The DK-140 underwater locating beacon can operate to a depth of 20,000 feet and is authorize by the FAA. Duration of battery life in-use is six years while its operating life has a 30-day minimum range; it boasts a field-replaceable battery.
规格：
Weight:
less than 4.9 oz (139 g), including battery
Dimensions:
1.3 x 2.97 in (3.3 x 7.54 cm)
Operation Frequency:
37.5 kHz ±1 kHz
Operation Depth:
surface to 20,000 feet (6,096 m)
Pulse Length:
9 milli-seconds, minimum
Pulse Repeat Rate:
0.9 pulse/second, minimum
Useful Life:
6 years
Operating Life:
30 days, minimum
Acoustic Output, Initial:
1,060 dynes/cm2 rms pressure @ 1 meter (160.5 dB)
Acoustic Output (after 30 days):
700 dynes/cm2 rms pressure @ 1 meter (157.0 dB)
Operating Temperature:
28°F to 100°F (-2.2°C to 37.8°C)
Storage Temperature:
67°F to 185°F (-55°C to 85°C)
Actuation:
fresh or salt water
Radiation Pattern:
rated output over 80% of sphere
Material:
7075-T6 aluminum, chromate (clear) finish
Power Source:
Lithium Battery, single cell
DK120/DK140: User replaceable
DK100/DK130: Factory replaceable
特征：
Improved low voltage technology
Six year, non-hazardous, single cell battery with a solid cathode chemistry that provides a less active and more stable chemistry
Durable construction and highly reliable design
Meets or exceeds all the FAA requirements without requiring modifications
