In 1904 the Russian cruiser "Rossia" used what, first time it was used by a warship on high seas during a time of war?

Question

What ship, formerly called USS "Phoenix" which saw action in World War II, became the first to be sunk by a nuclear-powered submarine, in 1982?

Answer 1

Observation balloon
Rossia was the flagship of the Vladivostok Cruiser Squadron during the Russo-Japanese War. An observation balloon was flown off her quarterdeck to (unsuccessfully) locate Japanese shipping.