The requested vessel with name GROWLER and MMSI:235054156 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
GROWLER N/A 235116931 Feb 25, 2018 21:34 UTC
GROWLER N/A 250003932 Feb 17, 2018 16:44 UTC
GROWLER N/A 338096509 Oct 22, 2017 17:26 UTC
GROWLER N/A 250001088 Aug 18, 2017 11:59 UTC

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