave (DECCA), Slave (LORAN) etc..
frequency	ValFrequencyType	The value of the emission frequency.
emission	CodeRadioEmissionType	A code indicating the type of emission, as defined at the 1979 ITU World Administrative Radio Conference.

Association	Multiplicity	Role	To	Role description
isLocatedAt	0..1	position	ElevatedPoint	The graphical point of the special navigation station.
hasAnnotations	0..*	annotation	Note
isOperationalBy	0..*	availability	SpecialNavigationStationStatus	The operational status of the Special Navigation Station.
isMaintainedBy	0..1	responsibleOrganisation	OrganisationAuthority	The organization responsible for the equipment.
belongsTo	0..1	systemChain	SpecialNavigationSystem	A special navigation system chain

From	Association	Multiplicity	Role	To	Role description
EquipmentChoice		0..1	specialNavigationStation	A land based station of a special navigation system.
VerticalStructure	hosts	0..*	hostedSpecialNavStation	The Special Navigation Station hosted by the vertical structure.

1 - Radio Frequency Limitation , 2 - Vertical Structure Associations , 3 - Navaid Limitation , 4 - Special Navigation System