rhumb-line course恒向航线
rhumb-line distance[航] [水运] 恒向线距离
rhumb-line error[航] [水运] 恒向线误差
rhumb b line等角航线
Rhumb-line斜航线
oblique rhumb line[测] 斜轴投影无变形线;斜切恒向线
rhumb line sailing航法;墨卡托航迹计算法
biber fictitious rhumb line虚构恒向线
rhumb line track恒向线航线
N（名词） an imaginary line on the surface of a sphere, such as the earth, that intersects all meridians at the same angle 恒向线