Making the rounds this time is what appears to be a prison ship, that a caption claims could facilitate the deportation of illegal immigrants from the US “in a safe, secure manner.”
The ship pictured is actually the British HMS Prison Weare, a ship that was built in 1979 by a Swedish company, used to house prisoners during a UK conflict and some New York drug-crime prisoners (exact dates uncertain), then decommissioned by Britain in 2005 and sold in 2006 to “Sea Trucks” in the UK and re-commissioned as “Jascon 27” for use as housing for off-shore Nigerian oil workers.
For reference, see this BBC article from 2010, the Weare’s wikipedia entry, a farewell entry in the Portland Port (UK) newsletter (PDF).