- X forward,
- Y to the right,
- Z down (towards the earth as in Positive Gravity)
When HVOSM was first developed in the late 60s space travel was on the rise so they wanted a general purpose program that could simulate in near zero gravity (HVOSM can still do that! since Gravity is an input)
So Ray used flight conventions for coordinates
Flight conventions: This was from The SAE Coordinate Conventions are the same as for flight: Here is the HVOSM Coordinates: NOTE: Some programs use Cartesian Coordinates.
Like the screen you are reading this on.
X goes across, Y goes UP, and Z comes out at you.