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2． Specification
2.1 Protective Capsule Unit: PCU (NDH-317)
(1) Function:
The Protective Capsule Unit (PCU) is not a float-free type but a fixed type. The PCU
records navigation data, hull data, conversation in the bridge, conversation over VHF
radio, and radar image data to the recording medium in the PCU.
When submerged, the Underwater Acoustic Beacon with PCU, which is battery-powered,
transmits pulsed acoustic signal for capsule searchers.
(2) Performance:
a) Interface:
1) Standard: IEEE802.3 (10Base-T/ 100Base-TX)
2) Protocol: TCP/IP
b) Recording duration and capacity:
1) Duration: 12 hours
2) Capacity: 2.0GB (flash memory)
c) Data Recording Interval:
1) Sensor Data: depends on the input from the sensors (normally 1 second)
2) Audio Data: continuous (1 audio file / minute)
3) Image Data: 1 image per 15 second (Option)
d) Acoustic underwater beacon:
1) Operating frequency: 37.5kHz ±1kHz
2) Operating time: minimum 30 days after submerged in the water
3) Detectable range: 1800m - 3600m
(depends on surrounding environment)
4) Battery life: maximum 5-years
(3) Environmental condition
There shall be neither the damage of the final record media nor the loss of recorded data
under the conditions shown below.
a) Shock: A half sine-wave pulse of 50G, with an interval of 11msec
b) Fire: 10 hours with 260 °C fire
1 hour with 1100 °C fire
c) Deep-sea water pressure: 60 Mpa
(equivalent to 6000m of depth)
General environmental condition
a) Operating temperature: -25
°C to +55°C (IEC 60945 exposed type)
b) Storage temperature -55°C to +70°C (IEC 60945 exposed type)
c）Vibration: 2Hz to 13.2Hz ±1.0mm
13.2Hz to 100Hz 0.7G
(4) General specification
a) Input voltage range: 19.5 - 36.5VDC
b) Power consumption: 3W
c) Size: 182(W) x 206.5(D) x 215(H) mm
d) Mass: 8.1kg
e) Color: fluorescent orange
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