教轴承，分成三角形，情节坐标格子，补偿偏斜并且读地志的地图。
Teaches bearings, triangulate, plot co - ordinate grids, compensate for declination and read topographic maps.
教轴承，分成三角形，情节坐标格子，补偿偏斜并且读地志的地图。
Teaches bearings, triangulate, plot co-ordinate grids, compensate for declination and read topographic maps.
教轴承，分成三角形，情节坐标格子，补偿偏斜并且读地志的地图。
Teaches bearings, triangulate, plot co-ordinate grids, compensate for declination and read topographic maps.
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