ULB Underwater Locator Beacon PT-9 C-Proof 30 days
ULB Underwater Locator Beacon PT-9 C-Proof 30 days

Netwave PT9 C-PROOF Underwater Locating Device

The PT9 C-Proof is a Seawater-resistant underwater locating device. It is especially designed for the data protective capsules (FRM) of Voyage Data Recorder (VDR/SVDR) systems. It withstands the rough environmental conditions of maritime navigation, high G-shock impact and deep water immersion.   (S)VDRs which are pre MSS.333(90), can be fitted with a PT-9 ULD.


  • High degree of corrosion protection
  • Intelligent activation
  • Long-lasting battery

Discover more in the BROCHURE tab below

Specifications for PT9 C-PROOF

Operating Frequency According to DIN EN 61996
Operating Depth Surface to 6000m (surface to 20,000 feet)
Pulse Length Approx. 9 ms
Pulse Repetition Rate Approx. 0.9 Pulse/s
Operating Life 30 days (minimum)
Acoustic Output
[after 30 days]
106 N/m² rms pressure @ 1 metre (160.5 dB)
[ 70 N/m2 rms pressure @ 1 metre (157.0 dB) ]
Operating Temperature Range –2°C (28°F) to 38° C (100°F)
Actuation Fresh or salt water
Radiation Pattern Rated output over 80% of sphere
Weight, Beacon 173g (6.1 ounces)
Power Source Self-contained, lithium battery
(field replaceable)

Specifications for TAG 2550

Receiver frequency 25 kHz to 50 kHz
Power supply Lithium battery type CR1632, 350–17609
Operating voltage 3 volts
Temperature range
0°C to +40°C
Size 58 x 36 x 20mm (L x W x H)
Weight 24 grams