On Wed, 30 Apr 2008 18:52:31 -0400, Pat Russell
wrote:
all the trouble of determining an accurate fix in three dimensions,

Is there somewhere in the specifications where it actually says this,
or are you just making an assumption here?

As far as I can tell, it can fulfill all it claims to by determining
lat & lon only. Did you mistakenly think you were buying an accurate
altimeter or something?