The requested vessel with name LETA and MMSI:0 and IMO:5204481 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
LETANI N/A 319115200 Oct 17, 2017 20:35 UTC
LETARE N/A 701000540 ZONA DE PESCA May 22, 2017 14:35 UTC
LETAVIA 9246683 636090866 MACAPA Oct 17, 2017 01:01 UTC

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