Honeywell's Enhanced Ground Proximity Warning Systems (EGPWS):

The state-of-the-art MK XXII EGPWS is a full-featured HTAWS system with highly advanced safety functions for IFR-equipped helicopters with a radio altimeter. This system exceeds the FAA TSO-C194 requirements. In addition to HTAWS required modes, it includes several GPWS modes and unique callouts for excessive bank angle, tail strike protection, and autorotation.