$\"\"$

A ship leaving port sails for $\"\"$ miles in a direction of $\"\"$ north to east.

$\"\"$

Trigonomeetric ratio : $\"\"$ .

From the figure, adjacent side $\"\"$ , hypotenuse $\"\"$ and $\"\"$ .

$\"\"$

Therefore, the starting point of the ship to north is approximately $\"\"$ .

$\"\"$

The correct choice is F.