During the Second Schleswig War in 1864, he commanded the ship of the line on a deployment to the North Sea, again under Wüllerstorf. He did not see action, as an advance squadron Wilhelm von Tegetthoff had broken the Danish blockade of the northern German ports at the Battle of Heligoland. Following Wüllerstorf's retirement, Pöck became the adjutant of Archduke Leopold, the new head of the Austrian Navy. During this period, Pöck was promoted to the rank of Rear Admiral. During the Seven Weeks' War against Prussia and Italy, Tegetthoff was placed in command of the battle fleet. Pöck was instead assigned as the naval liaison for Archduke Albrecht in Venetia. Pöck replaced Tegetthoff as the fleet commander after the latter became the Navy chief, a position Pöck held until January 1870. He was then promoted to the second in command of the Navy, though he succeeded Tegetthoff after his untimely death in April 1871. This role filled two positions, with Pöck serving as the "Marinekommandant" and the Chief of the "Marinesektion". Rear Admiral Georg von Millosicz in turn took Pöck's previous position as second in command.