飞船驾驶员，气球驾驶员轻于空气的航空器，例如气球的驾驶员或导航员。
A pilot or navigator of a lighter - than - air craft, such as a balloon.
就轻于空气的民用航空器而言，飞行中是指自其离开地面时起至其重新着地时止。
In the case of a civil aircraft lighter than air, the expression in flight relates to the period from the moment when it becomes detached from the surface until it becomes again attached thereto.
就轻于空气的民用航空器而言，飞行中是指自其离开地面时起至其重新着地时止。
In the case of a civil aircraft lighter than air, the expression in flight relates to the period from the moment when it becomes detached from the surface until it becomes again attached thereto.
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