Dead reckoning (DR) plotting can be done directly on a pilot chart or on a plotting sheet. Of the various types of navigation, dead reckoning alone is always available in some form.
推算(DR)策划可以做一名飞行员图表上直接单的时候，或者在一个策划各种类型的导航、推算独自总是可用的某种形式。
Dead reckoning (DR) plotting can be done directly on a pilot chart or on a plotting sheet. Of the various types of navigation, dead reckoning alone is always available in some form.
推算(DR)策划可以做一名飞行员图表上直接单的时候，或者在一个策划各种类型的导航、推算独自总是可用的某种形式。
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