What happens if an aircraft disappears from the radar screen and is nowhere to be found? Searching for the wreckage of an aircraft can be simpler on land than in the ocean. To tackle this problem, ICAO has recommended an Underwater Locator Device (ULD) for overwater operations. EASA has adopted this operational requirement and now demands compliance, and other countries have similar regulations.

NEWLY added! ULD platform B737MAX (-8/-9).

Boeing-777 Boeing-777

The Solution

Our solution includes all instructions, documentation and installation hardware directly from stock:

  • An Engineering Bulletin
  • Manual supplements
  • The ULD DK180 Beacon
  • The ULD Mounting bracket
  • An aircraft adapter plate if required

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Available For

  • Airbus A320 Family, A330 and A340
  • Boeing 737, 747, 757, 767, 777, 787
  • Dash 8 Q400
  • Embraer 170, 175, 190, 195

The Benefits

A ULD is a beacon that is firmly attached to the fuselage. In the unlikely case of an aircraft becoming submerged, the ULD transmits an 8.8 kHz low-frequency acoustic signal for a minimum of 90 days. The long wavelength technology increases the detection range compared to the standard ULDs installed on FDRs and CVRs, giving recovery crews a much better chance of locating the aircraft.


ULD-Modification-Component ULD-Modification-Component
  • 900 Aircraft installed
  • 120 Operators
  • 16 Aircraft types
  • 4 Weeks lead time