"If you hit them right," said Travis on the helmet radio.

"Shuttle is perfect and operational," he reported through his helmet radio.

It did not help that the Rams continued to have problems with their helmet radio.

"Come this way," it ordered, speaking through his helmet radio.

Now the noise level in the captain's helmet radio suddenly dropped.

"I love you John" she said into her helmet radio.

I received the next orders of the command station over my helmet radio.

Loud calls were reaching me, coming from my helmet radio.

Five minutes later he stepped outside and keyed his helmet radio.

Struck by a sudden thought, he activated his helmet radio.