The pilot noticed this most in the control column, with handling becoming more difficult.

Suddenly, our pilot noticed that the temperature of the submarine's skin was starting to rise.

The unexperienced pilot didn't notice loss of oil pressure and continued the flight.

Whether the pilot noticed or not, the helicopter flew off.

After all, how could the pilot have noticed we were gone?

The pilot will not notice any abnormal behavior of the model in the 1/500th of a second that they are interfering.

"Surely the pilots themselves noticed they were becoming ill and dying after certain numbers of trips."

The pilot noticed the ship didn't seem to be moving.

Probably the pilot wouldn't have noticed them, or troubled about them if he did.

After several minutes on this route, the pilots noticed a small yellow circle getting out of the craft.