Dukane Seacom’s DK180 is designed and certified to meet the newly developed standards FAA TSO-C200a, TSO-C142a.
The DK180 also meets SAE-AS6254a minimum performance standard for Low Frequency Underwater Locator Devices (acoustic, self-powered) & the ARINC-677 installation standard.
In the event of an accident at sea, the DK180 emits a low frequency signal (8.8kHz) in order to provide an extended detection range in locating the submerged aircraft. The beacon transmits for a minimum of 90 days and acts as a supplement to the existing Underwater Locating Devices (ULD) which are attached directly to the flight and data recorders.
- Watertight aluminum case (2” dia, 6” length).
- Capable of operation at depths of up to 20,000 feet(6096 m)
- Detectable underwater up to 7.0-12.0 NM ( 13-22 km) based on environmental factors.
- Sustained pressure up to 8700 psi.
- Water switch actuation initiates beacon operation upon immersion in either fresh or salt water.
- The battery used to power the DK180 will sustain beacon operation for a minimum of 90 days at an acoustic output of 160 dB operating frequency is 8.8 kHz.
|Operating Frequency:||8.8 kHz ± 1 kHz|
|Pulse Width:||10 milliseconds min.|
|Pulse Repetition Rate:||10 Sec max.|
|Power Source:||Lithium battery|
|Operating Life:||90 Days (Minimum)|
|Actuation:||Fresh or salt water|
|Size:||2.0 in (5.1 cm) diameter 6.0 in (15.2 cm) long|
|Weight:||26 oz (unit), 16 oz (mounting bracket/hdwr)|
|Operating Depth||Surface to 20,000 ft (6096 m)|
|Acoustic Output||160 dB re 1 μPa at 1m|
|Battery Life In Beacon||6 years|
Theory of Operation
- The DK180 is a battery operated underwater acoustic pulse generator (beacon / pinger) that is activated when the water switch is immersed in either fresh or salt water.
- The water switch is part of a low current triggering circuit, which when closed will initiate normal pulsing of the beacon oscillator circuit. The output voltage of the oscillator is coupled to the piezo-ceramic transducer ring.
- The resultant mechanical motion is transmitted to the metal case of the beacon, which in turn radiates acoustic energy into the surrounding water at 8.8 kHz.