Sailing in the strait of kurushima in japan 日本来岛海峡航法
Tacan uhf tactical air navigation 极超短波?术航法无线标识
Long range navigation 长距离航法方式
It was cloudy ; and the captain had to calculate our position by dead reckoning 空中阴云密布,船长不得不用罗盘测航法以确定我们的位置。
The english method has two shortcoming in the long time " s practice . firstly , the precision can not meet with the need . secondly , it is complex 在长期的实践中,强制自航法有如下缺点: 1 -测量精度不理想。