Dave,

I too had trouble with the "Vector" but as the discussion has gone on,
vector just might be the right term

There has to be an angle back to the starting point as well as distance,
Both vector facters,

I'm not sure how you can say speed made good when we have no knowledge
of the distance or the speed of the trip. ( I believed he said constant
speed for the four legs)

What we have is Course heading and time of each of four legs.sailed on
an ocean. One question, a line(vector) drawn between the start and
completion without a name.

Ole Thom