The procedures and its analyses to determine compasserror by GPS at sea;
利用《航海天文历》查表的方法来获得罗经差的计算过程比较复杂。
2
Take celestial azimuth and find compasserror on each watch if the weather is fine.
如天气好，每一班测取天体方位求出罗经差。
3
To calibrate and compensate the compasserror of magnetic heading in a carrier with constant pitch Angle, the deviation compensation algorithm (DCA) for magnetic deviation compensation is put forward.