Which system provides GPWS with ILS glideslope information?

The correct answer is VHF Navigation because it is responsible for providing essential ILS (Instrument Landing System) data, which includes glideslope information crucial for safe landings. The Ground Proximity Warning System (GPWS) utilizes this information to alert pilots about their altitude relative to the terrain and helps ensure they follow the correct glideslope during an approach.

VHF navigation systems, which operate by receiving signals from ground-based radio beacons, play a key role in guiding aircraft during approach and landing procedures by relaying these critical data. By utilizing VHF frequencies, pilots can accurately align their aircraft to maintain the proper descent path indicated by the glideslope, which is a fundamental aspect of flying safely under ILS conditions.

Other options, such as GPS systems, while they provide precise positioning information, do not typically relay the specific glideslope information used in GPWS alerts. Similarly, Terrain Awareness Systems primarily function to detect and alert pilots about potential terrain/obstacle conflicts, rather than aiding in navigation along ILS paths. Flight Management Systems manage flight plans and automate some navigation tasks but do not directly supply ILS glideslope data to GPWS.