Thanks for all this useful and very informative info regarding this vessel ownership

The change of logo apparently signifies a change in who now owns or handles the bunker fleet of Salvu Zammit Co.Ltd. [as they describe themselves at http://go.bunker.com) or Salvu Zammit & Sons Ltd. [most other references] and for whom the latest livery has previously been uploaded by Emmanuel 10.11.2011. The operator at Salvu Zammit from 8/2011 to 6/2012 is given as Mario Zammit who became the operator of Go Fuels Ltd. and Gaulos Shipping Co. Ltd. from 7/2012 and the fleet of bunker barges etc which had previosly been shown under Salvu Zammit & Sons Ltd. as licensed commercial veassels by Transport Malta at 9.5.2012, from 13.10.2012 are shown under Go Fuels Ltd. and the new logo obviously fits this company. What the actual status of Mario Zammit is i.e. owner or just an employee, is unclear.