30. 某船自澳洲Sydney (34°S, 151°E)採大圈航法駛往巴拿馬Balboa (09°N, 079°W)。請用 229表求大圈距離(D)及初航向(Cn)?
(A)3128.1';106.6°
(B) D3128.1';253.4°
(C) 7671.9';106.6°
(D) 7671.9';253.4°
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統計: A(40), B(88), C(321), D(82), E(0) #1799222
統計: A(40), B(88), C(321), D(82), E(0) #1799222