White Sea–Baltic Canal had plans to carry 800,000 tonnes of fuel oil over the canal during 2003, and to increase the volume to in 2004. The fuel was transferred from Volgotanker river tankers to Latvian seagoing tankers at a floating transfer station near the Osinki Island in the Onega Bay of the White Sea, north-east of the port of Onega. Transfer operations began on 24 June 2003. But on 1 September 2003 a low-speed collision between Volgotanker's "Nefterudovoz-57M" and the Latvian "Zoja-I" during a transfer caused a crack in the "Nefterudovoz's" hull, with a subsequent oil spillage. Various estimates of the extent of
Onega stepanovi by an undivided zone. The surface of the undivided region of "Onega" is covered with small tubercles. "Onega" was originally described by Mikhail Fedonkin as a problematic organism, being grouped together with "Vendia", "Praecambridium" and "Vendomia" as possible stem-group arthropods due to a vague similarity with primitive Cambrian trilobites and arthropods. In 1985 Mikhail Fedonkin erected Phylum Proarticulata, in which he placed: "Onega", "Dickinsonia", "Palaeoplatoda", "Vendia", "Vendomia", "Praecambridium" and "Pseudovendia sp.", although he did not exclude the possibility that "Onega" may still be related to various lower Cambrian arthropods, such as "Skania". Andrey Yu. Ivantsov has proposed that "Onega" be