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DUKANE Beacon
DK-120 DK-140 DK-180 DK-100 DK-130

With over 100,000 in-service units in the aviation market segment, Dukane Seacom is the unmatched market leader in underwater locator beacons for the aviation market segment. Dukane…
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Dukane Seacom is the market leader in underwater locator beacons.
For over 50 years Dukane Seacom has provided high impact, water activated beacons (8KHz to 45KHz frequency range), underwater locating receivers and towed hydrophone systems to the Commercial Aircraft, Military, and marine/offshore markets.

Today, acoustic beacons are used in various applications ….

  • Aviation CVR/FDR
  • Marine VDR/ S-VDR
  • Helicopter operators
  • Offshore oil industries
  • NASA
  • Military
  • Cargo Containers
  • Other applications

Known for their extremely reliable operation all Dukane Seacom underwater location products are designed, manufactured and tested to stringent and exacting specifications. On many occasions, Dukane Seacom underwater locator beacons were instrumental in the successful recovery of aircraft and marine black boxes.

ULB devices must reliably function in extreme environments.  Each Dukane Seacom beacon is rigorously tested at our Sarasota, Florida manufacturing facility in our underwater dynamics laboratory.  Each device’s output is profiled to make sure it is compliant with all industry specifications.  Dukane Seacom ULBs have aided in the recovery of multiple aircraft and marine incidents.


With over 100,000 in-service units in the aviation market segment, Dukane Seacom is the unmatched market leader in underwater locator beacons for the aviation market segment. Dukane Seacom ULBs are the industry standard and are installed on every commercial air transport, regional and business aviation aircraft flying modern flight and data recorders. Dukane Seacom ULBs are also standard equipment on military fixed wing and rotary wing aircraft flying voice and data recorders. Dukane Seacom beacons are standard equipment for every major aviation and military black box manufacturer.

The DK120/90 was the first ULB certified to the new 90-day operating life requirement. This beacon provides a minimum of 90 day underwater operating life and is certified to TSO-C121b & TSO-C142a and ESO ETSO-C121b & ETSO-C142a.

Dukane Seacom also manufacturers the low frequency, airframe mounted DK180 series beacon. The Dukane-Seacom DK180 is designed and qualified to meet the newly developed standards FAA TSO-C200 / ETSO-C200 dated 6/26/2012 as per SAE–AS6254 & ARINC 667.

For applications not requiring compliance to the 90 day operating requirement, the DK120 and DK140 (short) are still available. The design conforms to all of the environmental requirements and is guaranteed to operate for 30 days, but they are no longer certified under TSO-C121.

Aviation Products:

Marine Products:


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