You sail directly East for 14 hours,
then South for 14 hours,
and then West for 14 hours,
and then North again for 14 hours.

Now if you draw a vector

you can't draw a vector between positions without knowing (in this case) speed
over ground. The distance between positions is a scalar, the direction is not
determinable from your data.

between your starting
position and your final position. What would you
call that vector?