Chukotsk Peninsula, Dezhnev passed through the Bering Sea and sailed into the Pacific Ocean. Reign of Peter the Great Peter the Great established the modern Russian Navy. During the Second Azov campaign of 1696 against Turkey, the Russians for the first time used 2 warships, 4 fireships, 23 galleys and 1300 strugs, built on the Voronezh River. After the occupation of the Azov fortress, the Boyar Duma looked into Peter's report of this military campaign. It passed a decree on October 20, 1696 to commence construction of a navy. This date is considered the official founding of the Imperial Russian Navy. During the Great Northern War of 1700–1721, the Russians built the Baltic Fleet. The construction of the oared fleet (galley fleet) took place in 1702–1704 at several shipyards (estuaries of the rivers Syas, Luga and Olonka). In order to defend the conquered coastline and attack enemy's maritime communications in the Baltic Sea, the Russians created a sailing fleet from ships built in Russia and others imported from abroad. From 1703 to 1723, the main naval base of the Baltic Fleet was located in Saint Petersburg and then in Kronstadt. Bases were also created in Reval (Tallinn) and in Vyborg after it was ceded by Sweden after Russo-Swedish War (1741-1743). Vladimirsky Prikaz was the first organization in charge of shipbuilding. Later on, these functions were transferred to the Admiralteyskiy Prikaz (admiralty in St. Petersburg). In 1745 the Russian Navy had 130 sailing vessels, including 36 ships of the line, 9 frigates, 3 shnyavas (шнява — a light two-mast ship used for reconnaissance and messenger services), 5 bombardier ships, and 77 auxiliary vessels. The oared fleet consisted of 396 vessels, including 253 galleys and semi-galleys (called скампавеи, or ; a light high-speed galley) and 143 brigantines. The ships were being constructed at 24 shipyards, including the ones in Voronezh, Kazan, Pereyaslavl, Arkhangelsk, Olonets, Petersburg and Astrakhan. The naval officers came from dvoryane (noblemen, aristocrats who belonged to the state Russian Orthodox Church). The regular sailors were conscripts, drafted into military service. The service in the navy was lifelong. Children of noblemen were educated for naval service at the School for Mathematical and Navigational Sciences, which had been founded in 1701 in Moscow's Sukharev Tower. Students were often sent abroad for training in foreign fleets. The Navy also hired foreign nationals, with significant naval experience, to serve in the Russian Navy, such