罗盘航向或罗盘航线。未修正磁偏转或磁变。
Compass heading or compass course, before correction for magnetic deviation or magnetic variation.
该方法考虑了转场、等待储备油料和航线补偿油料的影响效应，并对机场高度和大气顺逆风影响进行了修正。
The effect of reser- ve fuel for diverting, holding and en route replenishing has been considered. The corrections for aerodrome pressure altitude and head and tail wind have also been done.
为了使模型更合理准确和具有经济意义，作者接着以铁矿石运输的典型航线——图巴朗到北仑宝山为例，加入期租市场的影响因素，再次运用误差修正模型拟合。
To get the reasonable and accurate forecasting model, two shipping routes of each of four important ship types:Capsize, Panamax, Suez, VLCC were studied by the method of econometrics.
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