Great info everyone. Let's say that for some reason I penetrate a wreck and hack off the cable to the Shearwater primary display.
Are the HUD brains controlling the PO2 (it looks like it from the photos)? Additionally, is the cable permeated with some type of water resistant potting material? I know I am nit-picking, but sometime soon I have to get off the fence and decide whether to go back to computers or stick with my Wet notes / hard table regimen.
Wet Notes are great, but flipping pages in a nasty current is a pain.