Jeff Findley wrote:

Also, why not add a couple of GLONASS antennas to the top of the
shipping container? If a hand-held GPS (e.g. iPhone) can work inside
a car, why not behind a concealed antenna "window" on the top of the
shipping container?
Jeff

In fact, I believe it's not unheard of for shipping containers to have a GPS
system built in so they can report home where they are. (This is more useful
for perishable items).

So this might not even attract attention.

--
Greg Moore
Ask me about lily, an RPI based CMC.