MARK XXI Helicopter Enhanced Ground Proximity Warning System (EGPWS)

The highly affordable Mark XXI EGPWS adds the powerful safety benefits of EGPWS to VFR-equipped helicopters without radio altimeters and exceeds the FAA TSO-C151b Class B requirements. It includes an internal GPS card and interfaces to weather radar indicators, multi-function displays and stand-alone displays. In addition, Honeywell has made the installation process simple, so your helicopter can quickly return to flight.

Enhanced Features

  Proprietary Honeywell Database
       Worldwide Terrain Database (11 Regions)
       Oil Rigs
       Subscription Database Updates
  Look-ahead Algorithms
       Alerting based on projected path (turn extrapolation) and climb performance
  Internal GPS Card
  Geometric Altitude
  Display Interfaces
       Wx Radar Indicator, MFD, Standalone
  Terrain display
       Auto Display Pop-up 
       Auto Range 
       Enroute Terrain Display (Peaks) 
       Vertical Situation Display (VSD) 
  EGPWS Suppress Options
       Low Altitude Mode
       Audio Inhibit (5 minutes)
       Terrain Inhibit

Additional Features

  Tower Guy Wires
  Built-in Test


 MTBF (helicopter derated)
 7,000 operating hours   
 5,500 operating hours
 Packaging Non-ARINC
 8 watts normal operation
 10 - 32 VDC
 Mechanical (dimensions H x W x L)
 3.95 x 2.20 x 6.25 inches
 1.5 pounds
 ARINC 600-6, forced-air cooling not  required
 Meets RTCA DO-160D
 2 years
 TAWS certification
 Designed and certified to TSO-C151b.  Class B, GPWS, and terrain awareness  and display functions are tailored to  unique helicopter flight operations.