on instruments

前置詞句

(aviation) (Flying) by reference to one's flight instruments, rather than by visual contact with the ground.

日本語の意味

計器参照飛行の状態、すなわち視界に頼らず飛行計器を用いて航空機を操縦する方式

Because of the low clouds, the pilot continued the approach on instruments until reaching the decision altitude.

低い雲のため、そのパイロットは判定高度に達するまで計器飛行で進入を続けた。

意味（1）

(aviation) (Flying) by reference to one's flight instruments, rather than by visual contact with the ground.

We were on instruments for the descent through the clouds.