Both vessels were carrying approximately 4,000 tons of fuel oil on board each, according to Baza.
"There's a bow and there are two ships , torn in half,"
— more footage from the site of the wreck of Russian tankers in the Kerch Strait.
The Russian Emergencies Ministry officially confirmed that the Volgoneft-212 and Volgoneft-239 are sinking. An MI-8 helicopter has been dispatched to the scene. There are 13 people and fuel oil on board the Volgoneft-212, and 14 people and oil products on board the Volgoneft-239.
"More than 50 specialists and 11 pieces of equipment are already involved in eliminating the consequences. Further information is being clarified," the Ministry of Emergency Situations reports.
They were rusty ass 50 year old ships that had the middles cut out of them and the ends welded together so they would be shorter, but keep getting used. They busted apart at the welds, and I don't even think they were supposed to still be being used as ocean tankers anymore. They were supposed to be on rivers after the hack job.
Mash reported that both tankers were built around 50 years ago and were hastily converted in the 1990s from full-fledged tankers to "river-sea" class vessels.
The rushed modifications included cutting the ships in half, discarding the center, and welding the bow and stern together, leaving a large seam that failed under the impact of powerful waves. This seam ultimately split apart, contributing to the vessels’ sinking.
The excerpt adarza commented likely explains it somewhat. Ships made shorter by cutting a section of the middle out & rejoining the ends. They probably both had the same modification around the same time, so reached a point of similar wear and (literal) tear at the same time. I'll bet they forgot about their history and neglected to perform the more thorough integrity checks they required because of it.