Allways in UTC timeframe (YYYY-MM-DDThh:mm:ss) Vessel Identification according to the IMO AIS standards Allways in UTC timeframe (YYYY-MM-DDThh:mm:ss) In meters In meters In meters In decimal deegrees of angle In decimal deegrees of angle In decimal deegrees of angle In knots Units as defined for IMO AIS ? Free text Organizational source of data for the object of which this element is a member, used at several levels and may represent a data service provider, a data management sys., an AIS transmission sys., etc. Inherits the pointMemberType of gml. This 'time slice' type encapsulates the various dynamic properties of AIS objects at a given point in time and space Time represents here the AIS message time stamp (mandatory) SOG as defined for AIS messages (optional) COG as defined for AIS messages (optional) Heading as defined for AIS messages (optional) Bearing, not currently defined for AIS messages (optional) Rate Of Turn as defined for AIS messages (optional) Status free text as defined for AIS messages (optional) optional dataSource (optional) represents here the infrastructure supplying the AIS message The track of an object is a sequence of specialized timeslices (i.e. ObjectStatus) that indicate the dynamic status of the object. Inherits srsName attribute of abstract geometry type for defining SRS for this entire track, i.e. all geometry elements within this track are interpreted under the given SRS, unless differently specified at a lower level for each geometric element. This is applied as the geometry property of a feature, so that general GML tools can interpret that each feature is associated with a given geometry - NB! it contains no attribute group refering to gml:AssociationAttributeGroup mandatory mandatory mandatory optional optional optional optional optional optional optional optional optional optional optional Time (optional) represents here the time of creation of this feature as a "snapshot" of history, which implies the latest possible time of an AISObjectStatus within the feature. Should be identical to - and omitted here - given the enclosing feature collection's time dataSource (optional) represents here the generating organizational source for this feature, e.g. coastal traffic authorities collecting AIS messages from a fleet. Should be identical to - and omitted here - given the enclosing feature collection's dataSource