a vista

計器なし（飛行） / 視認（射撃） / 視認、要求に応じて

英語の意味

without instruments (flight) / on sight (shooting) / at sight, on demand

Durante l'allenamento, il pilota praticò il decollo e l'atterraggio a vista per migliorare le sue abilità.

訓練中、パイロットは技量を向上させるために計器を使わず目視での離着陸を練習した。

During training, the pilot practiced takeoff and landing visually, without instruments, to improve his skills.