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 TJ PEMACINGAN Jan 26, 2018 15:21 UTC

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