The requested vessel with name SEAVIEW and MMSI:23503515 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
SEAVIEW N/A 244690667 LIXHE<>ST LENAARTS Feb 12, 2018 06:18 UTC
SEAVIEW N/A 227365120 Oct 19, 2017 11:53 UTC
SEAVIEW N/A 265572710 Sep 17, 2017 10:17 UTC

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