着ちゃく発はつ信しん管かん

noun

impact fuze; contact fuze; percussion fuze; direct-action fuze

Military term for a fuze that detonates on impact with a target. The kanji 着発 (arrival/departure) combined with 信管 (fuze) literally suggests a fuze that activates upon arrival.

• この砲ほう弾だんには着ちゃく発はつ信しん管かんが装そう着ちゃくされている。

  This artillery shell is fitted with an impact fuze.