ten-inch shells at a distance of in a few days. The experiment proved that the older ballistic tables used by the Navy were inaccurate. Berkalov compiled the data from the 1908 exercise into the new tables adopted by the Navy. Another of Krylov's initiatives, rapid counter-flooding, was standardized in 1909. Two plans for modernizing the ship were put forward before World War I. In 1907 the Naval General Staff proposed a major reconstruction aimed at reducing her draft and raising her armor belt higher out of the water. Her above-water torpedo tubes, torpedo nets, auxiliary boilers and 47-millimeter guns would have been removed, her superstructure cut down and her rigging reduced to a single pole mast. These changes would have reduced her displacement by , but the plan was rejected due to a shortage of money. Her above-water torpedo tubes, however, were removed about this time. In 1912 the staff of the Black Sea Fleet proposed to replace all of her 47 mm guns with four guns and to remove the auxiliary boilers and the submerged torpedo tubes to offset the additional weight. The Naval General Staff did not think that this was worth the cost and rejected the plan. Even though these plans did not come to fruition, other alterations were made to Rostislav before the war. A dozen of her 37 mm guns were removed in 1906, and she was fitted with rangefinders, probably made by Barr and Stroud, in 1907 and 1908. In 1909 and 1910, Rostislav and the rest of the Black Sea Fleet prepared for joint operations with submarines. She was scheduled for an installation of the first Russian underwater acoustic communication system, but the installation was interrupted and her hardware was installed on the battleship (the former Potemkin) instead. During an anti-submarine exercise on the night of June 11, 1909, Rostislav accidentally rammed and sank the submarine Kambala. Twenty men of Kambala and two rescue divers died. The accident was blamed on reckless maneuvering by the submarine, and Rostislavs captain was cleared of any negligence or wrongdoing. Diplomatic incidents Before the outbreak of World War I Rostislav was involved in two minor international incidents. On August 11, 1911, and Panteleimon, two of the Black Sea Fleet battleships paying a state visit to Romania, ran aground on a shoal just off the port of Constanța. Rostislavs officers had detected the hazard and steered her to