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- Q140 - Navigation Problems: Chart Plot
71. If you correct for the current in the preceding question (215°T at 0.5 knot) and maintain an engine speed of 7.5 knots, what is your ETA 0.5 mile south of buoy «W»?
To determine the ETA, correct the engine speed for the current, calculate speed made good, apply the speed-time-distance formula, and add the resulting travel time to the departure time, yielding an ETA of 1026.
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