WARNING: a nearby science geek and grammatical pedant has been triggered. Automatic lecture mode has been engaged.
The "ecliptic" is the plane in which the planets of Sol system orbit the Sun. It has nothing to do with galactic navigation. The term you're after is "galactic plane".
Not saying you're wrong, but you know it's just a rethoric, right?
It was originally used for the apparent path of the sun over the sky, but generally, ecliptic means plane. It literally means something that orbits on the same plane as something else so eclipses can occur.
I have no problem with somebody using ecliptic to describe galactic plane because
a) it has fewer syllables so it's handy for us lazy people
b) galaxy is just a scaled-up version of the solar system anyway, with the only difference being that the matter didn't have time to bunch up into big clumps, yet. The fact that it has solar systems instead of gas and dust molecules doesn't mean anything on the universal scale. It will bunch up into big lumps orbiting even bigger lump in the middle.
Obit plane, galaxy plane, star system plane, it's all planes.
