Line tactics were still used. It was the easiest way for an admiral to command his fleet by simply telling the other ships "Follow me and do what I do." Ships could bring more of their guns to bear by shooting at a target off to the side rather than a ship dead ahead or astern. At Tsushima Admiral Toga executed every admiral's dream tactic of crossing the Russian T. Togo's ships were the cross bar of the T while the Russians were the stem. Togo's ships could therefore bring all their guns to bear while the Russians could only engage with their forward guns.Thank you for your replies. Rgearding the naval warfare of this war and period, what kind of ship formations / naval tactics were used in battles such as Port Arthur, Ulsan, Tsushima? I am not familiar with naval tactics of this period, I am more familiar with naval warfare of 18th century and early 19th century, but I guess Napoleonic era is far from this period, where ships were arranged in line formations and very close to the enemy fleet. However, in this war, with a wide variety of ship classes: Battleships, armored and protected cruisers, destroyers, torpedo boats, my guess is ships in line formations were no longer feasible.
There were new weapons coming into use besides just guns. At Tsushima both the torpedo and the mine sank ships. Scout ships used radios to inform Togo of Russian movements beyond visual range from the flag ship. Electric search lights were used in night fighting. Gun ranges had increased significantly since Trafalgar. At Tsushima, some of the biggest guns were able to fire 14 km.