"Steven P. McNicoll" wrote in message =
hlink.net...
=20
wrote in message =
...

He did not say that right. There is VOR/DME-RNAV as well as
INS RNAV, IRS RNAV, GPS RNAV, and LORAN RNAV.

=20
IRS RNAV?
=20
=20

Not commonly used, because of the high tax rate, maybe?