The Horus Vision has a Handspring Visor and a chip loaded with a program capable of what we need, including angle changes, wind, BP, Temp etc. $240.00 for everything. I talked to Dick B. over there and this is the model we need for use in the field he says. Used with any other palm device, the program is lost when the batteries go dead. It then needs to be reloaded while connected to a laptop or desktop PC containing it too. This is not necessary with the Handspring Visor unit, it contains the info on the chip so new batteries just need to be installed then turned back on.
I'll be getting one in a couple weeks and will let everyone know how it works out.
HandSpring Visor With Module and program