Hi All.
As most who have posted on this subject, it would be a good thing that SBAS/WAAS be implemented in this part of the world.
The company I work for operate regional jets that are IRU (radio updating only) a/c.
We investigated various ways to integrate GNSS into the a/c to provide RNP LNAV approach and possibly Baro VNAV.
One option looked at:
http://www.esterline.com/Portals/17/...us/cma5025.pdf
Unfortunately we didn't proceed with this, as this system requires WAAS or GBAS to operate (on the GBAS option, if it became more widespread across the country, it maybe a attractive option for legacy a/c). But the whole idea of it was to provide a RNP approach capability at regional aerodromes.
No WAAS, and it wouldn't operate.
Now if WAAS were to be a reality here. It's a system that would be attractive and relatively easy to install.
Also it provides a distance to run to the DA (LNAV/VNAV or LPV) which would be handy for constant rate descents from 10nm (intermediate fix). Eg it emulates a ILS display in the flightdeck.
Canadian North installed this system on their 737-300. It works alright for them:
Avionics Magazine :: Canadian North 737 Certified for GPS/LPV
In the case of new build Airbus and Boeings, yes they can get by using RNP-AR. Installing a system such as this one or similar on offer from other avionics manufactures, would only benefit Regional turboprop and jet types in this country.
Regards.
K-Ex.