Dukane Seacom® DK120-90 Underwater Acoustic Beacon

The DK120/90 is an underwater acoustic beacon and is the newest version of the industry standard. Once activated the DK120/90 underwater acoustic beacon will provide a minimum of 90 days of continued operation once activated, complying with TSO/ETSO-C121b.
Beacons have been tested to and meet or exceed all requirements of FAA/EASA TSO/ETSO-C121b, SAE AS8045A in with additional test for batteries as per TSO/ETSO-C142a.

FEATURES
• Operational at depths of up to 20,000 ft
• Watertight aluminum case [1.3 in. diam., 3.92 in. length (less mount)]
• Detectable at a range of 2000 to 4000 yards based on environmental factors
• Sustained pressure u to 8700 psi
• Water switch actuation initiates beacon operation upon immersion in either fresh or salt water
• Battery used to power the DK120/90 will sustain beacon operation for a minimum of 90 days at an acoustic output of 160 dB operating frequency is 37.5 kHz

SPECIFICATIONS
• Domestic/Import: Domestic
• Operating Frequency: 37.5 kHz ± 1 kHz
• Operating Depth: Surface to 20,000 feet (6096 meters)
• Pulse Length: 9.0 milliseconds Minimum
• Pulse Repetition Rate: Not less than 0.9 Pulse/Sec.
• Operating Life: 90 Days (Minimum)
• Battery Life In Beacon: 7 Years
• Acoustic Output, Initial: 1060 dynes/cm Rms. pressure at 1 meter (160.5dB)
• Acoustic Output After 90 Days: 700 dynes/cm2 Rms. pressure at 1 meter (157.0dB)
• Operating Temperature Range: +28°F (-2.2°C) to +100°F (+37.8°C)
• Actuation: Fresh or salt water
• Radiation Pattern: Rated output over 80 percent of sphere
• Size: 1.30 inches (3.30 cm) diameter x 3.92 inches (9.95 cm) long (less mount)
• Weight, Beacon: 6.7 ounces (190 grams)
• Weight, N30A26B Mount: 6 ounces (170 grams)
• Weight, N30A21A Mount: 3 ounces (85 grams)
• Storage Temperature Range: -67°F (-55°C) to 185°F (85°C)