Ini saya kutip lagi dari
http://www.indoflyer.net/indoforum/tm.asp?m=96306&mpage=1&key=handphone
yang membahas pengaruh handphone pada saat terbang.
Banning the use of Cellphones in flight:
1. The conspiracy theory:
1.a. Supaya pada nggak cerewet dipesawat. Dah bayar kelas bisnis, mau
siapin presentation pas dipesawat, eh, disebelah ada orang cerewet
teriak2 di HP... Oh Bugga!
1.b. Increased derivative sales... pake telpon yang ada di pesawat dan
bayar US$3 - 10 per minute tergantung airlinenya.
2. The fictional version:
2.a. It'll interfere the controls and electronic signals and make it
fall out of the sky. This is fiction! Salah satu requirement dari
sertifikasi adalah "resistence to interference"... Keganggu sih wajar,
tp jatuh karena itu? Errr... No!
2.b. It has been proven to cause fatal interference. No... tests have
failed to replicate the interference. However, it IS STRONGLY
SUSPECTED with scientific basis, that cellphones MAY CAUSE
interference. This risk, especially on instrument approach situation
is what causes the ban!
3. Known fictional accidents where cellphones were accused falsely:
3.a. Tambolaka incident. Carrier has a history of IRS abnormalities.
If NAV position update and correction to IRS position was used, it is
inconceivable that interference from a cellphone block out NAV signals
OR cause NAV signals to have been mistranslated to the extent of
>100NM error. If an interference was the cause of the deviation, crew
should have noticed a degradation in RNP and a diverging FMC position
from each source.
3.b. Wrong landing at Tabing instead of Minangkabau. It is impossible
for a cellphone to cause the deviation. Whilst interference would have
caused a slope mistranslation, the glideslope would still create an
error slope to the glideslope transmission. Same goes to the
localizer. Crew approach monitoring procedures should have picked up
abnormal descent rates or headings. Actual cause is known but somehow
is not allowed to be released to the public.
4. The facts:
4.a. Cellphones use digital signals. New aircraft using digital FBW
and FADEC is known to have been affected by interference, especially
in low altitude (critical phases).
4.b. Erroneous fuel readings caused by cellphone interference have
been noted.
4.c. Bigger risk lies on systems WITHIN the airframe and not signals
the aircraft received from outside the airframe (metal cage effect).
4.d. Gw pernah nyalain HP pas disebelah IRU dan disebelah DGPS
antennae... (both unshielded) resulting in "Funny" effects. "Tests"
done on ground and inflight, no life endangering deviations noted.
4.e. It is BLOODY ANNOYING to hear handphone signals while talking on
the radio!
5. The Law:
5.a. If it's Illegal, IT'S ILLEGAL! It's the LAW!
5.b. Failure to comply to company regulations or crew instructions MAY
CAUSE in you committing an unlawful disobedience to the flight crew,
which is enough for a criminal prosecution.
Gerry
------------------------------------
The cell phone ban went into effect in 1991, mostly to eliminate the
possibility that cell phone calls on airplanes would interfere with
cell conversations on the ground, as well as with the airplane's radio
communications.
The study, by CMU's Department of Engineering and Public Policy, found
that the use of cell phones and other portable electronic devices can
interfere with the normal operation of critical airline components,
even more so than previously believed.
Researchers concluded that such devices can disrupt the operation of
cockpit instruments, including the Global Positioning System receivers
that are becoming more common in helping to ensure safe landings.
The FCC cited effects of "frequency re-use," which is a fundamental
cell phone principle that's helped mobile phones proliferate
worldwide. The signal from a cell phone doesn't go on forever; the
energy to propel it dissipates after a number of miles, and it
dissipates more quickly if it bounces off buildings, hills and other
obstacles. This allows the same frequencies to be re-used by operators
in different markets sometimes just a few miles apart.
A cell phone signal falling to Earth from a phone aboard a plane
encounters no significant obstacles to slow it down, so it's strong
enough to reach the ground and find a network on its particular
frequency. But if the airwaves belong to a different operator, there's
likely to be "noise" and other forms of interference for everybody,
the FCC believes.
--
Salam
A. Yahya Sjarifuddin.
almasdi rahman wrote:
PIlot kita aja kayak begitu, sabil nyetir pesawat sambil ngaHp
ya....gimana mau selamat penerbangan kita
cing..................he.....................he..........................dikasih
kuliah bahwa Hp bisa nganggu penerbangan pesawat, dasar ORng
Indonesia.........................
Pastiwaktu kuliah pilot tuh orangnya sering
bolosss...................lossss.................
wassalam
al
*/"Achmad Y. Sjarifuddin" <[EMAIL PROTECTED]>/* wrote:
agus rasidi wrote:
> Kalo memang HP di pesawat mempunyai pengaruh thdp perjalanan
pesawat,
> mengapa tidak diamankan saja oleh petugas perjalanan, penumpang
dilarang
> memegang untuk sementara alias disita dulu demi keamanan.
> Takut ? Ntar pada nggak naik pesawat, karena tidak bisa bisnis di
pesawat.
Saya kutip dari milis almamater :)
joe_anes [On Tue Jan 09, 2007 at 11:38:14AM +0700] wrote:
> Kayaknya untuk urusan HP masih dalam perdebatan deh ganggu apa
nggaknya....
> wong pilotnya aja sendiri gak ngerasa keganggu kok.
> saya malah punya kejadian menarik soal hp ini .
> Kebetulan saya punya beberapa kawan pilot..di mandala, garuda, air
> asia.... n ada beberapa lagi di maskapai lain soalnya saya memang
suka
> dgn dunia aviasi ( silaken kunjungi forum tmp biasa saya mangkal di
> www.indoflyer.net)
> Pilot ini adik dari temen baik saya... kebetulan dia pas baru mau
> takeoff dan saya sedang ada di rumah dia... tau tau hp saya
bunyi... dan
> telpon itu dari dia... dia baru aja full throthle trus gak berapa
lama
> dia bilang V one...... Rotate .......V two, positif climb gear
up......
> flap two... flap zero... flap up sambil sesekali dia ngobrol
becanda ma
> capt. nya jadi berarti hp dia gak ganggu dia kan hehehe wong masih
> sempet sempetnya dia tlp saya
> pas takeoff....
Lebih lengkap di
http://www.mail-archive.com/[EMAIL PROTECTED]/msg06470.html
--
Salam
A. Yahya Sjarifuddin.
-----------------------------------------------------------------
Milis Info dan Diskusi Warga RW 14, Kelurahan Sukahati, Cibinong.
Official Website: http://www.rw14.web.id atau http://www.rw14.org
Arsip Milis RW 14: http://www.mail-archive.com/[email protected]/
------------------------------------------------------------------------
Need a vacation? Get great deals to amazing places
<http://us.rd.yahoo.com/evt=48256/*http://travel.yahoo.com/;_ylc=X3oDMTFhN2hucjlpBF9TAzk3NDA3NTg5BHBvcwM1BHNlYwNncm91cHMEc2xrA2VtYWlsLW5jbQ-->on
Yahoo! Travel.
-----------------------------------------------------------------
Milis Info dan Diskusi Warga RW 14, Kelurahan Sukahati, Cibinong.
Official Website: http://www.rw14.web.id atau http://www.rw14.org
Arsip Milis RW 14: http://www.mail-archive.com/[email protected]/
