What do the NAVAIDs in the name of an IAP signify?

The NAVAIDs mentioned in the name of an Instrument Approach Procedure (IAP) signify the navigational aids that provide guidance during the final approach segment of an aircraft's descent to a runway. This crucial part of the approach typically involves specific navigational aids that help pilots line up with the runway correctly and maintain the proper glide path for landing.

For example, if the IAP includes a specific VOR or ILS in its name, it indicates that these aids are integral to the guidance provided during the final stages of the approach. This usage ensures safety and precision as the aircraft transitions from the enroute phase of flight to landing, where accurate navigation is paramount.

The other options do not accurately reflect the primary purpose of the NAVAIDs in the context of the IAP. While early phases of the flight or enroute segments may involve various navigational aids, they do not play the same critical role during the final approach phase as indicated by the NAVAIDs in the procedure's name.