The requested vessel with name SLIP AWEIGH and MMSI:338142454 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
SLIP AWEIGH N/A 367573630 Apr 06, 2017 13:47 UTC

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