"Back to Steve's question for a minute. As noted by Larry and others, the 120V system is pretty much for convenience outlets and lighting. It's a 120V (or maybe 110V) plain delta, meaning there is no neutral. And as mentioned above, there is no bonding of any point in the electrical system to ground (hull). So the electrical systems float. You will read 120V phase to phase, and unpredictable values phase to ground because the electrical system is floating."
This is exactly what my friend Dan described. And that there was no neutral.
"Same with the 450V system, you'd read 450V phase to phase but unpredictable voltages between any point in the system and ground (hull)."
I don’t think he said anything about this, so am not sure if he measured it or not.
Thanks all for the info.