Model: DK-120

Dukane - Underwater Locator Beacon
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  • Underwater Acoustic Beacon
  • 4" Length Beacon with Field Replaceable Battery
  • Extended useful life
  • Designed to provide outstanding performance and reliability
  • Utilizes improved low voltage technology
  • Single cell, non-hazardous battery
  • Six year battery life
  • UL recognition, Solid cathode chemistry battery
  • Less active, more stable chemistry
  • High tolerance for rough handling
  • Manufactured to high quality design and test standards
  • Meets or exceeds all the FAA requirements without the need of any modification to existing mounting hardware (TSO-C121)
  • Operational in water up to 20,000 feet
  • Sealed Unit
Operating Frequency: 37.5 kHz ± 1 kHz Operating Depth: Surface to 20,000'
Pulse Length: Not < 9 milliseconds Pulse Repetition Rate: Not < 0.9 pulse per second
Useful Life: 6 years Operating Life: 30 Days (min)
Acoustic Output Initial: 1060 dynes/cm2rms pressure @ 1 meter Acoustic Output After 30 Days: 700 dynes/cm2rms pressure @ 1 meter
Operating Temperature: 28°F to 100°F Actuation: Fresh or salt water, surface to 20,000'
Radiation Pattern: Rated output over 80% of sphere Size: 1.3" D x 4" L
Weight: Less than 7 oz (including battery) Power Source: Lithium Battery, Field Replaceable
FAA Authorized: TSO-C121    
Part Number Underwater Acoustic Beacons Description:
DK100 4" Length Beacon
DK120 4" Length Beacon w/Field Replaceable Battery
DK130 2.97" Length Beacon
DK140 2.97" Length Beacon w/Field Replaceable Battery


- Underwater Locator Beacon
Price Condition Delivery

SEA Repair Capabilities: No

Click on a question below to see the answer. If you have a question about this model that is not answered below, please contact

The DK120/90 is certified for 90 day operation as opposed to previous beacons which were only 30 days.  Also, the DK120/90 has a 7 year battery replacement cycle.

B, C and D represent the Beacon Battery Code. The DK120 beacon label has a box which lists the code of the battery. Code B or D are considered dangerous goods, which requires hazmat shipping. Code C is not considered dangerous.
P/N 810-2007/K battery kit is for DK120 Beacons that list battery as Code B or D on the beacon label.

P/N 810-2008/K battery kit is for DK120 and DK140 Beacons that list the battery as Code C.

There is a size difference between the two battery kits; they can not be interchanged.