Cut arched bulletproof glass with waterjet?

[douglasco]

I have a piece of 1.5" curved Bullet proof glass that has a high arch and has three layers. I don't think this stuff is tempered even though it does have a green tint to it. How do i cut it around the arch(curve), or cut it period?

[AKFALAR]

height control. We use a low-pressure pierce or an edge start to get the process going.

We normally do the layout with infinite dwell and just let the low pressure do the pierce. Once it goes thru you advance to the next hole/start.