Prior to the annexation of Crimea, divergent announcements were made concerning the future composition of the fleet. In June 2010, Russian Navy Commander-in-Chief Admiral Vladimir Vysotsky announced that Russia was reviewing plans for the naval modernization of the Black Sea Fleet. The plans include 15 new warships and submarines by 2020. These vessels were to partially replace the reported decommissioning of "Kerch," "Ochakov" (decommissioned in 2011 and sunk as a blockship in 2014), several large support ships, and a diesel-electric submarine. Also in 2010, Russian Navy Headquarters sources said that, by 2020, six frigates of Project 22350 "Gorshkov"-class, six submarines of Project 677 Lada-class, two large landing ships of Project 11711 "Ivan Gren"-class and four class-unspecified ships would be delivered. Due to the obsolescence of the Beriev Be-12 by 2015, they would be replaced with Il-38s. Sukhoi Su-24M aircraft were planned to be upgraded to Su-24M2 at the same time.