The requested vessel with name LE CITADELLE and MMSI:316020921 and IMO:0 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
LE CITADELLE N/A 338188003 Aug 19, 2016 23:42 UTC

Also, you may try to find the vessel in our comprehensive Vessels Database or track this ship on the map.