Given a text passage, come up with an appropriate title for it. The title should accurately represent what the main focus of the passage is. The title of a passage may be present in the first few sentences of the passage and/or be referred to multiple times in the passage. The title should be 1-5 words long.

Satsuma Province ( 薩摩 国 , Satsuma - no Kuni ) was an old province of Japan that is now the western half of Kagoshima Prefecture on the island of Kyūshū . Its abbreviation is Sasshū ( 薩州 ) .
Satsuma Province

A PT boat ( short for Patrol Torpedo boat ) was a torpedo - armed fast attack craft used by the United States Navy in World War II . It was small , fast , and inexpensive to build , valued for its maneuverability and speed but hampered at the beginning of the war by ineffective torpedoes , limited armament , and comparatively fragile construction that limited some of the variants to coastal waters .
PT boat

Mauna Loa 's most recent eruption occurred from March 24 to April 15 , 1984 . No recent eruptions of the volcano have caused fatalities , but eruptions in 1926 and 1950 destroyed villages , and the city of Hilo is partly built on lava flows from the late 19th century . Because of the potential hazards it poses to population centers , Mauna Loa is part of the Decade Volcanoes program , which encourages studies of the world 's most dangerous volcanoes . Mauna Loa has been monitored intensively by the Hawaiian Volcano Observatory since 1912 . Observations of the atmosphere are undertaken at the Mauna Loa Observatory , and of the Sun at the Mauna Loa Solar Observatory , both located near the mountain 's summit . Hawaii Volcanoes National Park covers the summit and the southeastern flank of the volcano , and also incorporates Kīlauea , a separate volcano .

Mauna Loa