Imagine we want to go to Alpha Centauri,
Let's assume we are at position {100, 100, 100}
and the star is at position {1000, 1000, 1000}
.
Is this way of positioning (cartesian coordinates) sufficient for such journey ?
What I mean by that is, in real life generally things are more complex than a simple vector, there are certain roads you must take, things you'd want to avoid and so on. And here you have GPS which while does the positioning it also has a database of places/routes etc ...
Like when going to the moon, while it's clear on where to go, it is not a matter of going on a straight line, you have to avoid stuff like space debris around earth and so on (simplified example).
Question:
What would one need when travelling far in space, beside destination coordinates ?