on instruments

Prepositional phrase

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

Japanese Meaning

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。

Sense（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.