blind spot (e.g. of a driver)
dead angle; dead ground; dead space; sector without fire
この位置は防犯カメラの死角だ。
This spot is a blind spot for the security camera.
運転中の死角に注意すべきだ。
You should watch out for blind spots while driving.
計画の死角を指摘された。
A blind spot in the plan was pointed out.