Tanker Grigoriy Bugrov at 1420 Moscow time Oct 13 2011 collided in Caspian sea with unknown and uncharted underwater object and got a hole in engine room area portside, in position 44 28N 48 12E (37 nm NE of Chechen Island).

In a short time tanker capsized and sank on 8 meters depth with 27 deg portside list, half of the vessel being on the surface.

Crew 14 evacuated, no injures.

Tanker is loaded with 6000 mt of heavy oil, but no leak reported.

Tanker has double hull notwithstanding date of construction, because the vessel is of sea-river type, in former Soviet Union river-sea type tankers were built with double hull from the very beginning of their invention in late 60-th.

Tanker Grigoriy Bugrov (ex Volgoneft-244) IMO 8848628, dwt 6611, built 1974, flag Russia, manager Oil Marine Group. Tanker Grigoriy Bugrov, pic from http://forum.flot.su