49. 自澳洲露紋角Cape Leeuwin(35°S, 115°E)航向亞丁灣Gulf of Aden(13°N,55°E),經查表得知緯度13°及35°的緯度漸長比數單位(meridional parts)分別為781.6及2231.1,請計算起迄點間的恆向線航向(rhumb line course)?
(A)289°
(B)299°
(C)310°
(D)320°
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統計: A(3), B(6), C(20), D(4), E(0) #3316620
統計: A(3), B(6), C(20), D(4), E(0) #3316620