We are considering Class 1 vs 2 at this point. We need to get clarification from the regulator as to what exactly constitutes a mounted unit, as the Canadian AC is not entirely clear on the definition whereas the US AC is. Are we talking screwed into the aircraft or is a velcro attachment to the existing approach plate holder also considered mounted?
Ideally, we'd like something fairly simple like a suction (RAM) mount, but any solution, simple or complicated, will be considered in the business analysis.
The solution will have to be common and work for a variety jet transport category aircraft.
Thanks to everyone for the info provided thus far.