When he was making a proper approach, at a safe altitude, the light would glow green.

Pulling back, Adams started climbing to reach a safe altitude.

Now he was able to zoom back to a safe altitude.

The first sign of firing, he probably would lift off, and wait at a safe altitude for his troops to return.

They can operate day and night close to land below lowest safe altitude.

As usual, he was riding on the general's right wing when they began to climb up to a safe altitude.

Our priority will be to boost the station to a safe altitude.

The test pilot was able to maintain control, and climb to a safe altitude.

You're cleared now to any safe altitude above seven thousand feet.

Milton dropped to four hundred feet, a safe altitude under normal circumstances.