求翻译：Dead Reckoning相对Live Reckoning而存在，两者均语出17世纪大航海时代，简单理解为，当看得见太阳或者岛屿来定位就是Live，当不见日月通过转舵角度和速度时间来计算当前位置就是Dead是什么意思？

dead reckoning relative to the live reckoning existence of both a phrase from the 17th century Age of Discovery, understood as a simple, see the sun or the island to locate is live, but not the sun and the moon through the steering angle and speed time to calculate the current position is dead

Relative Live Dead Reckoning Reckoning existence, both of which are made by 17th-century era of great sailing ships, and simple to understand, when you can see sun or island to locate the missing Live is moon through steering angle and speed time to calculate the current position is Dead

Dead Reckoning relative Live Reckoning exists, both even language leaves the 17th century big navigation time, the simple understanding is, when can see the sun or the islands locates is Live, when does not see the livelihood through to transfer the rudder angle and the speed time calculates the cur

Relative Live Reckoning and Dead Reckoning, both of which language the 17th century great navigation era, simple to understand, when you can see the Sun or island to locate is Live, when no Moon steering angle and speed time to calculate the current location is Dead

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