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air boat 用在空氣中旋轉的螺旋槳推進的平底船。

air borne

For civil purpose . the biggest advantage of the flying air boat is that it can anything that a plane can do but at the cost roughly of one tenth , the time of staying in the air is very long ranging from 24hr . - 72hr . , 飛艇最大的優點是凡是飛機能做的事飛艇幾乎全能做,但飛行成本比飛機便宜十幾倍,留空時間長,一般飛艇空中飛行時間可達24小時- 72小時,以上這些均是大型飛艇。