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They can fly in moderate gales, though Manna chooses not to, has redundant batteries and flight computers, and a parachute for gentle descents if a "one in 10 million" failure happens.

In the afternoon the wind increased to the force of a moderate gale and the sea began to rise.

By ten o'clock the wind had risen to the strength of a more than moderate gale, and the sea in proportion.

The cold increases: thermometer has fallen to -47½°, although blowing a moderate gale at the time, and the atmosphere dense with mist.

Even a moderate gale would tear a pack apart, to be broken into smaller fragments by the water.