Thanks Sam for the detailed explanation.

We have the very latest 530 without WAAS so it seems I am all set to cross
the Atlantic in the Archer.
Now when I fit the extra fuel tank and depart 300 lbs over gross weight am I
still legal to use the 530 as sole means of ocean navigation on the way home
to the England :-)

Thanks again,

Roy

"Sam Spade" wrote in message
...
Roy N5804F wrote:



I have a real problem with your statement that the 430/530 is not enroute
certified. They are all that is fitted into the bird I fly we fly IFR all
the time.

It is so certified. This really gets complicated, because the FAA has
created a moving target with all their changes.

You can use your 530 as sole means by doing an en route RAIM prediction
for the route.

Once the 530W has the update, you can use it as sole means without taking
any action for domestic flight.

The latest version of the 530 without WAAS, is approved for sole means for
oceanic because of FDE (fault detection exclusion).

The FAA has never really taken a firm position on what is primary for en
route, because the NAS is still predicated on VOR. This is very much an
FAA problem of being a horse and buggy aviation agency. ;-)