As if they were aboard a dirigible losing altitude, GM's bosses have been frantically throwing all manner of stuff overboard — retiree health-care benefits, people, assets, new car design — to conserve $5 billion. That will get it through the year.
height above sea level:
We are currently flying at an altitude of 15 000 metres.
Mountain climbers use oxygen when they reach higher altitudes.
━━ a., n. 【航空】操縦しうる; 飛行船.