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97 - ATPL - GPS satellites transmit on two L-band frequencies with different types of signals. Which of these are generally available for use by civil aviation?

Question 97 - Radio Navigation - ATPL - Airline Transport Pilot license

L1-coarse acquisition (C/A) with selected availability (S/A)
L2-for communications purpose
L1-precise (P)
L2-coarse acquisition (C/A)

Training tests and timed exam simulations ATPL - Airline Transport Pilot license