Question: Can you turn ON GPS device on-board commercial airlines?

The question is can i turn ON my Garmin Vista HCX handheld GPS on board commercial airlines, i meant for then entire duration from take-off to landing.?

As we all know, most electronics device emits some or abit of RF noise/interference.

Why i want to use my GPS onboard the aircraft? reason: i want know where am i when the aircraft is flying and how fast is the plane flying.

So with regards to the RF noise/interference, this may affect the aircraft safety and operation and may endanger lives of people onboard the aircraft.

Therefore i emailed our Singapore's number 1 airline in the world. Singapore Airlines regarding this particular issue. We have to be responsible for our actions which may also affect others.

The replies are as follows:
1)
xx/xxx/xxx


Dear xxx

Warm greetings. Thank you for your e-mail dated 2 August 2008.

With regards to your query, may I explain that as the portable GPS is a
transmitting device, it has to remain switched off for the

I hope this helps to clarify. Please feel free to let me know should you
have
further queries.


Yours sincerely


xxxx
Manager Customer Services
________________________________________________________________________
Visit us at http://www.singaporeair.com
________________________________________________________________________

2)
Dear xxx

Good morning.

Please be informed that in general, all electronic devices must be
switched off at all times as it may inadvertently affect the aircraft
systems.
You may wish to check again at the counter as they may be able to give you
a more definite answer after seeing your device.

Thank you for writing to us.

Best Regards,
xxxx
SIA Corporate Sales





So the conclusion:
The next time i go travel, i will need to go to the service counter at the airport, show them my GPS device and ask them whether i can leave it on for the entire flight.

Thanks to SIA for the very responsive and quick reply.
Have a nice day.