If immediate descent isn't possible (due to inclement weather, for instance), there are some options to help treat the condition.

If symptoms persist or become worse, however, immediate descent is necessary; even 500m can help.

While climbing between 12,000 and 13,000 ft, all electrical power was lost; the crew requesting an immediate descent.

Fortunately, Dr. Bellis realized what was happening and ordered the correct treatment: an immediate descent.

The Sheekhal are closely associated with the Harari people, as both groups claim immediate descent from the Sheikh Ar-Rida.

Harper had been all for an immediate descent on the camp, both men in uniform, but, tempting as the prospect was, Sharpe had decided against it.

"Demand immediate descent and surrender, One."

He ended his exposition by observing that in view of the lateness of the season he would respectfully suggest an immediate descent.

Alzheimer's disease isn't an immediate descent into forgetfulness.

The maneuver resulted in her immediate descent into the canal.