29/01/2018, Las Palmas de Gran Canaria, Spain.

Built in 1984 by Maclaren BA, Rio de Janeiro, Brazil (274).
299 g.t. and 376 dwt., as the platform supply/tug
'Astro Cheme' to 1994,
'Maestrale Secondo' to 2008,
'Vos Maestrale' to 2015 and
'J Socas' since.

Built as an offshore platform supply and seems to have been in use as such up until 2015, when bought by SAPCAN of Las Palmas, these days the vessel appears to be always on standby and I believe it's role is as a pollution control vessel.

Incidentally the ship's name refers to SAPCAN's owner, Juan Socas.