Apparently on date Wed, 07 Dec 2005 17:21:34 +0000, JG
<johnREMOVEglover1@tiscali.co.uk> said:
Hello,
Thinking about a Navman icn 520 but have been told because my windscreen
is heated I need an external antenna. The one recommended is Haicom:
Make quite sure you really do need an antenna. I've yet to see a *heated*
screen that blocks the GPS signals, not that that means there are none, but
going on the basis of "is it true or hearsay?"
What I have seen is french cars with various weird "solar" glass which block
them very nicely, e.g. the Renault Laguna I had on loan the other month.
Luckily for me, my smart antenna is on a wire and just went through the
passenger door gap ok.
If you need one, sure, Haicom will do fine. The tidiest fit is through the
front bulkhead somewhere where wiring is going anyway, through the engine bay
and out behind the front bumper.
Most bumpers stick out and are made of a sort of plastic that GPS sees through
so this is usually a pretty good solution. Front bumper is good because you're
generally moving forward so when the position updates, it is slightly ahead of
events, rather than lagging behind. Rear parcel shelf, as far back as it goes,
is another good place.