noun
Refers to the device or system that automatically controls a vehicle, especially aircraft and ships.
パイロットは自動操縦装置を作動させた。
The pilot activated the autopilot.
オートパイロット is a common loanword synonym, often used in casual or general contexts, while 自動操縦装置 is a more formal, technical term.
Compound of 自動 (automatic) + 操縦 (steering, piloting) + 装置 (device, equipment).