If you want to sail a course of 080, at a speed of 10 knots and you
sail thru a current having an ------------------ estimated
-------------------- set of 140 and a drift of two
knots
What would be your course and speed made good?.

089, 11.14 knots.

correction: that is an *estimated* 089, and an *estimated* 11.14 knots.

And even that *estimation* is off by whatever leeway you get from the wind,
whatever variation you get as to speed and direction, plus whatever variation
you get between the direction the boat points and which way it heads under
pefect conditions, plus whatever variation you get in pointing and speed due to
waves and wave direction and speed and height.