Skyguide's MSAW system, installed in Geneva, has been configured to serve two different functions. Generally, the MSAW provides an alert when an aircraft deviates significantly below the minimum vectoring altitude (MVA). The MSAW also provides an alert when an aircraft on the Geneva final approach segment deviates below a user-defined approach profile; this is in effect an Approach Path Monitor (APM) function. The objective of this study was to compare the performance of the current Skyguide MSAW system on the final approach segment with that of a more typical APM system, in order to assess if any advantage would be gained.