CCS Approved Marine GMDSS 406MHz Emergency Position Indicating Radio Beacon EPIRB With GPS
1 General desctription
Cospas/Sarsat system is a satellite system that provides alarming and location data to assist searching and rescuing actions. It detects 406MHz signal from position indicating radio beacons through air- or ground-based equipment to identify the coordinates of position of accident. The accident location and other relevant information are forwarded to associated domestic searching and rescuing organizations by Cospas/Sarsat mission control center. It aims at assisting every organization with such responsibility around the world to carry on its searching and rescuing actions, no matter at sea, in the air, or on land.
The Marine GMDSS 406MHz Satellite Emergency Position-Indicating Radio Beacon EPIRB is used in the global maritime distress and safety system (GMDSS) of Cospas/Sarsat system. Following figure shows us how a global maritime accident alarming system functions based on independent identification and emergent accident signals.
Composition of the Cospas/Sarsat system:
a) 6 LEOSAR satellites;
b) Local User Terminals (LUTs);
c) Mission Control Center/Rescue Coordination Center (MCC/RCC);
d) Satellite Emergency Position Indicating Radio Beacons (EPIRBs).
EPIRB signal processing procedures:
a) Turning on of EPIRB;
b) EPIRB transmits a 0.52s-length signal that carries ship identification code or serial number, with the interval of about 50s;
c) The satellite receives signal from the EPIRB, and retransmits the signal to usable LUT within its visual angle;
d) LUT processes the received signal to get the positional information of EPIRB, and send it to MCC;
e) The information is also provided to the air unit of the Search and Air Rescue (SAR) organization through 121.5MHz homing signals.
2 Product Description
The self-floating Satellite Emergency Position Indicating Radio Beacon EPIRB, transmits 406MHz emergency signal and 121.5MHz homing signal, which meet relevant regulations of IMO/IEC and Cospas/Sarsat. It is a necessary
equipment in emergency search and rescue.
When the ship sinks down, the EPIRB will automatically release from the release device, and transmits 406MHz SOS signals. The signal will be receives by Cospas/Sarsat system satellite and forwarded to coast terminals. LUT will get the location of the position
indicating beacon through decoding and analyzing, and send the data to RCC, for carrying out emergency rescue.
The EPIRB sends emergency signal to rescue systems all around the world through satellite. The signal can be received in any place and be quickly identified and located, with the precision within 2nm.
The EPIRB meets the requirements of Cospas/Sarsat EPIRBs, and has the following two transmitters:
a) frequency of 406MHz: locate and identify signals through Cospas/Sarsat satellite;
b) aviation distress frequency of 121.5MHz: assist in searching and rescuing through automatically guiding program.
The EPIRB can be used in ships of any size, and possesses the following advantages:
a) Simple installation and storage (optimal design);
b) Simple and safe operation;
c) Able to realize manual transmitting through simple operation;
d) Simple process under emergency (ergonomics design);
e) Possesses multilevel switch protection system that prevents mis-operation. (water-activating switch, magnet switch);
f) Automatic releasing mechanism, able to be released under the depth between 2~4m, and ascend to the water surface;
g) Bright orange body case, water-tight>1bar;
h) Manual switching on for self-test;
i) Battery life: 5 years, able to continuously operate for more than 48 hours.
3 Product Specifications
| Operating temperature range: |
-20˚C ~ +55˚C |
| Storage temperature range: |
-40˚C ~ +65˚C |
| Battery: |
Li/SOCl2, period of validity: 5 years |
| Operating time: |
>48h@-20˚C, >80h@+20˚C |
| Body case: |
ABS plastic |
| Waterproof capability: |
1bar |
| Dimensions: |
Φ140/ H231.5mm (antenna not excluded) |
| Weight: |
< 1.7kg |
| Strobe light: |
24 times per minute (>1cd) |
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| 406MHz satellite signal transmitting: |
|
| Operating frequency: |
406.040MHz ± 1kHz |
| Antenna gain: |
-2~2dBi |
| Type of antenna: |
Whip mono-pole |
| Polarization: |
Vertical |
| Radiation pattern: |
Omnidirectional |
| VSWR: |
<1.5 |
| Output power: |
5W (37dBm) ± 2dB |
| Phase modulation: |
± 1.1rad ± 0.1rad |
| Repetition period: |
47.5s ~ 52.5s |
| Transmission time: |
520ms ± 1% or 440ms ± 1% |
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| 121.5MHz homing transmitting: |
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| Operating frequency: |
121.5MHz ± 6kHz |
| Output power: |
50mW (+17dBm) ± 2dB |
| Modulation type: |
A3X |
| Modulation duty cycle: |
33% ~ 43% |
| Transmission duty cycle: |
97%(continuously transmitting) |
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| Global positioning system |
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| Receiver type: |
50 Channels, GPS L1 frequency, C/A Code |
| Position accuracy: |
<100m (Horizontal, Autonomous) |
| Cold start: |
32s (Autonomous) |
| Receive antenna: |
Ceramic patch |
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