1、You are approaching reference line of fairway.
你船正接近航道的參照線。

2、You are on reference line of fairway.
你船在航道參照線上。

3、Type the reference line offset from the inside of the wall over which the window will be placed.
輸入與要安裝窗戶的墻壁內側之間的參考線偏移。

4、Store the offset from the reference line of the wall over which the door will be placed.
存儲與將安裝門的墻壁的參考線之間的偏移。

reference line翻譯