On 10 August 1904 the Imperial Russian Navy and the Imperial Japanese Navy had one of the longest-range gunnery duels to date—over —during the Battle of the Yellow Sea. The Russian battleships were equipped with Liuzhol range finders with an effective range of , and the Japanese ships had Barr &amp; Stroud range finders that reached out to , but both sides still managed to hit each other with 12-inch fire at . Naval architects and strategists around the world took notice.