Without going into a long discussion.....Not flight level 25,000 feet. Call it 25,000 feet ..... leaving off the "flight level". In very simple terms, over the U.S., an altitude 18,000 feet or above is termed as Flight Level (knocking off the last two zeros) since the altimeter reference is set to 29.92 in Hg for flight operations. Lower than 18,000 feet, the altitude is the indication read directely off the altimeter, set to a "local" (within 100 miles) altimeter setting....(Ex...ATIS mentions the alitmeter setting). Walter DCA ----- Original Message ----- From: "Richard A Whitenight" <rum.runner@juno.com> To: <AIRLINE@LISTSERV.CUNY.EDU> Sent: Sunday, December 30, 2001 15:36 Subject: Re: Contrails > When you guys speak of FL250, are you saying "Flight Level 25,000"? > > On Sun, 30 Dec 2001 14:27:22 -0600 Dennis Murphy > <dmurphy4@houston.rr.com> writes: > > Way back when.......... > > > > I've pulled contrails with my Cessna T-210 (circa 1974) over > > Colorado & > > Kansas in the winter. My Bonanza A36TC would do the same. I don't > > remember > > what altitude, but I do remember it was lower than FL250 (maximum > > "certified" ceiling on both aircraft.) For what's worth, the > > Bonanza was > > more "fun" to fly......... > > > > Dennis Murphy > > > > ----- Original Message ----- > > From: "W Wilson" <wlw-jr@att.net> > > To: <AIRLINE@LISTSERV.CUNY.EDU> > > Sent: Saturday, December 29, 2001 10:05 PM > > Subject: Re: Contrails > > >