The requested vessel with name SERENE SKY and MMSI:0 and IMO:7373987 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
SERENE SKY 9514353 351224000 CHITTAGONG Nov 15, 2017 11:58 UTC

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