The requested vessel with name MONTAUK and MMSI:0 and IMO:5619337 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
MONTAUK LIGHT N/A 368190000 Aug 20, 2017 22:48 UTC

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