home *** CD-ROM | disk | FTP | other *** search
- Path: sparky!uunet!das.wang.com!ulowell!m2c!bu.edu!stanford.edu!ames!decwrl!olivea!sgigate!sgi!fido!loki.esd.sgi.com!jeffg
- From: jeffg@loki.esd.sgi.com (Jeff C. Glover)
- Newsgroups: alt.radio.scanner
- Subject: Re: Scanners in Airports and on Planes
- Keywords: scanner airport planes
- Message-ID: <1k50rdINN6qb@fido.asd.sgi.com>
- Date: 27 Jan 93 03:51:09 GMT
- References: <C1Dsrv.4uE@world.std.com>
- Distribution: usa
- Organization: Silicon Graphics, Inc., Mountain View, CA
- Lines: 82
- NNTP-Posting-Host: loki.esd.sgi.com
-
- rcooper@world.std.com (ron w cooper) writes:
- >Does anyone have any experience using a scanner in a major airport? Do
- >the security guys give you any trouble ? Are there any rules (FAA etc)
- >that prohibit you from using a scanner on planes ?
-
- Since I've seen so much speculation being posted on the regulation,
- here's the actual text from the FAA regulations:
-
- FAA Regulations [ emphasis mine ]:
-
- Part 91 (1-1-90 edition)
-
- 91.21 Portable Electronic Devices
-
- (a) Except as provided in paragraph (b) of this section, NO PERSON MAY
- OPERATE, nor may any operator or pilot in command of an aircraft allow
- the operation of, ANY PORTABLE ELECTRONIC DEVICE on any of the
- following U.S.-registered civil aircraft:
- (1) Aircraft operated by a holder of an air carrier operating
- certificate or an operating certificate; or
- (2) Any other aircraft while it is operated under IFR
-
- (b) Paragraph (a) of this section does not apply to --
- (1) Portable voice recorders;
- (2) Hearing aids;
- (3) Heart pacemakers;
- (4) Electric shavers;
- (5) Any other portable electronic device that the OPERATOR of the
- aircraft has DETERMINED WILL NOT CAUSE INTERFERENCE with the
- navigation or communications system of the aircraft on which it is
- to be used.
-
- (c) In the case of an aircraft operated by a holder of an air carrier
- operating certificate or an operating certificate, the determination
- required by paragraph (b)(5) of this section shall be made by that
- operator of the aircraft on which the particular device is to be used.
- In the case of other aircraft, the determination may be made by the
- PILOT in command or other operator of the aircraft.
-
- ==================================================
-
- What's all that legal gobbledegook mean? Basically, you can't use a
- radio on a commercial flight.
-
- Yes, even if the pilot says it's OK, it's not OK. Read that last
- paragraph carefully -- "OPERATOR" != "PILOT" for most commercial
- flights. And it doesn't say diddly about the OPERATOR assigning that
- responsibility to the PILOT. That is, United Airlines can't allow it's
- pilots to determine on the spot whether a device is legit or not; they
- (United Airlines) have to determine FOR A PARTICULAR PIECE OF EQUIPMENT
- and FOR A PARTICULAR AIRCRAFT ON WHICH IT WILL BE ALLOWED.
-
- Realistically, if the pilot says it's OK, you're not likely to be
- prosecuted. However, if an FAA inspector were aboard, noticed and
- decided to act, the PILOT and OPERATOR could be subject to fines and/or
- prosecution.
-
- Replace "Radio" in all the above with "Any Electronic Device", and you
- also exclude computers, NES gameboy, CD Players, etc. Most airlines
- have issued "determination" results for laptops and cd players.
-
- The radio navigation problems involved in the prohibition have to do
- with the FM broadcast band and the signals used for radio navigation.
-
- FM broadcast band is approximately 88MHz to 108MHz. Radio navigation
- signals used in aircraft are from 108MHz to 118MHz. When mixed with
- the IF (10.7MHZ) of common (scanning) receivers, the FM broadcast band
- signals mix to produce signals in the radio navigation band. The
- signals are often stronger than the weak navigational signals used by
- aircraft.
-
- I've experimented in a private plane using my scanner while flying and
- observed deviations in the VOR of 40 degrees. Simply turning the
- scanner off "resets" the deviation; turning it on brings it back.
-
- Would you want to be on an airplane in the clouds, in severe turbulence
- while some joker back in coach is trying to listen to his FM radio or
- scanner? The airplane drifts 40 degrees off course, and ends up in the
- side of some cumulogranite.
-
- Jeff
- jeffg@sgi.com
-