The credit card mobile phones now provided on some aircraft, do not interfere with aircraft systems because they are wired to a special "base station" that has been designed to safely receive and transmit radio signals in the aircraft.
There is a special "base station" on the ground that has been designed to safely receive and transmit radio signals in the aircraft.
It doesn't say where the base station is located. 
( z1 station :mod ( z2 base ) :ARG1-of ( z3 special ) :location ( z4 ground ) :ARG1-of ( z5 design :ARG3 ( z6 and :op ( z7 receive :ARG0 z1 :ARG1 ( z8 signal :mod ( z9 radio ) ) :location ( z10 aircraft ) :ARG0-of ( z11 safe ) ) :op ( z12 transmit :ARG0 z1 :ARG1 z8 :location z10 ) ) ) )