Japanese Ammo (Misa)

@japaneseammo みさ先生，一質問を聞かなきゃ。 敵巡洋艦の撃沈を確認。 http://Jisho.org  says that 撃沈 and 確認 are -suru verbs, but how is it used this way without -suru? That sentence is from the game World of Warships. I set the language to Japanese.