The requested vessel with name PORTMAN and MMSI:0 and IMO:5282885 is temporary not in our database.
Perhaps you mean one of the following ships:

Vessel name IMO MMSI In range Destination Last report
PORTMAN 9149213 538006607 SAUPE Jan 01, 2018 13:05 UTC
PORTMAN SQUARE 9264570 636016717 FIUMICINO Feb 19, 2018 14:10 UTC
PORTMANY N/A 224007090 Oct 31, 2017 13:39 UTC

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