6. 某船自甲地(L49°33.0'S,λ5°55.0'E)依航向305°,航行279浬後駛抵乙地,則請以麥氏航法 (Mercator Sailing)推求乙地之經度為何?(A) 1°23.0'W(B) 0°18.0'W(C) 0°13.0'E(D) 1°18.0'E