The requested vessel with name SYNAPSE and MMSI:338141245 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
SYNAPSE N/A 367577320 Feb 05, 2017 17:20 UTC

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