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ALA 52B Radar Altimeter

Overview
The ALA-52B radar altimeter takes the worry out of instrument landing at hundreds of U.S. airports. Honeywell’s unique design filters out 5G broadband interference so airlines can land safely and without restriction at night and in any weather conditions.

Electromechanical interference testing proved the ALA-52B is the only currently available radar altimeter to show almost no sign of 5G interference.The ALA-52B creates the smallest protection radius available today – much smaller than any competing radar altimeter. The protection radius is the distance between a 5G base station and an aircraft. The smaller the protection radius, the more airports an aircraft can access without landing or navigation restrictions.

Airbus and Boeing have received Alternative Means of Compliance (AMOC) certification from the FAA, which means that the Honeywell ALA-52B can be installed with minimal downtime on a wide range of models, including the Airbus A318, A319, A320, A321, A330 and A340, and the Boeing 717, 737, 747, 757, 767, 777 and 787.

The ALA-52B is the ideal solution for domestic airlines and international carriers that fly wide-body aircraft into any of the 300-plus impacted U.S. airports.

Compatible Aircraft

Airbus A318
Airbus A319
Airbus A320
Airbus A321
Airbus A330
Airbus A340
Boeing 717
Boeing 737
Boeing 747
Boeing 757
Boeing 767
Boeing 777
Boeing 787
Specifications
Key Differentiators
  • Certifications
    • ARINC 707-6
    • EUROCAE ED-30
    • FPGA certified to DO-254 Level A
  • Features & Benefits
    • 3 multifunction concept unit (MCU) form factor
    • Enhanced multipath and double bounce rejection
    • Fast Fourier transform algorithm and display select panel (DSP) processing improves accuracy
    • Software certified to DO-178B, Level A
Dimensions
  • Weight
    • 3.9 kg
    • 8.6 lbs.
Performance Data
  • Accuracy
    • ± 1.5 feet (± 0,46 metres) or 2%, whichever is greater Percentage
  • Software
    • Certified to DO-178B, Level A
  • Roll & Pitch
    • Roll ± 40º Pitch ± 20º
  • Primary Power
    • 115 Vac, 380 to 420 Hz
  • Output
    • 1 watts (Nominal)
  • Operating temperature
    • 55ºC to +70ºC (-67ºF to +158ºF)
  • Operating Range
    • -20 feet to +7500 feet
  • Frequency
    • 4.2 GHz to 4.4 GHz hertz
  • Antennas
    • The ALA-52B RALT requires two antennas; one for transmitting and one for receiving the RF signals, and a multifunction or dedicated indicator for display of altitude information.
 
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05 Feb 2025
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