Dehaene:
Hello,
Ile de Sein can be approximately located with this specialized web site:
AISLIVE - IMO search
Hi Dehaene,
I think the Ile de Sein has been out of AIS range for over a couple of days now, so any position shown is probably the last one that was received.
You might want to try this site
ILE DE SEIN - 9247039 - Vessel's Details and Current Position it give more detailed info and uses Google Maps to plot the vessels when they are in range. Note under the last position received the Info Received data and time.