Performs application-defined tasks associated with freeing, releasing, or resetting unmanaged resources.

Returns details of the aircraft with the unique ID passed across or null if no such aircraft exists. The aircraft returned is a clone of the orignal, it will not change as further messages are received from the aircraft.

Starts the tracking of aircraft.

Stops tracking aircraft.

Returns a list of all of the aircraft currently being tracked. The aircraft objects are clones of the originals held by the list, they will not change as further messages are received from the aircraft.