LAAS will also provide a CAT-I capability at locations where WAAS cannot, as well as provide a signal, which could be used, for surface navigation in the terminal area. IFR receivers usually cost more than VFR receivers due to this advanced capability. A. Even in VFR conditions, some GPS receivers can produce hazardously misleading information. The approval process ensures that the receiver in question will detect such problems and avoid a user from believing they are somewhere they are not. The cost to equip an aircraft with a GPS TSO C129A receiver varies depending on the type of the receiver, the degree of difficulty of the installation, the sophistication of the aircraft and existing avionics, and the level of services desired.
Most dealers provide a package price when they sell a receiver.
This package includes installation and airworthiness inspection, as well as the actual equipment. A. GPS avionics used for primary means of oceanic operations have built in RAIM functions to prevent interference from misleading aviation users. In the remote circumstance of an unknown or unplanned event, the flight crews use back up procedures that they follow until the aircraft flies clear of the interference. The FAA is not aware of any interference to certified systems conducting this operation. The requirements for WAAS are complete, but those for LAAS are still being developed.